java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-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-invgen/up_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 11:58:51,146 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 11:58:51,148 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 11:58:51,161 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 11:58:51,161 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 11:58:51,162 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 11:58:51,164 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 11:58:51,166 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 11:58:51,168 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 11:58:51,169 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 11:58:51,170 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 11:58:51,170 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 11:58:51,177 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 11:58:51,178 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 11:58:51,179 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 11:58:51,181 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 11:58:51,184 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 11:58:51,185 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 11:58:51,189 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 11:58:51,190 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 11:58:51,191 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 11:58:51,194 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 11:58:51,197 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 11:58:51,212 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-24 11:58:51,238 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 11:58:51,238 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 11:58:51,239 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 11:58:51,239 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 11:58:51,240 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 11:58:51,241 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 11:58:51,241 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 11:58:51,241 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 11:58:51,241 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 11:58:51,241 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 11:58:51,242 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 11:58:51,242 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 11:58:51,242 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 11:58:51,242 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 11:58:51,242 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 11:58:51,243 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 11:58:51,243 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 11:58:51,243 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 11:58:51,244 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 11:58:51,244 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 11:58:51,244 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 11:58:51,244 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 11:58:51,244 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 11:58:51,245 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 11:58:51,245 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 11:58:51,245 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 11:58:51,245 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 11:58:51,245 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 11:58:51,311 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 11:58:51,328 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 11:58:51,331 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 11:58:51,333 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 11:58:51,333 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 11:58:51,334 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-invgen/up_true-unreach-call_true-termination.i [2018-10-24 11:58:51,394 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/662ee1c96/e4c336ba08a94e3d9d2e62b7a97409ef/FLAG71ba04b6a [2018-10-24 11:58:51,803 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 11:58:51,804 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/up_true-unreach-call_true-termination.i [2018-10-24 11:58:51,809 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/662ee1c96/e4c336ba08a94e3d9d2e62b7a97409ef/FLAG71ba04b6a [2018-10-24 11:58:51,824 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/662ee1c96/e4c336ba08a94e3d9d2e62b7a97409ef [2018-10-24 11:58:51,832 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 11:58:51,834 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 11:58:51,835 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 11:58:51,835 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 11:58:51,839 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 11:58:51,839 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:58:51" (1/1) ... [2018-10-24 11:58:51,842 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ea30b56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:58:51, skipping insertion in model container [2018-10-24 11:58:51,843 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:58:51" (1/1) ... [2018-10-24 11:58:51,853 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 11:58:51,873 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 11:58:52,058 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 11:58:52,061 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 11:58:52,081 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 11:58:52,098 INFO L193 MainTranslator]: Completed translation [2018-10-24 11:58:52,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:58:52 WrapperNode [2018-10-24 11:58:52,098 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 11:58:52,099 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 11:58:52,099 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 11:58:52,099 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 11:58:52,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:58:52" (1/1) ... [2018-10-24 11:58:52,114 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:58:52" (1/1) ... [2018-10-24 11:58:52,133 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 11:58:52,133 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 11:58:52,134 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 11:58:52,134 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 11:58:52,143 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:58:52" (1/1) ... [2018-10-24 11:58:52,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:58:52" (1/1) ... [2018-10-24 11:58:52,144 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:58:52" (1/1) ... [2018-10-24 11:58:52,144 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:58:52" (1/1) ... [2018-10-24 11:58:52,146 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:58:52" (1/1) ... [2018-10-24 11:58:52,151 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:58:52" (1/1) ... [2018-10-24 11:58:52,152 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:58:52" (1/1) ... [2018-10-24 11:58:52,153 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 11:58:52,154 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 11:58:52,154 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 11:58:52,154 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 11:58:52,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:58:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 11:58:52,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 11:58:52,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 11:58:52,499 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 11:58:52,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:58:52 BoogieIcfgContainer [2018-10-24 11:58:52,500 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 11:58:52,500 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 11:58:52,501 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 11:58:52,514 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 11:58:52,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:58:51" (1/3) ... [2018-10-24 11:58:52,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eefd73f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:58:52, skipping insertion in model container [2018-10-24 11:58:52,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:58:52" (2/3) ... [2018-10-24 11:58:52,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eefd73f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:58:52, skipping insertion in model container [2018-10-24 11:58:52,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:58:52" (3/3) ... [2018-10-24 11:58:52,524 INFO L112 eAbstractionObserver]: Analyzing ICFG up_true-unreach-call_true-termination.i [2018-10-24 11:58:52,540 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 11:58:52,549 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 11:58:52,568 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 11:58:52,613 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 11:58:52,614 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 11:58:52,614 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 11:58:52,614 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 11:58:52,614 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 11:58:52,614 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 11:58:52,617 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 11:58:52,617 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 11:58:52,617 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 11:58:52,641 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2018-10-24 11:58:52,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-24 11:58:52,648 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:52,648 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:52,651 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:52,656 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:52,657 INFO L82 PathProgramCache]: Analyzing trace with hash 383759085, now seen corresponding path program 1 times [2018-10-24 11:58:52,659 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:52,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:52,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:52,710 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:58:52,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:52,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:52,765 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:58:52,765 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 11:58:52,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-24 11:58:52,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-24 11:58:52,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-24 11:58:52,784 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 2 states. [2018-10-24 11:58:52,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:52,800 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2018-10-24 11:58:52,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-24 11:58:52,801 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2018-10-24 11:58:52,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:52,811 INFO L225 Difference]: With dead ends: 24 [2018-10-24 11:58:52,811 INFO L226 Difference]: Without dead ends: 11 [2018-10-24 11:58:52,815 INFO L605 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 [2018-10-24 11:58:52,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-24 11:58:52,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-24 11:58:52,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-24 11:58:52,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-24 11:58:52,848 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-10-24 11:58:52,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:52,849 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-24 11:58:52,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-24 11:58:52,849 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-24 11:58:52,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-24 11:58:52,850 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:52,850 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:52,850 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:52,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:52,851 INFO L82 PathProgramCache]: Analyzing trace with hash 325884241, now seen corresponding path program 1 times [2018-10-24 11:58:52,851 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:52,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:52,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:52,853 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:58:52,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:52,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:53,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:53,139 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:58:53,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 11:58:53,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 11:58:53,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 11:58:53,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-24 11:58:53,142 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 5 states. [2018-10-24 11:58:53,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:53,306 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2018-10-24 11:58:53,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 11:58:53,307 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2018-10-24 11:58:53,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:53,308 INFO L225 Difference]: With dead ends: 22 [2018-10-24 11:58:53,308 INFO L226 Difference]: Without dead ends: 13 [2018-10-24 11:58:53,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-10-24 11:58:53,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-24 11:58:53,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-24 11:58:53,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-24 11:58:53,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-10-24 11:58:53,315 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-10-24 11:58:53,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:53,316 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-10-24 11:58:53,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 11:58:53,316 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-10-24 11:58:53,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-24 11:58:53,317 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:53,317 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:53,318 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:53,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:53,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1748104565, now seen corresponding path program 1 times [2018-10-24 11:58:53,319 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:53,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:53,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:53,321 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:58:53,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:53,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:53,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:53,407 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:58:53,407 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 11:58:53,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 11:58:53,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 11:58:53,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-24 11:58:53,409 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2018-10-24 11:58:53,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:53,589 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-10-24 11:58:53,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 11:58:53,590 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-10-24 11:58:53,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:53,590 INFO L225 Difference]: With dead ends: 25 [2018-10-24 11:58:53,591 INFO L226 Difference]: Without dead ends: 23 [2018-10-24 11:58:53,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-24 11:58:53,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-24 11:58:53,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2018-10-24 11:58:53,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-24 11:58:53,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2018-10-24 11:58:53,595 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2018-10-24 11:58:53,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:53,597 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2018-10-24 11:58:53,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 11:58:53,597 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2018-10-24 11:58:53,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-24 11:58:53,599 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:53,599 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:53,600 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:53,600 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:53,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1639575084, now seen corresponding path program 1 times [2018-10-24 11:58:53,601 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:53,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:53,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:53,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:58:53,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:53,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:53,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:53,854 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:53,854 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 11:58:53,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:58:53,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:53,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:53,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:54,015 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:54,015 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-10-24 11:58:54,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 11:58:54,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 11:58:54,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-10-24 11:58:54,017 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 9 states. [2018-10-24 11:58:54,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:54,269 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2018-10-24 11:58:54,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 11:58:54,269 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-24 11:58:54,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:54,270 INFO L225 Difference]: With dead ends: 31 [2018-10-24 11:58:54,270 INFO L226 Difference]: Without dead ends: 18 [2018-10-24 11:58:54,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2018-10-24 11:58:54,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-24 11:58:54,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-24 11:58:54,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-24 11:58:54,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-10-24 11:58:54,275 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2018-10-24 11:58:54,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:54,275 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-10-24 11:58:54,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 11:58:54,275 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-10-24 11:58:54,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-24 11:58:54,276 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:54,276 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:54,277 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:54,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:54,277 INFO L82 PathProgramCache]: Analyzing trace with hash 842542990, now seen corresponding path program 2 times [2018-10-24 11:58:54,277 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:54,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:54,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:54,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:58:54,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:54,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:54,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:54,390 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:54,391 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 11:58:54,404 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:58:54,423 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:58:54,423 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:54,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:54,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:54,479 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:54,479 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2018-10-24 11:58:54,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 11:58:54,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 11:58:54,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-24 11:58:54,480 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2018-10-24 11:58:54,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:54,850 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-10-24 11:58:54,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-24 11:58:54,850 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-10-24 11:58:54,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:54,851 INFO L225 Difference]: With dead ends: 31 [2018-10-24 11:58:54,852 INFO L226 Difference]: Without dead ends: 29 [2018-10-24 11:58:54,854 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-10-24 11:58:54,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-24 11:58:54,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2018-10-24 11:58:54,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-24 11:58:54,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-10-24 11:58:54,864 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2018-10-24 11:58:54,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:54,864 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-10-24 11:58:54,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 11:58:54,865 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-10-24 11:58:54,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-24 11:58:54,866 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:54,867 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:54,867 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:54,867 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:54,867 INFO L82 PathProgramCache]: Analyzing trace with hash -46138025, now seen corresponding path program 3 times [2018-10-24 11:58:54,867 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:54,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:54,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:54,869 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:54,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:54,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:55,104 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:55,105 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:55,105 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 11:58:55,113 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:58:55,126 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-24 11:58:55,126 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:55,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:55,225 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:55,254 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:55,254 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2018-10-24 11:58:55,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-24 11:58:55,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-24 11:58:55,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2018-10-24 11:58:55,256 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 12 states. [2018-10-24 11:58:55,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:55,453 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-10-24 11:58:55,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 11:58:55,453 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-24 11:58:55,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:55,454 INFO L225 Difference]: With dead ends: 41 [2018-10-24 11:58:55,454 INFO L226 Difference]: Without dead ends: 24 [2018-10-24 11:58:55,455 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2018-10-24 11:58:55,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-24 11:58:55,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-24 11:58:55,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-24 11:58:55,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-10-24 11:58:55,460 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2018-10-24 11:58:55,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:55,460 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-10-24 11:58:55,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-24 11:58:55,460 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-10-24 11:58:55,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-24 11:58:55,461 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:55,461 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:55,462 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:55,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:55,462 INFO L82 PathProgramCache]: Analyzing trace with hash -676370543, now seen corresponding path program 4 times [2018-10-24 11:58:55,462 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:55,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:55,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:55,463 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:55,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:55,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:55,585 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:55,586 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:55,586 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 11:58:55,593 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:58:55,608 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:58:55,609 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:55,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:55,658 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:55,679 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:55,679 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2018-10-24 11:58:55,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 11:58:55,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 11:58:55,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-10-24 11:58:55,681 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 9 states. [2018-10-24 11:58:55,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:55,896 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-10-24 11:58:55,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-24 11:58:55,897 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2018-10-24 11:58:55,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:55,898 INFO L225 Difference]: With dead ends: 37 [2018-10-24 11:58:55,898 INFO L226 Difference]: Without dead ends: 35 [2018-10-24 11:58:55,899 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2018-10-24 11:58:55,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-24 11:58:55,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2018-10-24 11:58:55,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-24 11:58:55,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2018-10-24 11:58:55,907 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 23 [2018-10-24 11:58:55,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:55,907 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2018-10-24 11:58:55,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 11:58:55,907 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2018-10-24 11:58:55,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-24 11:58:55,908 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:55,908 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:55,909 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:55,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:55,909 INFO L82 PathProgramCache]: Analyzing trace with hash 612727770, now seen corresponding path program 5 times [2018-10-24 11:58:55,909 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:55,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:55,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:55,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:55,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:55,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:56,188 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:56,189 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:56,189 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 11:58:56,199 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:58:56,214 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-24 11:58:56,215 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:56,217 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:56,301 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:56,321 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:56,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2018-10-24 11:58:56,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-24 11:58:56,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-24 11:58:56,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2018-10-24 11:58:56,323 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 15 states. [2018-10-24 11:58:56,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:56,798 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2018-10-24 11:58:56,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-24 11:58:56,802 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2018-10-24 11:58:56,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:56,803 INFO L225 Difference]: With dead ends: 51 [2018-10-24 11:58:56,803 INFO L226 Difference]: Without dead ends: 30 [2018-10-24 11:58:56,804 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2018-10-24 11:58:56,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-24 11:58:56,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-24 11:58:56,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-24 11:58:56,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-10-24 11:58:56,809 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2018-10-24 11:58:56,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:56,809 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-10-24 11:58:56,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-24 11:58:56,809 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-10-24 11:58:56,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-24 11:58:56,810 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:56,810 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:56,810 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:56,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:56,811 INFO L82 PathProgramCache]: Analyzing trace with hash -2140745068, now seen corresponding path program 6 times [2018-10-24 11:58:56,811 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:56,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:56,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:56,812 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:56,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:56,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:56,947 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:56,947 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:56,947 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 11:58:56,955 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:58:56,974 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-24 11:58:56,974 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:56,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:57,015 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:57,045 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:57,045 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2018-10-24 11:58:57,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 11:58:57,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 11:58:57,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-10-24 11:58:57,046 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2018-10-24 11:58:57,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:57,184 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-10-24 11:58:57,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-24 11:58:57,185 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2018-10-24 11:58:57,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:57,186 INFO L225 Difference]: With dead ends: 43 [2018-10-24 11:58:57,186 INFO L226 Difference]: Without dead ends: 41 [2018-10-24 11:58:57,187 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2018-10-24 11:58:57,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-24 11:58:57,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2018-10-24 11:58:57,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-24 11:58:57,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2018-10-24 11:58:57,193 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2018-10-24 11:58:57,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:57,193 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2018-10-24 11:58:57,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 11:58:57,193 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2018-10-24 11:58:57,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-24 11:58:57,194 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:57,194 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:57,195 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:57,195 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:57,195 INFO L82 PathProgramCache]: Analyzing trace with hash 2109320541, now seen corresponding path program 7 times [2018-10-24 11:58:57,195 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:57,195 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:57,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:57,197 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:57,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:57,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:57,386 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:57,387 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:57,387 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 11:58:57,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:58:57,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:57,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:57,552 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:57,573 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:57,573 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2018-10-24 11:58:57,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-24 11:58:57,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-24 11:58:57,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2018-10-24 11:58:57,574 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 18 states. [2018-10-24 11:58:57,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:57,826 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2018-10-24 11:58:57,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-24 11:58:57,827 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2018-10-24 11:58:57,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:57,828 INFO L225 Difference]: With dead ends: 61 [2018-10-24 11:58:57,828 INFO L226 Difference]: Without dead ends: 36 [2018-10-24 11:58:57,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2018-10-24 11:58:57,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-24 11:58:57,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-24 11:58:57,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-24 11:58:57,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-10-24 11:58:57,835 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 33 [2018-10-24 11:58:57,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:57,835 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-10-24 11:58:57,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-24 11:58:57,835 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-10-24 11:58:57,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-24 11:58:57,836 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:57,837 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:57,837 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:57,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:57,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1946783895, now seen corresponding path program 8 times [2018-10-24 11:58:57,837 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:57,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:57,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:57,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:58:57,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:57,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:57,985 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 30 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:57,986 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:57,986 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 11:58:57,994 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:58:58,024 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:58:58,024 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:58,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:58,056 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 30 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:58,085 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:58,085 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-10-24 11:58:58,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-24 11:58:58,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-24 11:58:58,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-10-24 11:58:58,087 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 11 states. [2018-10-24 11:58:58,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:58,257 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-10-24 11:58:58,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-24 11:58:58,258 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2018-10-24 11:58:58,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:58,259 INFO L225 Difference]: With dead ends: 49 [2018-10-24 11:58:58,259 INFO L226 Difference]: Without dead ends: 47 [2018-10-24 11:58:58,260 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2018-10-24 11:58:58,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-24 11:58:58,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2018-10-24 11:58:58,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-24 11:58:58,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2018-10-24 11:58:58,268 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 35 [2018-10-24 11:58:58,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:58,268 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2018-10-24 11:58:58,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-24 11:58:58,269 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2018-10-24 11:58:58,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-24 11:58:58,270 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:58,270 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:58,270 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:58,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:58,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1173860832, now seen corresponding path program 9 times [2018-10-24 11:58:58,271 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:58,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:58,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:58,272 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:58,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:58,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:58,529 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:58,530 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:58,530 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 11:58:58,538 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:58:58,635 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-24 11:58:58,635 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:58,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:58,955 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:58,975 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:58,975 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2018-10-24 11:58:58,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-24 11:58:58,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-24 11:58:58,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2018-10-24 11:58:58,976 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 21 states. [2018-10-24 11:58:59,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:59,282 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2018-10-24 11:58:59,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-24 11:58:59,282 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 39 [2018-10-24 11:58:59,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:59,283 INFO L225 Difference]: With dead ends: 71 [2018-10-24 11:58:59,284 INFO L226 Difference]: Without dead ends: 42 [2018-10-24 11:58:59,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2018-10-24 11:58:59,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-24 11:58:59,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-24 11:58:59,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-24 11:58:59,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-10-24 11:58:59,291 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2018-10-24 11:58:59,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:59,291 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-10-24 11:58:59,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-24 11:58:59,292 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-10-24 11:58:59,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-24 11:58:59,292 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:59,293 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:59,293 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:59,293 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:59,293 INFO L82 PathProgramCache]: Analyzing trace with hash 666550682, now seen corresponding path program 10 times [2018-10-24 11:58:59,293 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:59,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:59,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:59,294 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:59,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:59,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:59,677 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 42 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:59,678 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:59,678 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 11:58:59,688 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:58:59,709 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:58:59,709 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:59,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:59,758 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 42 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:59,779 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:59,779 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2018-10-24 11:58:59,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-24 11:58:59,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-24 11:58:59,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-10-24 11:58:59,780 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 12 states. [2018-10-24 11:58:59,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:59,998 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-10-24 11:58:59,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-24 11:58:59,998 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2018-10-24 11:58:59,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:59,999 INFO L225 Difference]: With dead ends: 55 [2018-10-24 11:58:59,999 INFO L226 Difference]: Without dead ends: 53 [2018-10-24 11:59:00,000 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2018-10-24 11:59:00,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-24 11:59:00,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2018-10-24 11:59:00,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-24 11:59:00,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-10-24 11:59:00,008 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 41 [2018-10-24 11:59:00,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:00,008 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-10-24 11:59:00,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-24 11:59:00,009 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-10-24 11:59:00,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-24 11:59:00,010 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:00,010 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:00,010 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:00,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:00,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1808968035, now seen corresponding path program 11 times [2018-10-24 11:59:00,011 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:00,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:00,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:00,012 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:00,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:00,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:00,349 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:00,349 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:00,349 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 11:59:00,357 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:59:00,386 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-24 11:59:00,386 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:00,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:00,642 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:00,663 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:00,663 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2018-10-24 11:59:00,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-24 11:59:00,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-24 11:59:00,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2018-10-24 11:59:00,664 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 24 states. [2018-10-24 11:59:01,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:01,176 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2018-10-24 11:59:01,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-24 11:59:01,176 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 45 [2018-10-24 11:59:01,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:01,177 INFO L225 Difference]: With dead ends: 81 [2018-10-24 11:59:01,177 INFO L226 Difference]: Without dead ends: 48 [2018-10-24 11:59:01,178 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=259, Invalid=733, Unknown=0, NotChecked=0, Total=992 [2018-10-24 11:59:01,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-24 11:59:01,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-24 11:59:01,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-24 11:59:01,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-10-24 11:59:01,185 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45 [2018-10-24 11:59:01,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:01,185 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-10-24 11:59:01,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-24 11:59:01,185 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-10-24 11:59:01,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-24 11:59:01,186 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:01,186 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:01,186 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:01,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:01,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1676311139, now seen corresponding path program 12 times [2018-10-24 11:59:01,187 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:01,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:01,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:01,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:01,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:01,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:01,387 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 56 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:01,388 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:01,388 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 11:59:01,395 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:59:01,428 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-24 11:59:01,429 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:01,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:01,464 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 56 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:01,485 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:01,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2018-10-24 11:59:01,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-24 11:59:01,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-24 11:59:01,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2018-10-24 11:59:01,487 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 13 states. [2018-10-24 11:59:01,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:01,731 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-10-24 11:59:01,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-24 11:59:01,731 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2018-10-24 11:59:01,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:01,732 INFO L225 Difference]: With dead ends: 61 [2018-10-24 11:59:01,732 INFO L226 Difference]: Without dead ends: 59 [2018-10-24 11:59:01,733 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=169, Invalid=293, Unknown=0, NotChecked=0, Total=462 [2018-10-24 11:59:01,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-24 11:59:01,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2018-10-24 11:59:01,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-24 11:59:01,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2018-10-24 11:59:01,741 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 47 [2018-10-24 11:59:01,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:01,742 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2018-10-24 11:59:01,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-24 11:59:01,742 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2018-10-24 11:59:01,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-24 11:59:01,743 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:01,743 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:01,743 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:01,743 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:01,743 INFO L82 PathProgramCache]: Analyzing trace with hash -313150490, now seen corresponding path program 13 times [2018-10-24 11:59:01,744 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:01,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:01,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:01,745 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:01,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:01,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:02,361 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 105 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:02,361 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:02,361 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 11:59:02,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:02,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:02,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:02,680 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 105 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:02,701 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:02,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2018-10-24 11:59:02,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-24 11:59:02,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-24 11:59:02,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2018-10-24 11:59:02,702 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 27 states. [2018-10-24 11:59:02,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:02,955 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2018-10-24 11:59:02,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-24 11:59:02,955 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 51 [2018-10-24 11:59:02,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:02,956 INFO L225 Difference]: With dead ends: 91 [2018-10-24 11:59:02,956 INFO L226 Difference]: Without dead ends: 54 [2018-10-24 11:59:02,957 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=323, Invalid=937, Unknown=0, NotChecked=0, Total=1260 [2018-10-24 11:59:02,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-24 11:59:02,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-24 11:59:02,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-24 11:59:02,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-10-24 11:59:02,969 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 51 [2018-10-24 11:59:02,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:02,969 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-10-24 11:59:02,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-24 11:59:02,970 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-10-24 11:59:02,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-24 11:59:02,970 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:02,971 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:02,971 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:02,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:02,971 INFO L82 PathProgramCache]: Analyzing trace with hash 992804000, now seen corresponding path program 14 times [2018-10-24 11:59:02,971 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:02,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:02,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:02,972 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:02,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:02,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:03,129 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 72 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:03,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:03,129 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 11:59:03,139 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:59:03,165 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:59:03,166 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:03,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:03,372 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 72 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:03,392 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:03,393 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2018-10-24 11:59:03,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-24 11:59:03,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-24 11:59:03,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2018-10-24 11:59:03,394 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 14 states. [2018-10-24 11:59:03,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:03,587 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-10-24 11:59:03,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-24 11:59:03,587 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2018-10-24 11:59:03,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:03,589 INFO L225 Difference]: With dead ends: 67 [2018-10-24 11:59:03,589 INFO L226 Difference]: Without dead ends: 65 [2018-10-24 11:59:03,590 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2018-10-24 11:59:03,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-24 11:59:03,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2018-10-24 11:59:03,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-24 11:59:03,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2018-10-24 11:59:03,600 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 53 [2018-10-24 11:59:03,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:03,600 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2018-10-24 11:59:03,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-24 11:59:03,600 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2018-10-24 11:59:03,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-24 11:59:03,601 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:03,602 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:03,602 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:03,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:03,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1241255575, now seen corresponding path program 15 times [2018-10-24 11:59:03,602 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:03,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:03,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:03,604 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:03,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:03,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:03,874 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 136 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:03,874 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:03,874 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 11:59:03,881 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:59:03,920 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-24 11:59:03,920 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:03,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:04,143 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 136 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:04,170 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:04,170 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 30 [2018-10-24 11:59:04,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-24 11:59:04,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-24 11:59:04,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2018-10-24 11:59:04,172 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 30 states. [2018-10-24 11:59:04,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:04,466 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2018-10-24 11:59:04,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-24 11:59:04,467 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 57 [2018-10-24 11:59:04,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:04,467 INFO L225 Difference]: With dead ends: 101 [2018-10-24 11:59:04,467 INFO L226 Difference]: Without dead ends: 60 [2018-10-24 11:59:04,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=394, Invalid=1166, Unknown=0, NotChecked=0, Total=1560 [2018-10-24 11:59:04,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-24 11:59:04,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-24 11:59:04,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-24 11:59:04,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-10-24 11:59:04,476 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 57 [2018-10-24 11:59:04,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:04,477 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-10-24 11:59:04,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-24 11:59:04,477 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-10-24 11:59:04,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-24 11:59:04,478 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:04,478 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:04,478 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:04,478 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:04,478 INFO L82 PathProgramCache]: Analyzing trace with hash 915162787, now seen corresponding path program 16 times [2018-10-24 11:59:04,479 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:04,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:04,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:04,480 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:04,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:04,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:04,734 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 90 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:04,734 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:04,734 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 11:59:04,743 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:59:04,779 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:59:04,779 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:04,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:04,808 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 90 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:04,829 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:04,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2018-10-24 11:59:04,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-24 11:59:04,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-24 11:59:04,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2018-10-24 11:59:04,831 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 15 states. [2018-10-24 11:59:05,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:05,111 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-10-24 11:59:05,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-24 11:59:05,112 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 59 [2018-10-24 11:59:05,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:05,112 INFO L225 Difference]: With dead ends: 73 [2018-10-24 11:59:05,112 INFO L226 Difference]: Without dead ends: 71 [2018-10-24 11:59:05,113 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2018-10-24 11:59:05,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-24 11:59:05,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2018-10-24 11:59:05,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-24 11:59:05,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2018-10-24 11:59:05,123 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 59 [2018-10-24 11:59:05,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:05,123 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2018-10-24 11:59:05,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-24 11:59:05,124 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2018-10-24 11:59:05,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-24 11:59:05,124 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:05,124 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:05,125 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:05,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:05,125 INFO L82 PathProgramCache]: Analyzing trace with hash -52919828, now seen corresponding path program 17 times [2018-10-24 11:59:05,125 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:05,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:05,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:05,126 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:05,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:05,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:05,550 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 171 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:05,550 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:05,550 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 11:59:05,559 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:59:05,592 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-24 11:59:05,592 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:05,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:06,266 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 171 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:06,286 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:06,287 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 33 [2018-10-24 11:59:06,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-24 11:59:06,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-24 11:59:06,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2018-10-24 11:59:06,288 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 33 states. [2018-10-24 11:59:06,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:06,755 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2018-10-24 11:59:06,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-24 11:59:06,756 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 63 [2018-10-24 11:59:06,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:06,757 INFO L225 Difference]: With dead ends: 111 [2018-10-24 11:59:06,757 INFO L226 Difference]: Without dead ends: 66 [2018-10-24 11:59:06,758 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=472, Invalid=1420, Unknown=0, NotChecked=0, Total=1892 [2018-10-24 11:59:06,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-24 11:59:06,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-24 11:59:06,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-24 11:59:06,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-10-24 11:59:06,767 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 63 [2018-10-24 11:59:06,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:06,767 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-10-24 11:59:06,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-24 11:59:06,768 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-10-24 11:59:06,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-24 11:59:06,768 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:06,768 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:06,769 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:06,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:06,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1698071462, now seen corresponding path program 18 times [2018-10-24 11:59:06,769 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:06,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:06,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:06,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:06,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:06,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:06,982 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 110 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:06,983 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:06,983 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 11:59:06,991 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:59:07,073 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-10-24 11:59:07,073 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:07,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:07,158 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 110 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:07,179 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:07,179 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2018-10-24 11:59:07,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-24 11:59:07,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-24 11:59:07,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2018-10-24 11:59:07,180 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 16 states. [2018-10-24 11:59:07,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:07,572 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-10-24 11:59:07,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-24 11:59:07,573 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2018-10-24 11:59:07,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:07,573 INFO L225 Difference]: With dead ends: 79 [2018-10-24 11:59:07,574 INFO L226 Difference]: Without dead ends: 77 [2018-10-24 11:59:07,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=277, Invalid=479, Unknown=0, NotChecked=0, Total=756 [2018-10-24 11:59:07,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-24 11:59:07,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2018-10-24 11:59:07,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-24 11:59:07,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2018-10-24 11:59:07,583 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 65 [2018-10-24 11:59:07,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:07,583 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2018-10-24 11:59:07,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-24 11:59:07,583 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2018-10-24 11:59:07,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-24 11:59:07,584 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:07,584 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:07,584 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:07,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:07,584 INFO L82 PathProgramCache]: Analyzing trace with hash 575047023, now seen corresponding path program 19 times [2018-10-24 11:59:07,584 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:07,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:07,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:07,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:07,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:07,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:08,345 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 210 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:08,345 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:08,345 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 11:59:08,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:08,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:08,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:08,685 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 210 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:08,708 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:08,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 36 [2018-10-24 11:59:08,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-24 11:59:08,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-24 11:59:08,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2018-10-24 11:59:08,709 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 36 states. [2018-10-24 11:59:09,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:09,645 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2018-10-24 11:59:09,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-24 11:59:09,645 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 69 [2018-10-24 11:59:09,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:09,646 INFO L225 Difference]: With dead ends: 121 [2018-10-24 11:59:09,646 INFO L226 Difference]: Without dead ends: 72 [2018-10-24 11:59:09,647 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=557, Invalid=1699, Unknown=0, NotChecked=0, Total=2256 [2018-10-24 11:59:09,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-24 11:59:09,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-24 11:59:09,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-24 11:59:09,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-10-24 11:59:09,657 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 69 [2018-10-24 11:59:09,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:09,657 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-10-24 11:59:09,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-24 11:59:09,657 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-10-24 11:59:09,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-24 11:59:09,658 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:09,658 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:09,658 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:09,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:09,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1582902359, now seen corresponding path program 20 times [2018-10-24 11:59:09,659 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:09,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:09,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:09,659 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:09,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:09,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:10,134 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 132 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:10,134 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:10,134 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 11:59:10,142 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:59:10,173 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:59:10,173 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:10,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:10,316 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 132 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:10,337 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:10,337 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2018-10-24 11:59:10,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-24 11:59:10,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-24 11:59:10,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2018-10-24 11:59:10,338 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 17 states. [2018-10-24 11:59:10,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:10,654 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-10-24 11:59:10,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-24 11:59:10,657 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2018-10-24 11:59:10,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:10,658 INFO L225 Difference]: With dead ends: 85 [2018-10-24 11:59:10,658 INFO L226 Difference]: Without dead ends: 83 [2018-10-24 11:59:10,659 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=319, Invalid=551, Unknown=0, NotChecked=0, Total=870 [2018-10-24 11:59:10,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-24 11:59:10,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2018-10-24 11:59:10,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-24 11:59:10,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2018-10-24 11:59:10,669 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 71 [2018-10-24 11:59:10,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:10,669 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2018-10-24 11:59:10,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-24 11:59:10,670 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2018-10-24 11:59:10,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-24 11:59:10,670 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:10,670 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:10,671 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:10,671 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:10,671 INFO L82 PathProgramCache]: Analyzing trace with hash 238623730, now seen corresponding path program 21 times [2018-10-24 11:59:10,671 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:10,671 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:10,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:10,672 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:10,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:10,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:11,556 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 253 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:11,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:11,556 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 11:59:11,564 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:59:11,604 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-24 11:59:11,605 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:11,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:12,245 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 253 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:12,266 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:12,266 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 39 [2018-10-24 11:59:12,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-24 11:59:12,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-24 11:59:12,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1119, Unknown=0, NotChecked=0, Total=1482 [2018-10-24 11:59:12,267 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 39 states. [2018-10-24 11:59:12,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:12,690 INFO L93 Difference]: Finished difference Result 131 states and 133 transitions. [2018-10-24 11:59:12,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-24 11:59:12,690 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 75 [2018-10-24 11:59:12,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:12,691 INFO L225 Difference]: With dead ends: 131 [2018-10-24 11:59:12,691 INFO L226 Difference]: Without dead ends: 78 [2018-10-24 11:59:12,694 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=649, Invalid=2003, Unknown=0, NotChecked=0, Total=2652 [2018-10-24 11:59:12,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-24 11:59:12,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-24 11:59:12,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-24 11:59:12,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-10-24 11:59:12,704 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 75 [2018-10-24 11:59:12,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:12,704 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-10-24 11:59:12,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-24 11:59:12,705 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-10-24 11:59:12,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-24 11:59:12,705 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:12,705 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:12,706 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:12,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:12,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1479518548, now seen corresponding path program 22 times [2018-10-24 11:59:12,706 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:12,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:12,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:12,707 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:12,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:12,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:12,969 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 156 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:12,969 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:12,970 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 11:59:12,985 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:59:13,034 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:59:13,034 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:13,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:13,283 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 156 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:13,317 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:13,317 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2018-10-24 11:59:13,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-24 11:59:13,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-24 11:59:13,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-10-24 11:59:13,319 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 18 states. [2018-10-24 11:59:13,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:13,691 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2018-10-24 11:59:13,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-24 11:59:13,691 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 77 [2018-10-24 11:59:13,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:13,692 INFO L225 Difference]: With dead ends: 91 [2018-10-24 11:59:13,693 INFO L226 Difference]: Without dead ends: 89 [2018-10-24 11:59:13,694 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=364, Invalid=628, Unknown=0, NotChecked=0, Total=992 [2018-10-24 11:59:13,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-24 11:59:13,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2018-10-24 11:59:13,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-24 11:59:13,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2018-10-24 11:59:13,704 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 77 [2018-10-24 11:59:13,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:13,705 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2018-10-24 11:59:13,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-24 11:59:13,705 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2018-10-24 11:59:13,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-24 11:59:13,706 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:13,706 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:13,706 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:13,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:13,706 INFO L82 PathProgramCache]: Analyzing trace with hash 236152181, now seen corresponding path program 23 times [2018-10-24 11:59:13,706 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:13,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:13,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:13,707 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:13,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:13,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:14,103 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 300 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:14,103 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:14,103 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 11:59:14,111 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:59:14,155 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-24 11:59:14,155 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:14,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:14,619 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 300 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:14,639 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:14,639 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 42 [2018-10-24 11:59:14,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-24 11:59:14,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-24 11:59:14,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1303, Unknown=0, NotChecked=0, Total=1722 [2018-10-24 11:59:14,641 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 42 states. [2018-10-24 11:59:15,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:15,350 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2018-10-24 11:59:15,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-24 11:59:15,350 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 81 [2018-10-24 11:59:15,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:15,351 INFO L225 Difference]: With dead ends: 141 [2018-10-24 11:59:15,351 INFO L226 Difference]: Without dead ends: 84 [2018-10-24 11:59:15,352 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=748, Invalid=2332, Unknown=0, NotChecked=0, Total=3080 [2018-10-24 11:59:15,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-24 11:59:15,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-24 11:59:15,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-24 11:59:15,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2018-10-24 11:59:15,361 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 81 [2018-10-24 11:59:15,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:15,362 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2018-10-24 11:59:15,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-24 11:59:15,362 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2018-10-24 11:59:15,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-24 11:59:15,362 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:15,362 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:15,363 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:15,363 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:15,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1931357359, now seen corresponding path program 24 times [2018-10-24 11:59:15,363 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:15,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:15,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:15,364 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:15,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:15,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:15,563 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 182 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:15,564 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:15,564 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:15,573 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:59:15,622 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-10-24 11:59:15,622 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:15,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:15,662 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 182 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:15,683 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:15,683 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2018-10-24 11:59:15,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-24 11:59:15,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-24 11:59:15,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-10-24 11:59:15,684 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 19 states. [2018-10-24 11:59:15,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:15,984 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-10-24 11:59:15,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-24 11:59:15,985 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 83 [2018-10-24 11:59:15,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:15,986 INFO L225 Difference]: With dead ends: 97 [2018-10-24 11:59:15,986 INFO L226 Difference]: Without dead ends: 95 [2018-10-24 11:59:15,987 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=412, Invalid=710, Unknown=0, NotChecked=0, Total=1122 [2018-10-24 11:59:15,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-24 11:59:15,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 88. [2018-10-24 11:59:15,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-24 11:59:15,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2018-10-24 11:59:15,999 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 83 [2018-10-24 11:59:15,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:15,999 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2018-10-24 11:59:15,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-24 11:59:16,000 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2018-10-24 11:59:16,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-24 11:59:16,000 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:16,000 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:16,000 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:16,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:16,001 INFO L82 PathProgramCache]: Analyzing trace with hash 850428408, now seen corresponding path program 25 times [2018-10-24 11:59:16,001 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:16,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:16,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:16,002 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:16,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:16,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:16,558 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 351 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:16,558 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:16,558 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:16,566 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:16,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:16,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:17,016 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 351 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:17,036 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:17,037 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 45 [2018-10-24 11:59:17,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-24 11:59:17,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-24 11:59:17,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=1501, Unknown=0, NotChecked=0, Total=1980 [2018-10-24 11:59:17,038 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 45 states. [2018-10-24 11:59:17,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:17,602 INFO L93 Difference]: Finished difference Result 151 states and 153 transitions. [2018-10-24 11:59:17,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-24 11:59:17,603 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 87 [2018-10-24 11:59:17,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:17,604 INFO L225 Difference]: With dead ends: 151 [2018-10-24 11:59:17,604 INFO L226 Difference]: Without dead ends: 90 [2018-10-24 11:59:17,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=854, Invalid=2686, Unknown=0, NotChecked=0, Total=3540 [2018-10-24 11:59:17,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-24 11:59:17,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-24 11:59:17,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-24 11:59:17,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2018-10-24 11:59:17,615 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 87 [2018-10-24 11:59:17,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:17,615 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2018-10-24 11:59:17,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-24 11:59:17,615 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2018-10-24 11:59:17,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-24 11:59:17,616 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:17,616 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:17,616 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:17,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:17,616 INFO L82 PathProgramCache]: Analyzing trace with hash 477328818, now seen corresponding path program 26 times [2018-10-24 11:59:17,617 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:17,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:17,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:17,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:17,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:17,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:17,962 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 210 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:17,962 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:17,962 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:17,971 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:59:18,011 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:59:18,012 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:18,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:18,051 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 210 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:18,072 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:18,072 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2018-10-24 11:59:18,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-24 11:59:18,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-24 11:59:18,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2018-10-24 11:59:18,073 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 20 states. [2018-10-24 11:59:18,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:18,403 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2018-10-24 11:59:18,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-24 11:59:18,404 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 89 [2018-10-24 11:59:18,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:18,405 INFO L225 Difference]: With dead ends: 103 [2018-10-24 11:59:18,405 INFO L226 Difference]: Without dead ends: 101 [2018-10-24 11:59:18,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=463, Invalid=797, Unknown=0, NotChecked=0, Total=1260 [2018-10-24 11:59:18,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-24 11:59:18,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 94. [2018-10-24 11:59:18,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-24 11:59:18,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2018-10-24 11:59:18,419 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 89 [2018-10-24 11:59:18,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:18,419 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2018-10-24 11:59:18,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-24 11:59:18,420 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2018-10-24 11:59:18,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-24 11:59:18,420 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:18,420 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:18,421 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:18,421 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:18,421 INFO L82 PathProgramCache]: Analyzing trace with hash 778277243, now seen corresponding path program 27 times [2018-10-24 11:59:18,421 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:18,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:18,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:18,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:18,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:18,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:19,033 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 406 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:19,033 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:19,033 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:19,042 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:59:19,102 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-24 11:59:19,102 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:19,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:19,637 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 406 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:19,659 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:19,659 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 48 [2018-10-24 11:59:19,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-24 11:59:19,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-24 11:59:19,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=543, Invalid=1713, Unknown=0, NotChecked=0, Total=2256 [2018-10-24 11:59:19,661 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 48 states. [2018-10-24 11:59:20,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:20,473 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2018-10-24 11:59:20,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-24 11:59:20,473 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 93 [2018-10-24 11:59:20,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:20,474 INFO L225 Difference]: With dead ends: 161 [2018-10-24 11:59:20,474 INFO L226 Difference]: Without dead ends: 96 [2018-10-24 11:59:20,476 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=967, Invalid=3065, Unknown=0, NotChecked=0, Total=4032 [2018-10-24 11:59:20,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-24 11:59:20,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-24 11:59:20,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-24 11:59:20,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2018-10-24 11:59:20,491 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 93 [2018-10-24 11:59:20,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:20,491 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2018-10-24 11:59:20,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-24 11:59:20,492 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2018-10-24 11:59:20,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-24 11:59:20,492 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:20,492 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:20,493 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:20,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:20,493 INFO L82 PathProgramCache]: Analyzing trace with hash 942363061, now seen corresponding path program 28 times [2018-10-24 11:59:20,493 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:20,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:20,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:20,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:20,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:20,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:20,790 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 240 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:20,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:20,790 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:20,798 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:59:20,837 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:59:20,838 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:20,840 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:20,879 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 240 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:20,900 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:20,900 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2018-10-24 11:59:20,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-24 11:59:20,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-24 11:59:20,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2018-10-24 11:59:20,901 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 21 states. [2018-10-24 11:59:21,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:21,209 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-10-24 11:59:21,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-24 11:59:21,210 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 95 [2018-10-24 11:59:21,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:21,211 INFO L225 Difference]: With dead ends: 109 [2018-10-24 11:59:21,211 INFO L226 Difference]: Without dead ends: 107 [2018-10-24 11:59:21,212 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=517, Invalid=889, Unknown=0, NotChecked=0, Total=1406 [2018-10-24 11:59:21,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-24 11:59:21,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 100. [2018-10-24 11:59:21,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-24 11:59:21,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2018-10-24 11:59:21,225 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 95 [2018-10-24 11:59:21,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:21,225 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2018-10-24 11:59:21,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-24 11:59:21,225 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2018-10-24 11:59:21,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-24 11:59:21,225 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:21,226 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:21,226 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:21,226 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:21,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1292389378, now seen corresponding path program 29 times [2018-10-24 11:59:21,226 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:21,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:21,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:21,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:21,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:21,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:22,306 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 465 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:22,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:22,306 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:22,314 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:59:22,551 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-24 11:59:22,551 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:22,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:23,140 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 465 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:23,161 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:23,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 51 [2018-10-24 11:59:23,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-24 11:59:23,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-24 11:59:23,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=1939, Unknown=0, NotChecked=0, Total=2550 [2018-10-24 11:59:23,163 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 51 states. [2018-10-24 11:59:23,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:23,746 INFO L93 Difference]: Finished difference Result 171 states and 173 transitions. [2018-10-24 11:59:23,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-24 11:59:23,746 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 99 [2018-10-24 11:59:23,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:23,747 INFO L225 Difference]: With dead ends: 171 [2018-10-24 11:59:23,747 INFO L226 Difference]: Without dead ends: 102 [2018-10-24 11:59:23,749 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1087, Invalid=3469, Unknown=0, NotChecked=0, Total=4556 [2018-10-24 11:59:23,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-24 11:59:23,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-24 11:59:23,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-24 11:59:23,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2018-10-24 11:59:23,763 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 99 [2018-10-24 11:59:23,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:23,763 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2018-10-24 11:59:23,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-24 11:59:23,763 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2018-10-24 11:59:23,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-24 11:59:23,764 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:23,764 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:23,764 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:23,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:23,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1273438024, now seen corresponding path program 30 times [2018-10-24 11:59:23,764 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:23,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:23,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:23,765 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:23,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:23,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:24,247 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 272 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:24,247 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:24,247 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:24,259 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:59:24,316 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-10-24 11:59:24,317 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:24,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:24,362 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 272 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:24,383 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:24,383 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2018-10-24 11:59:24,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-24 11:59:24,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-24 11:59:24,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2018-10-24 11:59:24,384 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 22 states. [2018-10-24 11:59:24,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:24,719 INFO L93 Difference]: Finished difference Result 115 states and 116 transitions. [2018-10-24 11:59:24,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-24 11:59:24,719 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 101 [2018-10-24 11:59:24,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:24,720 INFO L225 Difference]: With dead ends: 115 [2018-10-24 11:59:24,720 INFO L226 Difference]: Without dead ends: 113 [2018-10-24 11:59:24,721 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=574, Invalid=986, Unknown=0, NotChecked=0, Total=1560 [2018-10-24 11:59:24,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-24 11:59:24,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 106. [2018-10-24 11:59:24,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-24 11:59:24,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2018-10-24 11:59:24,739 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 101 [2018-10-24 11:59:24,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:24,739 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2018-10-24 11:59:24,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-24 11:59:24,739 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2018-10-24 11:59:24,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-24 11:59:24,740 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:24,740 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:24,740 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:24,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:24,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1336936833, now seen corresponding path program 31 times [2018-10-24 11:59:24,740 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:24,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:24,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:24,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:24,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:24,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:25,749 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 528 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:25,750 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:25,750 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:25,757 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:25,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:25,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:26,930 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 528 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:26,951 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:26,951 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 54 [2018-10-24 11:59:26,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-24 11:59:26,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-24 11:59:26,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=2179, Unknown=0, NotChecked=0, Total=2862 [2018-10-24 11:59:26,953 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 54 states. [2018-10-24 11:59:28,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:28,742 INFO L93 Difference]: Finished difference Result 181 states and 183 transitions. [2018-10-24 11:59:28,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-24 11:59:28,742 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 105 [2018-10-24 11:59:28,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:28,743 INFO L225 Difference]: With dead ends: 181 [2018-10-24 11:59:28,743 INFO L226 Difference]: Without dead ends: 108 [2018-10-24 11:59:28,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1214, Invalid=3898, Unknown=0, NotChecked=0, Total=5112 [2018-10-24 11:59:28,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-24 11:59:28,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-10-24 11:59:28,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-24 11:59:28,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2018-10-24 11:59:28,757 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 105 [2018-10-24 11:59:28,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:28,757 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2018-10-24 11:59:28,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-24 11:59:28,758 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2018-10-24 11:59:28,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-24 11:59:28,758 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:28,758 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:28,758 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:28,759 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:28,759 INFO L82 PathProgramCache]: Analyzing trace with hash 898056891, now seen corresponding path program 32 times [2018-10-24 11:59:28,759 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:28,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:28,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:28,760 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:28,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:28,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:29,075 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 306 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:29,076 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:29,076 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:29,085 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:59:29,137 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:59:29,137 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:29,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:29,192 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 306 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:29,212 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:29,212 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2018-10-24 11:59:29,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-24 11:59:29,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-24 11:59:29,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2018-10-24 11:59:29,213 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 23 states. [2018-10-24 11:59:29,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:29,579 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-10-24 11:59:29,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-24 11:59:29,579 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 107 [2018-10-24 11:59:29,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:29,580 INFO L225 Difference]: With dead ends: 121 [2018-10-24 11:59:29,581 INFO L226 Difference]: Without dead ends: 119 [2018-10-24 11:59:29,581 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=634, Invalid=1088, Unknown=0, NotChecked=0, Total=1722 [2018-10-24 11:59:29,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-24 11:59:29,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 112. [2018-10-24 11:59:29,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-24 11:59:29,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2018-10-24 11:59:29,597 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 107 [2018-10-24 11:59:29,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:29,597 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2018-10-24 11:59:29,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-24 11:59:29,597 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2018-10-24 11:59:29,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-24 11:59:29,598 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:29,598 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:29,598 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:29,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:29,598 INFO L82 PathProgramCache]: Analyzing trace with hash -817384956, now seen corresponding path program 33 times [2018-10-24 11:59:29,599 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:29,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:29,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:29,599 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:29,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:29,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:30,214 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 595 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:30,214 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:30,215 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:30,221 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:59:30,286 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-24 11:59:30,286 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:30,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:31,252 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 595 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:31,272 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:31,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 57 [2018-10-24 11:59:31,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-24 11:59:31,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-24 11:59:31,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=759, Invalid=2433, Unknown=0, NotChecked=0, Total=3192 [2018-10-24 11:59:31,274 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 57 states. [2018-10-24 11:59:32,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:32,376 INFO L93 Difference]: Finished difference Result 191 states and 193 transitions. [2018-10-24 11:59:32,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-24 11:59:32,376 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 111 [2018-10-24 11:59:32,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:32,377 INFO L225 Difference]: With dead ends: 191 [2018-10-24 11:59:32,377 INFO L226 Difference]: Without dead ends: 114 [2018-10-24 11:59:32,378 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1348, Invalid=4352, Unknown=0, NotChecked=0, Total=5700 [2018-10-24 11:59:32,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-24 11:59:32,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-10-24 11:59:32,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-24 11:59:32,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2018-10-24 11:59:32,393 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 111 [2018-10-24 11:59:32,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:32,393 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2018-10-24 11:59:32,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-24 11:59:32,394 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2018-10-24 11:59:32,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-24 11:59:32,394 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:32,394 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:32,395 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:32,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:32,395 INFO L82 PathProgramCache]: Analyzing trace with hash -147220546, now seen corresponding path program 34 times [2018-10-24 11:59:32,395 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:32,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:32,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:32,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:32,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:32,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:32,844 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 342 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:32,844 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:32,844 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:32,852 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:59:32,901 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:59:32,901 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:32,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:32,989 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 342 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:33,010 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:33,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2018-10-24 11:59:33,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-24 11:59:33,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-24 11:59:33,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2018-10-24 11:59:33,011 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 24 states. [2018-10-24 11:59:33,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:33,430 INFO L93 Difference]: Finished difference Result 127 states and 128 transitions. [2018-10-24 11:59:33,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-24 11:59:33,431 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2018-10-24 11:59:33,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:33,432 INFO L225 Difference]: With dead ends: 127 [2018-10-24 11:59:33,432 INFO L226 Difference]: Without dead ends: 125 [2018-10-24 11:59:33,433 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=697, Invalid=1195, Unknown=0, NotChecked=0, Total=1892 [2018-10-24 11:59:33,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-24 11:59:33,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 118. [2018-10-24 11:59:33,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-24 11:59:33,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2018-10-24 11:59:33,452 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 113 [2018-10-24 11:59:33,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:33,452 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2018-10-24 11:59:33,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-24 11:59:33,452 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2018-10-24 11:59:33,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-24 11:59:33,453 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:33,453 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:33,453 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:33,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:33,453 INFO L82 PathProgramCache]: Analyzing trace with hash 368168327, now seen corresponding path program 35 times [2018-10-24 11:59:33,454 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:33,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:33,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:33,454 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:33,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:33,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:34,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 666 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:34,237 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:34,237 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:34,244 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:59:34,306 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-24 11:59:34,306 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:34,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:34,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 666 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:35,013 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:35,014 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 60 [2018-10-24 11:59:35,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-24 11:59:35,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-24 11:59:35,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=839, Invalid=2701, Unknown=0, NotChecked=0, Total=3540 [2018-10-24 11:59:35,015 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand 60 states. [2018-10-24 11:59:37,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:37,896 INFO L93 Difference]: Finished difference Result 201 states and 203 transitions. [2018-10-24 11:59:37,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-24 11:59:37,896 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 117 [2018-10-24 11:59:37,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:37,897 INFO L225 Difference]: With dead ends: 201 [2018-10-24 11:59:37,897 INFO L226 Difference]: Without dead ends: 120 [2018-10-24 11:59:37,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1489, Invalid=4831, Unknown=0, NotChecked=0, Total=6320 [2018-10-24 11:59:37,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-10-24 11:59:37,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-10-24 11:59:37,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-10-24 11:59:37,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2018-10-24 11:59:37,922 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 117 [2018-10-24 11:59:37,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:37,922 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2018-10-24 11:59:37,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-24 11:59:37,922 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2018-10-24 11:59:37,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-10-24 11:59:37,923 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:37,923 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:37,924 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:37,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:37,924 INFO L82 PathProgramCache]: Analyzing trace with hash 661323713, now seen corresponding path program 36 times [2018-10-24 11:59:37,924 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:37,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:37,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:37,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:37,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:37,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:38,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 380 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:38,381 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:38,381 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:38,394 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:59:38,465 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-10-24 11:59:38,465 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:38,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:38,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 380 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:38,831 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:38,831 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2018-10-24 11:59:38,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-24 11:59:38,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-24 11:59:38,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2018-10-24 11:59:38,832 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand 25 states. [2018-10-24 11:59:40,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:40,042 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2018-10-24 11:59:40,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-24 11:59:40,043 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 119 [2018-10-24 11:59:40,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:40,044 INFO L225 Difference]: With dead ends: 133 [2018-10-24 11:59:40,044 INFO L226 Difference]: Without dead ends: 131 [2018-10-24 11:59:40,044 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=763, Invalid=1307, Unknown=0, NotChecked=0, Total=2070 [2018-10-24 11:59:40,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-24 11:59:40,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 124. [2018-10-24 11:59:40,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-24 11:59:40,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2018-10-24 11:59:40,063 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 119 [2018-10-24 11:59:40,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:40,063 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2018-10-24 11:59:40,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-24 11:59:40,063 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2018-10-24 11:59:40,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-24 11:59:40,064 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:40,064 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:40,064 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:40,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:40,064 INFO L82 PathProgramCache]: Analyzing trace with hash 2136570890, now seen corresponding path program 37 times [2018-10-24 11:59:40,064 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:40,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:40,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:40,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:40,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:40,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:41,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1121 backedges. 741 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:41,194 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:41,194 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:41,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:41,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:41,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:42,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1121 backedges. 741 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:42,193 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:42,193 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 63 [2018-10-24 11:59:42,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-24 11:59:42,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-24 11:59:42,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=923, Invalid=2983, Unknown=0, NotChecked=0, Total=3906 [2018-10-24 11:59:42,194 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand 63 states. [2018-10-24 11:59:43,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:43,214 INFO L93 Difference]: Finished difference Result 211 states and 213 transitions. [2018-10-24 11:59:43,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-24 11:59:43,215 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 123 [2018-10-24 11:59:43,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:43,215 INFO L225 Difference]: With dead ends: 211 [2018-10-24 11:59:43,215 INFO L226 Difference]: Without dead ends: 126 [2018-10-24 11:59:43,216 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1637, Invalid=5335, Unknown=0, NotChecked=0, Total=6972 [2018-10-24 11:59:43,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-24 11:59:43,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-10-24 11:59:43,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-10-24 11:59:43,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2018-10-24 11:59:43,241 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 123 [2018-10-24 11:59:43,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:43,241 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2018-10-24 11:59:43,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-24 11:59:43,241 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2018-10-24 11:59:43,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-24 11:59:43,242 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:43,242 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:43,242 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:43,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:43,243 INFO L82 PathProgramCache]: Analyzing trace with hash -976315708, now seen corresponding path program 38 times [2018-10-24 11:59:43,243 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:43,243 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:43,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:43,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:43,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:43,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:44,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 420 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:44,057 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:44,057 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:44,068 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:59:44,128 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:59:44,129 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:44,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:44,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 420 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:44,198 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:44,198 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2018-10-24 11:59:44,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-24 11:59:44,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-24 11:59:44,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2018-10-24 11:59:44,199 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand 26 states. [2018-10-24 11:59:44,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:44,628 INFO L93 Difference]: Finished difference Result 139 states and 140 transitions. [2018-10-24 11:59:44,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-24 11:59:44,628 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 125 [2018-10-24 11:59:44,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:44,630 INFO L225 Difference]: With dead ends: 139 [2018-10-24 11:59:44,630 INFO L226 Difference]: Without dead ends: 137 [2018-10-24 11:59:44,630 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=832, Invalid=1424, Unknown=0, NotChecked=0, Total=2256 [2018-10-24 11:59:44,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-24 11:59:44,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 130. [2018-10-24 11:59:44,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-10-24 11:59:44,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2018-10-24 11:59:44,657 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 125 [2018-10-24 11:59:44,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:44,657 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2018-10-24 11:59:44,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-24 11:59:44,658 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2018-10-24 11:59:44,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-10-24 11:59:44,658 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:44,658 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:44,659 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:44,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:44,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1130242675, now seen corresponding path program 39 times [2018-10-24 11:59:44,659 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:44,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:44,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:44,660 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:44,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:44,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:45,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 820 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:45,464 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:45,464 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:45,472 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:59:45,598 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-24 11:59:45,599 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:45,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:46,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 820 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:46,648 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:46,648 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 66 [2018-10-24 11:59:46,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-24 11:59:46,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-24 11:59:46,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1011, Invalid=3279, Unknown=0, NotChecked=0, Total=4290 [2018-10-24 11:59:46,650 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand 66 states. [2018-10-24 11:59:47,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:47,742 INFO L93 Difference]: Finished difference Result 221 states and 223 transitions. [2018-10-24 11:59:47,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-24 11:59:47,743 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 129 [2018-10-24 11:59:47,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:47,744 INFO L225 Difference]: With dead ends: 221 [2018-10-24 11:59:47,744 INFO L226 Difference]: Without dead ends: 132 [2018-10-24 11:59:47,745 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1491 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1792, Invalid=5864, Unknown=0, NotChecked=0, Total=7656 [2018-10-24 11:59:47,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-10-24 11:59:47,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-10-24 11:59:47,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-10-24 11:59:47,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2018-10-24 11:59:47,772 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 129 [2018-10-24 11:59:47,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:47,772 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2018-10-24 11:59:47,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-24 11:59:47,772 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2018-10-24 11:59:47,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-10-24 11:59:47,773 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:47,773 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 20, 20, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:47,773 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:47,774 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:47,774 INFO L82 PathProgramCache]: Analyzing trace with hash 26183879, now seen corresponding path program 40 times [2018-10-24 11:59:47,774 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:47,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:47,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:47,775 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:47,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:47,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:49,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1282 backedges. 462 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:49,838 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:49,838 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:49,861 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:59:49,913 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:59:49,914 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:49,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:49,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1282 backedges. 462 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:49,988 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:49,988 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2018-10-24 11:59:49,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-24 11:59:49,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-24 11:59:49,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2018-10-24 11:59:49,989 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand 27 states. [2018-10-24 11:59:50,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:50,491 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2018-10-24 11:59:50,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-24 11:59:50,491 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 131 [2018-10-24 11:59:50,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:50,492 INFO L225 Difference]: With dead ends: 145 [2018-10-24 11:59:50,492 INFO L226 Difference]: Without dead ends: 143 [2018-10-24 11:59:50,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=904, Invalid=1546, Unknown=0, NotChecked=0, Total=2450 [2018-10-24 11:59:50,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-24 11:59:50,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 136. [2018-10-24 11:59:50,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-24 11:59:50,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2018-10-24 11:59:50,518 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 131 [2018-10-24 11:59:50,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:50,518 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2018-10-24 11:59:50,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-24 11:59:50,518 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2018-10-24 11:59:50,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-24 11:59:50,519 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:50,519 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:50,519 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:50,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:50,519 INFO L82 PathProgramCache]: Analyzing trace with hash 845550096, now seen corresponding path program 41 times [2018-10-24 11:59:50,520 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:50,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:50,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:50,520 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:50,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:50,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:51,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 903 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:51,619 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:51,619 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:51,626 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:59:51,703 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-24 11:59:51,703 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:51,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:52,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 903 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:52,578 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:52,578 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 69 [2018-10-24 11:59:52,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-24 11:59:52,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-24 11:59:52,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1103, Invalid=3589, Unknown=0, NotChecked=0, Total=4692 [2018-10-24 11:59:52,580 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand 69 states. [2018-10-24 11:59:53,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:53,875 INFO L93 Difference]: Finished difference Result 231 states and 233 transitions. [2018-10-24 11:59:53,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-24 11:59:53,875 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 135 [2018-10-24 11:59:53,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:53,876 INFO L225 Difference]: With dead ends: 231 [2018-10-24 11:59:53,876 INFO L226 Difference]: Without dead ends: 138 [2018-10-24 11:59:53,877 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1639 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1954, Invalid=6418, Unknown=0, NotChecked=0, Total=8372 [2018-10-24 11:59:53,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-24 11:59:53,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-10-24 11:59:53,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-10-24 11:59:53,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2018-10-24 11:59:53,901 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 135 [2018-10-24 11:59:53,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:53,901 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2018-10-24 11:59:53,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-24 11:59:53,902 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2018-10-24 11:59:53,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-24 11:59:53,902 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:53,902 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 21, 21, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:53,902 INFO L424 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:53,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:53,903 INFO L82 PathProgramCache]: Analyzing trace with hash 391178698, now seen corresponding path program 42 times [2018-10-24 11:59:53,903 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:53,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:53,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:53,903 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:53,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:53,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:54,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1409 backedges. 506 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:54,878 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:54,878 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:54,885 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:59:54,968 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-10-24 11:59:54,968 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:54,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:55,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1409 backedges. 506 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:55,063 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:55,064 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2018-10-24 11:59:55,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-24 11:59:55,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-24 11:59:55,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2018-10-24 11:59:55,065 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand 28 states. [2018-10-24 11:59:55,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:55,558 INFO L93 Difference]: Finished difference Result 151 states and 152 transitions. [2018-10-24 11:59:55,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-24 11:59:55,559 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 137 [2018-10-24 11:59:55,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:55,560 INFO L225 Difference]: With dead ends: 151 [2018-10-24 11:59:55,560 INFO L226 Difference]: Without dead ends: 149 [2018-10-24 11:59:55,561 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=979, Invalid=1673, Unknown=0, NotChecked=0, Total=2652 [2018-10-24 11:59:55,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-24 11:59:55,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 142. [2018-10-24 11:59:55,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-10-24 11:59:55,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2018-10-24 11:59:55,583 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 137 [2018-10-24 11:59:55,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:55,583 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2018-10-24 11:59:55,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-24 11:59:55,583 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2018-10-24 11:59:55,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-10-24 11:59:55,584 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:55,584 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:55,584 INFO L424 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:55,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:55,584 INFO L82 PathProgramCache]: Analyzing trace with hash -692504173, now seen corresponding path program 43 times [2018-10-24 11:59:55,584 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:55,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:55,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:55,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:55,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:55,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:56,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1496 backedges. 990 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:56,730 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:56,730 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:56,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:56,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:56,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:57,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1496 backedges. 990 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:57,798 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:57,798 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 72 [2018-10-24 11:59:57,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-24 11:59:57,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-24 11:59:57,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1199, Invalid=3913, Unknown=0, NotChecked=0, Total=5112 [2018-10-24 11:59:57,800 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand 72 states. [2018-10-24 11:59:59,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:59,079 INFO L93 Difference]: Finished difference Result 241 states and 243 transitions. [2018-10-24 11:59:59,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-24 11:59:59,080 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 141 [2018-10-24 11:59:59,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:59,081 INFO L225 Difference]: With dead ends: 241 [2018-10-24 11:59:59,081 INFO L226 Difference]: Without dead ends: 144 [2018-10-24 11:59:59,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2123, Invalid=6997, Unknown=0, NotChecked=0, Total=9120 [2018-10-24 11:59:59,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-10-24 11:59:59,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-10-24 11:59:59,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-10-24 11:59:59,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2018-10-24 11:59:59,108 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 141 [2018-10-24 11:59:59,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:59,108 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2018-10-24 11:59:59,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-24 11:59:59,108 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2018-10-24 11:59:59,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-10-24 11:59:59,109 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:59,109 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 22, 22, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:59,109 INFO L424 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:59,109 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:59,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1355948595, now seen corresponding path program 44 times [2018-10-24 11:59:59,109 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:59,110 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:59,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:59,110 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:59,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:59,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:00,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1542 backedges. 552 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:00,380 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:00,380 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:00,388 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 12:00:00,451 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 12:00:00,451 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:00,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:00,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1542 backedges. 552 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:00,846 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:00,846 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2018-10-24 12:00:00,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-24 12:00:00,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-24 12:00:00,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2018-10-24 12:00:00,847 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand 29 states. [2018-10-24 12:00:01,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:01,575 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2018-10-24 12:00:01,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-24 12:00:01,576 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 143 [2018-10-24 12:00:01,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:01,577 INFO L225 Difference]: With dead ends: 157 [2018-10-24 12:00:01,577 INFO L226 Difference]: Without dead ends: 155 [2018-10-24 12:00:01,577 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1057, Invalid=1805, Unknown=0, NotChecked=0, Total=2862 [2018-10-24 12:00:01,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-24 12:00:01,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 148. [2018-10-24 12:00:01,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-24 12:00:01,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2018-10-24 12:00:01,601 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 143 [2018-10-24 12:00:01,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:01,601 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2018-10-24 12:00:01,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-24 12:00:01,602 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2018-10-24 12:00:01,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-24 12:00:01,602 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:01,602 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:01,602 INFO L424 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:01,603 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:01,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1893305322, now seen corresponding path program 45 times [2018-10-24 12:00:01,603 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:01,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:01,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:01,603 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:01,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:01,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:03,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1633 backedges. 1081 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:03,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:03,359 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:03,367 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:00:03,450 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-24 12:00:03,450 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:03,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:05,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1633 backedges. 1081 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:05,488 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:05,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 75 [2018-10-24 12:00:05,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-24 12:00:05,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-24 12:00:05,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1299, Invalid=4251, Unknown=0, NotChecked=0, Total=5550 [2018-10-24 12:00:05,489 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand 75 states. [2018-10-24 12:00:07,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:07,037 INFO L93 Difference]: Finished difference Result 251 states and 253 transitions. [2018-10-24 12:00:07,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-24 12:00:07,037 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 147 [2018-10-24 12:00:07,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:07,038 INFO L225 Difference]: With dead ends: 251 [2018-10-24 12:00:07,038 INFO L226 Difference]: Without dead ends: 150 [2018-10-24 12:00:07,039 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1956 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2299, Invalid=7601, Unknown=0, NotChecked=0, Total=9900 [2018-10-24 12:00:07,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-10-24 12:00:07,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-10-24 12:00:07,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-10-24 12:00:07,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2018-10-24 12:00:07,064 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 147 [2018-10-24 12:00:07,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:07,064 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2018-10-24 12:00:07,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-24 12:00:07,064 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2018-10-24 12:00:07,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-24 12:00:07,065 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:07,065 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:07,065 INFO L424 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:07,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:07,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1162246960, now seen corresponding path program 46 times [2018-10-24 12:00:07,066 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:07,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:07,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:07,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:07,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:07,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:07,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 600 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:07,500 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:07,501 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:07,511 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:00:07,575 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:00:07,575 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:07,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:07,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 600 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:07,656 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:07,656 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2018-10-24 12:00:07,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-24 12:00:07,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-24 12:00:07,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2018-10-24 12:00:07,657 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand 30 states. [2018-10-24 12:00:08,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:08,222 INFO L93 Difference]: Finished difference Result 163 states and 164 transitions. [2018-10-24 12:00:08,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-24 12:00:08,222 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 149 [2018-10-24 12:00:08,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:08,223 INFO L225 Difference]: With dead ends: 163 [2018-10-24 12:00:08,223 INFO L226 Difference]: Without dead ends: 161 [2018-10-24 12:00:08,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1138, Invalid=1942, Unknown=0, NotChecked=0, Total=3080 [2018-10-24 12:00:08,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-24 12:00:08,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 154. [2018-10-24 12:00:08,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-10-24 12:00:08,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2018-10-24 12:00:08,254 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 149 [2018-10-24 12:00:08,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:08,254 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2018-10-24 12:00:08,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-24 12:00:08,255 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2018-10-24 12:00:08,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-10-24 12:00:08,255 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:08,255 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:08,255 INFO L424 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:08,256 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:08,256 INFO L82 PathProgramCache]: Analyzing trace with hash 246473113, now seen corresponding path program 47 times [2018-10-24 12:00:08,256 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:08,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:08,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:08,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:08,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:08,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:09,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1776 backedges. 1176 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:09,917 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:09,917 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:09,925 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 12:00:10,010 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-24 12:00:10,010 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:10,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:11,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1776 backedges. 1176 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:11,066 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:11,066 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 78 [2018-10-24 12:00:11,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-24 12:00:11,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-24 12:00:11,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1403, Invalid=4603, Unknown=0, NotChecked=0, Total=6006 [2018-10-24 12:00:11,067 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand 78 states. [2018-10-24 12:00:12,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:12,551 INFO L93 Difference]: Finished difference Result 261 states and 263 transitions. [2018-10-24 12:00:12,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-24 12:00:12,551 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 153 [2018-10-24 12:00:12,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:12,552 INFO L225 Difference]: With dead ends: 261 [2018-10-24 12:00:12,552 INFO L226 Difference]: Without dead ends: 156 [2018-10-24 12:00:12,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2125 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2482, Invalid=8230, Unknown=0, NotChecked=0, Total=10712 [2018-10-24 12:00:12,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-10-24 12:00:12,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-10-24 12:00:12,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-10-24 12:00:12,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2018-10-24 12:00:12,579 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 153 [2018-10-24 12:00:12,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:12,579 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2018-10-24 12:00:12,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-24 12:00:12,579 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2018-10-24 12:00:12,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-10-24 12:00:12,580 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:12,580 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 24, 24, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:12,580 INFO L424 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:12,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:12,581 INFO L82 PathProgramCache]: Analyzing trace with hash -755040557, now seen corresponding path program 48 times [2018-10-24 12:00:12,581 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:12,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:12,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:12,581 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:12,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:12,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:13,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1826 backedges. 650 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:13,148 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:13,149 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:13,155 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 12:00:13,243 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-10-24 12:00:13,244 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:13,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1826 backedges. 650 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:13,307 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:13,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2018-10-24 12:00:13,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-24 12:00:13,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-24 12:00:13,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2018-10-24 12:00:13,309 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand 31 states. [2018-10-24 12:00:13,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:13,887 INFO L93 Difference]: Finished difference Result 169 states and 170 transitions. [2018-10-24 12:00:13,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-24 12:00:13,887 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 155 [2018-10-24 12:00:13,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:13,889 INFO L225 Difference]: With dead ends: 169 [2018-10-24 12:00:13,889 INFO L226 Difference]: Without dead ends: 167 [2018-10-24 12:00:13,889 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1222, Invalid=2084, Unknown=0, NotChecked=0, Total=3306 [2018-10-24 12:00:13,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-24 12:00:13,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 160. [2018-10-24 12:00:13,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-24 12:00:13,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2018-10-24 12:00:13,917 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 155 [2018-10-24 12:00:13,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:13,918 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2018-10-24 12:00:13,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-24 12:00:13,918 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2018-10-24 12:00:13,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-10-24 12:00:13,919 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:13,919 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:13,919 INFO L424 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:13,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:13,920 INFO L82 PathProgramCache]: Analyzing trace with hash 869507612, now seen corresponding path program 49 times [2018-10-24 12:00:13,920 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:13,920 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:13,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:13,920 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:13,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:13,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:14,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1925 backedges. 1275 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:14,997 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:14,997 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:15,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:00:15,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:15,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:16,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1925 backedges. 1275 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:16,468 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:16,468 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 81 [2018-10-24 12:00:16,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-24 12:00:16,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-24 12:00:16,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1511, Invalid=4969, Unknown=0, NotChecked=0, Total=6480 [2018-10-24 12:00:16,469 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand 81 states. [2018-10-24 12:00:18,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:18,300 INFO L93 Difference]: Finished difference Result 271 states and 273 transitions. [2018-10-24 12:00:18,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-24 12:00:18,300 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 159 [2018-10-24 12:00:18,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:18,301 INFO L225 Difference]: With dead ends: 271 [2018-10-24 12:00:18,301 INFO L226 Difference]: Without dead ends: 162 [2018-10-24 12:00:18,302 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2301 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2672, Invalid=8884, Unknown=0, NotChecked=0, Total=11556 [2018-10-24 12:00:18,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-10-24 12:00:18,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-10-24 12:00:18,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-10-24 12:00:18,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2018-10-24 12:00:18,331 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 159 [2018-10-24 12:00:18,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:18,331 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2018-10-24 12:00:18,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-24 12:00:18,331 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2018-10-24 12:00:18,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-10-24 12:00:18,332 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:18,332 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 25, 25, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:18,332 INFO L424 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:18,332 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:18,333 INFO L82 PathProgramCache]: Analyzing trace with hash 377580502, now seen corresponding path program 50 times [2018-10-24 12:00:18,333 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:18,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:18,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:18,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:00:18,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:18,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:18,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1977 backedges. 702 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:18,796 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:18,796 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:18,806 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 12:00:18,877 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 12:00:18,878 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:18,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:19,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1977 backedges. 702 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:19,363 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:19,363 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2018-10-24 12:00:19,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-24 12:00:19,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-24 12:00:19,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2018-10-24 12:00:19,364 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand 32 states. [2018-10-24 12:00:19,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:19,986 INFO L93 Difference]: Finished difference Result 175 states and 176 transitions. [2018-10-24 12:00:19,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-24 12:00:19,987 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 161 [2018-10-24 12:00:19,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:19,988 INFO L225 Difference]: With dead ends: 175 [2018-10-24 12:00:19,988 INFO L226 Difference]: Without dead ends: 173 [2018-10-24 12:00:19,989 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1309, Invalid=2231, Unknown=0, NotChecked=0, Total=3540 [2018-10-24 12:00:19,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-24 12:00:20,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 166. [2018-10-24 12:00:20,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-10-24 12:00:20,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2018-10-24 12:00:20,019 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 161 [2018-10-24 12:00:20,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:20,019 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2018-10-24 12:00:20,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-24 12:00:20,019 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2018-10-24 12:00:20,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-10-24 12:00:20,020 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:20,020 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:20,020 INFO L424 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:20,020 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:20,020 INFO L82 PathProgramCache]: Analyzing trace with hash -427698785, now seen corresponding path program 51 times [2018-10-24 12:00:20,020 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:20,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:20,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:20,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:20,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:20,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:21,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1378 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:21,097 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:21,097 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:21,105 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:00:21,201 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-24 12:00:21,201 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:21,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:22,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1378 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:22,894 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:22,894 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 84 [2018-10-24 12:00:22,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-24 12:00:22,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-24 12:00:22,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1623, Invalid=5349, Unknown=0, NotChecked=0, Total=6972 [2018-10-24 12:00:22,896 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand 84 states. [2018-10-24 12:00:24,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:24,603 INFO L93 Difference]: Finished difference Result 281 states and 283 transitions. [2018-10-24 12:00:24,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-24 12:00:24,603 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 165 [2018-10-24 12:00:24,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:24,604 INFO L225 Difference]: With dead ends: 281 [2018-10-24 12:00:24,604 INFO L226 Difference]: Without dead ends: 168 [2018-10-24 12:00:24,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2869, Invalid=9563, Unknown=0, NotChecked=0, Total=12432 [2018-10-24 12:00:24,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-10-24 12:00:24,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2018-10-24 12:00:24,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-10-24 12:00:24,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 169 transitions. [2018-10-24 12:00:24,635 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 169 transitions. Word has length 165 [2018-10-24 12:00:24,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:24,635 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 169 transitions. [2018-10-24 12:00:24,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-24 12:00:24,635 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 169 transitions. [2018-10-24 12:00:24,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-10-24 12:00:24,636 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:24,636 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 26, 26, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:24,636 INFO L424 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:24,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:24,636 INFO L82 PathProgramCache]: Analyzing trace with hash -2026116135, now seen corresponding path program 52 times [2018-10-24 12:00:24,636 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:24,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:24,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:24,637 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:24,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:24,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:25,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2134 backedges. 756 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:25,211 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:25,211 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:25,219 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:00:25,304 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:00:25,304 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:25,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:25,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2134 backedges. 756 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:25,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:25,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2018-10-24 12:00:25,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-24 12:00:25,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-24 12:00:25,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2018-10-24 12:00:25,519 INFO L87 Difference]: Start difference. First operand 168 states and 169 transitions. Second operand 33 states. [2018-10-24 12:00:26,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:26,164 INFO L93 Difference]: Finished difference Result 181 states and 182 transitions. [2018-10-24 12:00:26,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-24 12:00:26,164 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 167 [2018-10-24 12:00:26,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:26,165 INFO L225 Difference]: With dead ends: 181 [2018-10-24 12:00:26,165 INFO L226 Difference]: Without dead ends: 179 [2018-10-24 12:00:26,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1399, Invalid=2383, Unknown=0, NotChecked=0, Total=3782 [2018-10-24 12:00:26,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-24 12:00:26,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 172. [2018-10-24 12:00:26,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-10-24 12:00:26,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2018-10-24 12:00:26,200 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 167 [2018-10-24 12:00:26,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:26,200 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2018-10-24 12:00:26,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-24 12:00:26,200 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2018-10-24 12:00:26,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-10-24 12:00:26,201 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:26,201 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 27, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:26,202 INFO L424 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:26,202 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:26,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1982241826, now seen corresponding path program 53 times [2018-10-24 12:00:26,202 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:26,202 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:26,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:26,203 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:26,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:26,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:27,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 1485 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:27,613 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:27,613 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:27,623 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 12:00:27,733 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-24 12:00:27,733 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:27,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:29,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 1485 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:29,042 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:29,042 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 87 [2018-10-24 12:00:29,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-24 12:00:29,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-24 12:00:29,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1739, Invalid=5743, Unknown=0, NotChecked=0, Total=7482 [2018-10-24 12:00:29,043 INFO L87 Difference]: Start difference. First operand 172 states and 173 transitions. Second operand 87 states. [2018-10-24 12:00:30,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:30,883 INFO L93 Difference]: Finished difference Result 291 states and 293 transitions. [2018-10-24 12:00:30,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-24 12:00:30,883 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 171 [2018-10-24 12:00:30,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:30,884 INFO L225 Difference]: With dead ends: 291 [2018-10-24 12:00:30,884 INFO L226 Difference]: Without dead ends: 174 [2018-10-24 12:00:30,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2674 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3073, Invalid=10267, Unknown=0, NotChecked=0, Total=13340 [2018-10-24 12:00:30,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-10-24 12:00:30,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2018-10-24 12:00:30,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-10-24 12:00:30,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2018-10-24 12:00:30,928 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 171 [2018-10-24 12:00:30,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:30,928 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2018-10-24 12:00:30,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-24 12:00:30,928 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2018-10-24 12:00:30,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-24 12:00:30,929 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:30,929 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 27, 27, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:30,929 INFO L424 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:30,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:30,930 INFO L82 PathProgramCache]: Analyzing trace with hash -392061220, now seen corresponding path program 54 times [2018-10-24 12:00:30,930 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:30,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:30,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:30,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:30,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:30,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:31,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2297 backedges. 812 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:31,396 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:31,396 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:31,406 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 12:00:31,509 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2018-10-24 12:00:31,510 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:31,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:31,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2297 backedges. 812 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:31,605 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:31,605 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2018-10-24 12:00:31,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-24 12:00:31,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-24 12:00:31,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2018-10-24 12:00:31,606 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand 34 states. [2018-10-24 12:00:32,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:32,483 INFO L93 Difference]: Finished difference Result 187 states and 188 transitions. [2018-10-24 12:00:32,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-24 12:00:32,484 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 173 [2018-10-24 12:00:32,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:32,485 INFO L225 Difference]: With dead ends: 187 [2018-10-24 12:00:32,485 INFO L226 Difference]: Without dead ends: 185 [2018-10-24 12:00:32,485 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1492, Invalid=2540, Unknown=0, NotChecked=0, Total=4032 [2018-10-24 12:00:32,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-10-24 12:00:32,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 178. [2018-10-24 12:00:32,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-10-24 12:00:32,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 179 transitions. [2018-10-24 12:00:32,528 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 179 transitions. Word has length 173 [2018-10-24 12:00:32,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:32,528 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 179 transitions. [2018-10-24 12:00:32,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-24 12:00:32,528 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 179 transitions. [2018-10-24 12:00:32,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-10-24 12:00:32,529 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:32,529 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:32,529 INFO L424 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:32,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:32,529 INFO L82 PathProgramCache]: Analyzing trace with hash 2007307685, now seen corresponding path program 55 times [2018-10-24 12:00:32,530 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:32,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:32,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:32,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:32,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:32,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:33,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 1596 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:33,747 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:33,748 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:33,758 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:00:33,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:33,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:35,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 1596 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:35,363 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:35,363 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 90 [2018-10-24 12:00:35,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-24 12:00:35,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-24 12:00:35,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1859, Invalid=6151, Unknown=0, NotChecked=0, Total=8010 [2018-10-24 12:00:35,364 INFO L87 Difference]: Start difference. First operand 178 states and 179 transitions. Second operand 90 states. [2018-10-24 12:00:36,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:36,837 INFO L93 Difference]: Finished difference Result 301 states and 303 transitions. [2018-10-24 12:00:36,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-24 12:00:36,837 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 177 [2018-10-24 12:00:36,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:36,838 INFO L225 Difference]: With dead ends: 301 [2018-10-24 12:00:36,838 INFO L226 Difference]: Without dead ends: 180 [2018-10-24 12:00:36,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2871 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3284, Invalid=10996, Unknown=0, NotChecked=0, Total=14280 [2018-10-24 12:00:36,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-10-24 12:00:36,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2018-10-24 12:00:36,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-10-24 12:00:36,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2018-10-24 12:00:36,881 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 177 [2018-10-24 12:00:36,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:36,881 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2018-10-24 12:00:36,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-24 12:00:36,881 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2018-10-24 12:00:36,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-10-24 12:00:36,882 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:36,882 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 28, 28, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:36,883 INFO L424 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:36,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:36,883 INFO L82 PathProgramCache]: Analyzing trace with hash 496870623, now seen corresponding path program 56 times [2018-10-24 12:00:36,883 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:36,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:36,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:36,884 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:00:36,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:36,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:37,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2466 backedges. 870 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:37,638 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:37,638 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:37,646 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 12:00:37,717 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 12:00:37,717 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:37,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:37,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2466 backedges. 870 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:37,840 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:37,840 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2018-10-24 12:00:37,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-24 12:00:37,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-24 12:00:37,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2018-10-24 12:00:37,841 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand 35 states. [2018-10-24 12:00:38,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:38,579 INFO L93 Difference]: Finished difference Result 193 states and 194 transitions. [2018-10-24 12:00:38,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-24 12:00:38,580 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 179 [2018-10-24 12:00:38,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:38,581 INFO L225 Difference]: With dead ends: 193 [2018-10-24 12:00:38,581 INFO L226 Difference]: Without dead ends: 191 [2018-10-24 12:00:38,581 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1588, Invalid=2702, Unknown=0, NotChecked=0, Total=4290 [2018-10-24 12:00:38,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-24 12:00:38,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 184. [2018-10-24 12:00:38,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-10-24 12:00:38,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2018-10-24 12:00:38,624 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 179 [2018-10-24 12:00:38,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:38,624 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2018-10-24 12:00:38,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-24 12:00:38,624 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2018-10-24 12:00:38,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-10-24 12:00:38,625 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:38,625 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 29, 29, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:38,625 INFO L424 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:38,626 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:38,626 INFO L82 PathProgramCache]: Analyzing trace with hash 592994856, now seen corresponding path program 57 times [2018-10-24 12:00:38,626 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:38,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:38,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:38,627 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:38,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:38,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:39,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2581 backedges. 1711 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:39,880 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:39,880 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:39,888 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:00:40,002 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-24 12:00:40,002 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:40,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:41,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2581 backedges. 1711 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:41,598 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:41,599 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 93 [2018-10-24 12:00:41,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-24 12:00:41,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-24 12:00:41,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1983, Invalid=6573, Unknown=0, NotChecked=0, Total=8556 [2018-10-24 12:00:41,600 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand 93 states. [2018-10-24 12:00:44,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:44,059 INFO L93 Difference]: Finished difference Result 311 states and 313 transitions. [2018-10-24 12:00:44,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-24 12:00:44,059 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 183 [2018-10-24 12:00:44,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:44,061 INFO L225 Difference]: With dead ends: 311 [2018-10-24 12:00:44,061 INFO L226 Difference]: Without dead ends: 186 [2018-10-24 12:00:44,062 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3075 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3502, Invalid=11750, Unknown=0, NotChecked=0, Total=15252 [2018-10-24 12:00:44,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-10-24 12:00:44,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2018-10-24 12:00:44,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2018-10-24 12:00:44,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 187 transitions. [2018-10-24 12:00:44,106 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 187 transitions. Word has length 183 [2018-10-24 12:00:44,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:44,106 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 187 transitions. [2018-10-24 12:00:44,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-24 12:00:44,106 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 187 transitions. [2018-10-24 12:00:44,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-10-24 12:00:44,107 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:44,107 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:44,107 INFO L424 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:44,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:44,107 INFO L82 PathProgramCache]: Analyzing trace with hash 110304738, now seen corresponding path program 58 times [2018-10-24 12:00:44,107 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:44,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:44,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:44,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:44,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:44,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:44,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2641 backedges. 930 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:44,859 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:44,859 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:44,867 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:00:44,951 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:00:44,951 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:44,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:45,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2641 backedges. 930 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:45,091 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:45,092 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2018-10-24 12:00:45,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-24 12:00:45,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-24 12:00:45,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2018-10-24 12:00:45,092 INFO L87 Difference]: Start difference. First operand 186 states and 187 transitions. Second operand 36 states. [2018-10-24 12:00:45,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:45,819 INFO L93 Difference]: Finished difference Result 199 states and 200 transitions. [2018-10-24 12:00:45,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-24 12:00:45,819 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 185 [2018-10-24 12:00:45,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:45,820 INFO L225 Difference]: With dead ends: 199 [2018-10-24 12:00:45,820 INFO L226 Difference]: Without dead ends: 197 [2018-10-24 12:00:45,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1687, Invalid=2869, Unknown=0, NotChecked=0, Total=4556 [2018-10-24 12:00:45,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-10-24 12:00:45,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 190. [2018-10-24 12:00:45,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-10-24 12:00:45,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2018-10-24 12:00:45,864 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 185 [2018-10-24 12:00:45,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:45,864 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2018-10-24 12:00:45,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-24 12:00:45,864 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2018-10-24 12:00:45,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-10-24 12:00:45,865 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:45,865 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:45,865 INFO L424 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:45,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:45,866 INFO L82 PathProgramCache]: Analyzing trace with hash 856924587, now seen corresponding path program 59 times [2018-10-24 12:00:45,866 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:45,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:45,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:45,866 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:45,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:45,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:47,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2760 backedges. 1830 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:47,408 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:47,408 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:47,415 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 12:00:47,534 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-24 12:00:47,534 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:47,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:49,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2760 backedges. 1830 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:49,363 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:49,363 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 96 [2018-10-24 12:00:49,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-24 12:00:49,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-24 12:00:49,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2111, Invalid=7009, Unknown=0, NotChecked=0, Total=9120 [2018-10-24 12:00:49,364 INFO L87 Difference]: Start difference. First operand 190 states and 191 transitions. Second operand 96 states. [2018-10-24 12:00:51,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:51,098 INFO L93 Difference]: Finished difference Result 321 states and 323 transitions. [2018-10-24 12:00:51,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-24 12:00:51,098 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 189 [2018-10-24 12:00:51,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:51,099 INFO L225 Difference]: With dead ends: 321 [2018-10-24 12:00:51,099 INFO L226 Difference]: Without dead ends: 192 [2018-10-24 12:00:51,100 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3286 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3727, Invalid=12529, Unknown=0, NotChecked=0, Total=16256 [2018-10-24 12:00:51,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-10-24 12:00:51,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2018-10-24 12:00:51,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-10-24 12:00:51,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 193 transitions. [2018-10-24 12:00:51,155 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 193 transitions. Word has length 189 [2018-10-24 12:00:51,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:51,155 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 193 transitions. [2018-10-24 12:00:51,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-24 12:00:51,155 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 193 transitions. [2018-10-24 12:00:51,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-10-24 12:00:51,156 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:51,157 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 30, 30, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:51,157 INFO L424 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:51,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:51,157 INFO L82 PathProgramCache]: Analyzing trace with hash -547542555, now seen corresponding path program 60 times [2018-10-24 12:00:51,157 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:51,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:51,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:51,158 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:51,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:51,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:51,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2822 backedges. 992 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:51,883 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:51,883 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:51,894 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 12:00:52,032 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-10-24 12:00:52,032 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:52,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:52,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2822 backedges. 992 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:52,108 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:52,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2018-10-24 12:00:52,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-24 12:00:52,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-24 12:00:52,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2018-10-24 12:00:52,109 INFO L87 Difference]: Start difference. First operand 192 states and 193 transitions. Second operand 37 states. [2018-10-24 12:00:53,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:53,098 INFO L93 Difference]: Finished difference Result 205 states and 206 transitions. [2018-10-24 12:00:53,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-24 12:00:53,099 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 191 [2018-10-24 12:00:53,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:53,100 INFO L225 Difference]: With dead ends: 205 [2018-10-24 12:00:53,101 INFO L226 Difference]: Without dead ends: 203 [2018-10-24 12:00:53,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1789, Invalid=3041, Unknown=0, NotChecked=0, Total=4830 [2018-10-24 12:00:53,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-10-24 12:00:53,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 196. [2018-10-24 12:00:53,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-10-24 12:00:53,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 197 transitions. [2018-10-24 12:00:53,151 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 197 transitions. Word has length 191 [2018-10-24 12:00:53,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:53,151 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 197 transitions. [2018-10-24 12:00:53,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-24 12:00:53,151 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 197 transitions. [2018-10-24 12:00:53,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-10-24 12:00:53,152 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:53,152 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 31, 31, 31, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:53,152 INFO L424 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:53,153 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:53,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1075967022, now seen corresponding path program 61 times [2018-10-24 12:00:53,153 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:53,153 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:53,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:53,154 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:53,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:53,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:54,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2945 backedges. 1953 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:54,573 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:54,573 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:54,581 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:00:54,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:54,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:56,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2945 backedges. 1953 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:56,424 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:56,424 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 99 [2018-10-24 12:00:56,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-24 12:00:56,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-24 12:00:56,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2243, Invalid=7459, Unknown=0, NotChecked=0, Total=9702 [2018-10-24 12:00:56,426 INFO L87 Difference]: Start difference. First operand 196 states and 197 transitions. Second operand 99 states. [2018-10-24 12:00:58,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:58,983 INFO L93 Difference]: Finished difference Result 331 states and 333 transitions. [2018-10-24 12:00:58,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-24 12:00:58,983 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 195 [2018-10-24 12:00:58,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:58,984 INFO L225 Difference]: With dead ends: 331 [2018-10-24 12:00:58,984 INFO L226 Difference]: Without dead ends: 198 [2018-10-24 12:00:58,985 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3504 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3959, Invalid=13333, Unknown=0, NotChecked=0, Total=17292 [2018-10-24 12:00:58,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-10-24 12:00:59,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2018-10-24 12:00:59,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2018-10-24 12:00:59,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 199 transitions. [2018-10-24 12:00:59,027 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 199 transitions. Word has length 195 [2018-10-24 12:00:59,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:59,028 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 199 transitions. [2018-10-24 12:00:59,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-24 12:00:59,028 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 199 transitions. [2018-10-24 12:00:59,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-10-24 12:00:59,029 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:59,029 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 31, 31, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:59,029 INFO L424 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:59,029 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:59,030 INFO L82 PathProgramCache]: Analyzing trace with hash 491710696, now seen corresponding path program 62 times [2018-10-24 12:00:59,030 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:59,030 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:59,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:59,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:00:59,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:59,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:59,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3009 backedges. 1056 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:59,602 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:59,602 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:00:59,611 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 12:00:59,702 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 12:00:59,702 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:59,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:59,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3009 backedges. 1056 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:59,806 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:59,807 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2018-10-24 12:00:59,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-24 12:00:59,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-24 12:00:59,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2018-10-24 12:00:59,808 INFO L87 Difference]: Start difference. First operand 198 states and 199 transitions. Second operand 38 states. [2018-10-24 12:01:00,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:00,619 INFO L93 Difference]: Finished difference Result 211 states and 212 transitions. [2018-10-24 12:01:00,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-24 12:01:00,620 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 197 [2018-10-24 12:01:00,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:00,621 INFO L225 Difference]: With dead ends: 211 [2018-10-24 12:01:00,621 INFO L226 Difference]: Without dead ends: 209 [2018-10-24 12:01:00,622 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1894, Invalid=3218, Unknown=0, NotChecked=0, Total=5112 [2018-10-24 12:01:00,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-10-24 12:01:00,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 202. [2018-10-24 12:01:00,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-10-24 12:01:00,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 203 transitions. [2018-10-24 12:01:00,666 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 203 transitions. Word has length 197 [2018-10-24 12:01:00,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:00,666 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 203 transitions. [2018-10-24 12:01:00,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-24 12:01:00,666 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 203 transitions. [2018-10-24 12:01:00,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-10-24 12:01:00,667 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:00,668 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 32, 32, 32, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:00,668 INFO L424 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:00,668 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:00,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1589216847, now seen corresponding path program 63 times [2018-10-24 12:01:00,668 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:00,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:00,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:00,669 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:00,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:00,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:02,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 2080 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:02,523 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:02,523 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:02,532 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:01:02,680 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-24 12:01:02,680 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:02,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:04,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 2080 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:04,681 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:04,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 102 [2018-10-24 12:01:04,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-24 12:01:04,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-24 12:01:04,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2379, Invalid=7923, Unknown=0, NotChecked=0, Total=10302 [2018-10-24 12:01:04,682 INFO L87 Difference]: Start difference. First operand 202 states and 203 transitions. Second operand 102 states. [2018-10-24 12:01:07,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:07,221 INFO L93 Difference]: Finished difference Result 341 states and 343 transitions. [2018-10-24 12:01:07,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-24 12:01:07,221 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 201 [2018-10-24 12:01:07,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:07,222 INFO L225 Difference]: With dead ends: 341 [2018-10-24 12:01:07,222 INFO L226 Difference]: Without dead ends: 204 [2018-10-24 12:01:07,223 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3729 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4198, Invalid=14162, Unknown=0, NotChecked=0, Total=18360 [2018-10-24 12:01:07,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-10-24 12:01:07,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2018-10-24 12:01:07,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2018-10-24 12:01:07,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2018-10-24 12:01:07,268 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 201 [2018-10-24 12:01:07,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:07,268 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2018-10-24 12:01:07,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-24 12:01:07,268 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2018-10-24 12:01:07,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-10-24 12:01:07,269 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:07,269 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 32, 32, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:07,269 INFO L424 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:07,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:07,270 INFO L82 PathProgramCache]: Analyzing trace with hash -852264213, now seen corresponding path program 64 times [2018-10-24 12:01:07,270 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:07,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:07,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:07,271 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:07,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:07,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:08,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3202 backedges. 1122 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:08,173 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:08,173 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:08,182 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:01:08,272 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:01:08,272 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:08,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:08,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3202 backedges. 1122 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:08,631 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:08,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2018-10-24 12:01:08,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-24 12:01:08,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-24 12:01:08,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2018-10-24 12:01:08,632 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand 39 states. [2018-10-24 12:01:09,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:09,488 INFO L93 Difference]: Finished difference Result 217 states and 218 transitions. [2018-10-24 12:01:09,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-24 12:01:09,488 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 203 [2018-10-24 12:01:09,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:09,489 INFO L225 Difference]: With dead ends: 217 [2018-10-24 12:01:09,489 INFO L226 Difference]: Without dead ends: 215 [2018-10-24 12:01:09,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1257 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2002, Invalid=3400, Unknown=0, NotChecked=0, Total=5402 [2018-10-24 12:01:09,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-10-24 12:01:09,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 208. [2018-10-24 12:01:09,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-10-24 12:01:09,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 209 transitions. [2018-10-24 12:01:09,538 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 209 transitions. Word has length 203 [2018-10-24 12:01:09,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:09,538 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 209 transitions. [2018-10-24 12:01:09,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-24 12:01:09,538 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 209 transitions. [2018-10-24 12:01:09,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-10-24 12:01:09,539 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:09,539 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 34, 33, 33, 33, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:09,539 INFO L424 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:09,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:09,540 INFO L82 PathProgramCache]: Analyzing trace with hash -927182284, now seen corresponding path program 65 times [2018-10-24 12:01:09,540 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:09,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:09,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:09,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:09,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:09,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:11,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3333 backedges. 2211 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:11,468 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:11,468 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:11,478 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 12:01:11,616 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-24 12:01:11,616 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:11,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:13,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3333 backedges. 2211 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:13,880 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:13,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 105 [2018-10-24 12:01:13,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-10-24 12:01:13,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-10-24 12:01:13,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2519, Invalid=8401, Unknown=0, NotChecked=0, Total=10920 [2018-10-24 12:01:13,882 INFO L87 Difference]: Start difference. First operand 208 states and 209 transitions. Second operand 105 states. [2018-10-24 12:01:16,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:16,583 INFO L93 Difference]: Finished difference Result 351 states and 353 transitions. [2018-10-24 12:01:16,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-24 12:01:16,583 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 207 [2018-10-24 12:01:16,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:16,584 INFO L225 Difference]: With dead ends: 351 [2018-10-24 12:01:16,584 INFO L226 Difference]: Without dead ends: 210 [2018-10-24 12:01:16,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3961 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=4444, Invalid=15016, Unknown=0, NotChecked=0, Total=19460 [2018-10-24 12:01:16,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-10-24 12:01:16,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2018-10-24 12:01:16,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-10-24 12:01:16,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 211 transitions. [2018-10-24 12:01:16,636 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 211 transitions. Word has length 207 [2018-10-24 12:01:16,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:16,637 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 211 transitions. [2018-10-24 12:01:16,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-10-24 12:01:16,637 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 211 transitions. [2018-10-24 12:01:16,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-10-24 12:01:16,637 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:16,638 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 33, 33, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:16,638 INFO L424 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:16,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:16,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1900937198, now seen corresponding path program 66 times [2018-10-24 12:01:16,638 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:16,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:16,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:16,639 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:16,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:16,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:17,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3401 backedges. 1190 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:17,298 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:17,298 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:17,305 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 12:01:17,440 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2018-10-24 12:01:17,440 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:17,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:17,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3401 backedges. 1190 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:17,551 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:17,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2018-10-24 12:01:17,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-24 12:01:17,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-24 12:01:17,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2018-10-24 12:01:17,553 INFO L87 Difference]: Start difference. First operand 210 states and 211 transitions. Second operand 40 states. [2018-10-24 12:01:18,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:18,610 INFO L93 Difference]: Finished difference Result 223 states and 224 transitions. [2018-10-24 12:01:18,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-24 12:01:18,610 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 209 [2018-10-24 12:01:18,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:18,612 INFO L225 Difference]: With dead ends: 223 [2018-10-24 12:01:18,612 INFO L226 Difference]: Without dead ends: 221 [2018-10-24 12:01:18,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2113, Invalid=3587, Unknown=0, NotChecked=0, Total=5700 [2018-10-24 12:01:18,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-10-24 12:01:18,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 214. [2018-10-24 12:01:18,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-10-24 12:01:18,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 215 transitions. [2018-10-24 12:01:18,663 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 215 transitions. Word has length 209 [2018-10-24 12:01:18,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:18,663 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 215 transitions. [2018-10-24 12:01:18,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-24 12:01:18,663 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 215 transitions. [2018-10-24 12:01:18,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-10-24 12:01:18,664 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:18,664 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:18,664 INFO L424 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:18,665 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:18,665 INFO L82 PathProgramCache]: Analyzing trace with hash 574004663, now seen corresponding path program 67 times [2018-10-24 12:01:18,665 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:18,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:18,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:18,666 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:18,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:18,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:20,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3536 backedges. 2346 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:20,375 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:20,375 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:20,384 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:01:20,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:20,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:22,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3536 backedges. 2346 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:22,515 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:22,515 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 108 [2018-10-24 12:01:22,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-24 12:01:22,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-24 12:01:22,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2663, Invalid=8893, Unknown=0, NotChecked=0, Total=11556 [2018-10-24 12:01:22,517 INFO L87 Difference]: Start difference. First operand 214 states and 215 transitions. Second operand 108 states. [2018-10-24 12:01:25,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:25,590 INFO L93 Difference]: Finished difference Result 361 states and 363 transitions. [2018-10-24 12:01:25,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-24 12:01:25,590 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 213 [2018-10-24 12:01:25,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:25,591 INFO L225 Difference]: With dead ends: 361 [2018-10-24 12:01:25,591 INFO L226 Difference]: Without dead ends: 216 [2018-10-24 12:01:25,592 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4200 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=4697, Invalid=15895, Unknown=0, NotChecked=0, Total=20592 [2018-10-24 12:01:25,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-10-24 12:01:25,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2018-10-24 12:01:25,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2018-10-24 12:01:25,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 217 transitions. [2018-10-24 12:01:25,641 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 217 transitions. Word has length 213 [2018-10-24 12:01:25,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:25,642 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 217 transitions. [2018-10-24 12:01:25,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-24 12:01:25,642 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 217 transitions. [2018-10-24 12:01:25,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-10-24 12:01:25,643 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:25,643 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 34, 34, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:25,643 INFO L424 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:25,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:25,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1599707121, now seen corresponding path program 68 times [2018-10-24 12:01:25,644 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:25,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:25,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:25,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:01:25,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:25,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:26,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3606 backedges. 1260 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:26,367 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:26,367 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:26,375 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 12:01:26,468 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 12:01:26,468 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:26,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:26,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3606 backedges. 1260 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:26,577 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:26,577 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2018-10-24 12:01:26,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-24 12:01:26,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-24 12:01:26,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=894, Unknown=0, NotChecked=0, Total=1640 [2018-10-24 12:01:26,578 INFO L87 Difference]: Start difference. First operand 216 states and 217 transitions. Second operand 41 states. [2018-10-24 12:01:27,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:27,524 INFO L93 Difference]: Finished difference Result 229 states and 230 transitions. [2018-10-24 12:01:27,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-24 12:01:27,524 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 215 [2018-10-24 12:01:27,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:27,525 INFO L225 Difference]: With dead ends: 229 [2018-10-24 12:01:27,525 INFO L226 Difference]: Without dead ends: 227 [2018-10-24 12:01:27,526 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2227, Invalid=3779, Unknown=0, NotChecked=0, Total=6006 [2018-10-24 12:01:27,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-10-24 12:01:27,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 220. [2018-10-24 12:01:27,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-10-24 12:01:27,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 221 transitions. [2018-10-24 12:01:27,578 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 221 transitions. Word has length 215 [2018-10-24 12:01:27,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:27,578 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 221 transitions. [2018-10-24 12:01:27,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-24 12:01:27,579 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 221 transitions. [2018-10-24 12:01:27,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-10-24 12:01:27,580 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:27,580 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 35, 35, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:27,580 INFO L424 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:27,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:27,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1893760058, now seen corresponding path program 69 times [2018-10-24 12:01:27,580 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:27,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:27,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:27,581 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:27,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:27,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:29,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3745 backedges. 2485 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:29,648 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:29,648 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:29,656 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:01:29,802 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-24 12:01:29,803 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:29,808 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:31,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3745 backedges. 2485 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:31,999 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:31,999 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 111 [2018-10-24 12:01:31,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-10-24 12:01:32,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-10-24 12:01:32,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2811, Invalid=9399, Unknown=0, NotChecked=0, Total=12210 [2018-10-24 12:01:32,001 INFO L87 Difference]: Start difference. First operand 220 states and 221 transitions. Second operand 111 states. [2018-10-24 12:01:35,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:35,319 INFO L93 Difference]: Finished difference Result 371 states and 373 transitions. [2018-10-24 12:01:35,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-24 12:01:35,319 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 219 [2018-10-24 12:01:35,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:35,320 INFO L225 Difference]: With dead ends: 371 [2018-10-24 12:01:35,320 INFO L226 Difference]: Without dead ends: 222 [2018-10-24 12:01:35,321 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4446 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=4957, Invalid=16799, Unknown=0, NotChecked=0, Total=21756 [2018-10-24 12:01:35,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2018-10-24 12:01:35,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2018-10-24 12:01:35,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2018-10-24 12:01:35,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 223 transitions. [2018-10-24 12:01:35,374 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 223 transitions. Word has length 219 [2018-10-24 12:01:35,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:35,374 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 223 transitions. [2018-10-24 12:01:35,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-10-24 12:01:35,374 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 223 transitions. [2018-10-24 12:01:35,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-10-24 12:01:35,375 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:35,375 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 35, 35, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:35,375 INFO L424 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:35,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:35,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1635163404, now seen corresponding path program 70 times [2018-10-24 12:01:35,375 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:35,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:35,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:35,376 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:35,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:35,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:36,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3817 backedges. 1332 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:36,124 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:36,124 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:36,131 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:01:36,233 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:01:36,233 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:36,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:36,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3817 backedges. 1332 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:36,355 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:36,355 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 42 [2018-10-24 12:01:36,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-24 12:01:36,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-24 12:01:36,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2018-10-24 12:01:36,357 INFO L87 Difference]: Start difference. First operand 222 states and 223 transitions. Second operand 42 states. [2018-10-24 12:01:37,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:37,325 INFO L93 Difference]: Finished difference Result 235 states and 236 transitions. [2018-10-24 12:01:37,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-24 12:01:37,326 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 221 [2018-10-24 12:01:37,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:37,327 INFO L225 Difference]: With dead ends: 235 [2018-10-24 12:01:37,327 INFO L226 Difference]: Without dead ends: 233 [2018-10-24 12:01:37,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1479 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2344, Invalid=3976, Unknown=0, NotChecked=0, Total=6320 [2018-10-24 12:01:37,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-10-24 12:01:37,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 226. [2018-10-24 12:01:37,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2018-10-24 12:01:37,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 227 transitions. [2018-10-24 12:01:37,383 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 227 transitions. Word has length 221 [2018-10-24 12:01:37,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:37,383 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 227 transitions. [2018-10-24 12:01:37,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-24 12:01:37,384 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 227 transitions. [2018-10-24 12:01:37,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2018-10-24 12:01:37,384 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:37,384 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 37, 36, 36, 36, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:37,385 INFO L424 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:37,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:37,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1386410563, now seen corresponding path program 71 times [2018-10-24 12:01:37,385 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:37,385 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:37,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:37,386 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:37,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:37,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:39,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 2628 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:39,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:39,812 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:39,820 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 12:01:39,980 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-24 12:01:39,980 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:39,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:42,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 2628 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:42,274 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:42,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 114 [2018-10-24 12:01:42,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-10-24 12:01:42,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-10-24 12:01:42,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2963, Invalid=9919, Unknown=0, NotChecked=0, Total=12882 [2018-10-24 12:01:42,275 INFO L87 Difference]: Start difference. First operand 226 states and 227 transitions. Second operand 114 states. [2018-10-24 12:01:45,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:45,638 INFO L93 Difference]: Finished difference Result 381 states and 383 transitions. [2018-10-24 12:01:45,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-24 12:01:45,638 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 225 [2018-10-24 12:01:45,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:45,639 INFO L225 Difference]: With dead ends: 381 [2018-10-24 12:01:45,639 INFO L226 Difference]: Without dead ends: 228 [2018-10-24 12:01:45,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4699 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=5224, Invalid=17728, Unknown=0, NotChecked=0, Total=22952 [2018-10-24 12:01:45,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-10-24 12:01:45,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2018-10-24 12:01:45,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2018-10-24 12:01:45,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 229 transitions. [2018-10-24 12:01:45,706 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 229 transitions. Word has length 225 [2018-10-24 12:01:45,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:45,706 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 229 transitions. [2018-10-24 12:01:45,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-10-24 12:01:45,706 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 229 transitions. [2018-10-24 12:01:45,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-10-24 12:01:45,707 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:45,707 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 36, 36, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:45,707 INFO L424 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:45,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:45,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1166573815, now seen corresponding path program 72 times [2018-10-24 12:01:45,708 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:45,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:45,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:45,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:45,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:45,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:46,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4034 backedges. 1406 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:46,447 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:46,448 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:46,455 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 12:01:46,610 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-10-24 12:01:46,611 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:46,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:46,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4034 backedges. 1406 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:46,717 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:46,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2018-10-24 12:01:46,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-24 12:01:46,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-24 12:01:46,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=981, Unknown=0, NotChecked=0, Total=1806 [2018-10-24 12:01:46,718 INFO L87 Difference]: Start difference. First operand 228 states and 229 transitions. Second operand 43 states. [2018-10-24 12:01:47,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:47,716 INFO L93 Difference]: Finished difference Result 241 states and 242 transitions. [2018-10-24 12:01:47,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-24 12:01:47,717 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 227 [2018-10-24 12:01:47,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:47,718 INFO L225 Difference]: With dead ends: 241 [2018-10-24 12:01:47,718 INFO L226 Difference]: Without dead ends: 239 [2018-10-24 12:01:47,719 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1557 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2464, Invalid=4178, Unknown=0, NotChecked=0, Total=6642 [2018-10-24 12:01:47,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-10-24 12:01:47,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 232. [2018-10-24 12:01:47,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-10-24 12:01:47,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 233 transitions. [2018-10-24 12:01:47,776 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 233 transitions. Word has length 227 [2018-10-24 12:01:47,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:47,777 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 233 transitions. [2018-10-24 12:01:47,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-24 12:01:47,777 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 233 transitions. [2018-10-24 12:01:47,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-10-24 12:01:47,778 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:47,778 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 37, 37, 37, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:47,778 INFO L424 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:47,778 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:47,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1674015296, now seen corresponding path program 73 times [2018-10-24 12:01:47,778 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:47,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:47,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:47,779 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:47,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:47,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:49,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4181 backedges. 2775 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:49,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:49,967 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:49,975 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:01:50,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:50,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:52,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4181 backedges. 2775 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:52,469 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:52,469 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 117 [2018-10-24 12:01:52,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-10-24 12:01:52,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-10-24 12:01:52,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3119, Invalid=10453, Unknown=0, NotChecked=0, Total=13572 [2018-10-24 12:01:52,471 INFO L87 Difference]: Start difference. First operand 232 states and 233 transitions. Second operand 117 states. [2018-10-24 12:01:56,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:56,087 INFO L93 Difference]: Finished difference Result 391 states and 393 transitions. [2018-10-24 12:01:56,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-24 12:01:56,087 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 231 [2018-10-24 12:01:56,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:56,088 INFO L225 Difference]: With dead ends: 391 [2018-10-24 12:01:56,088 INFO L226 Difference]: Without dead ends: 234 [2018-10-24 12:01:56,089 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4959 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=5498, Invalid=18682, Unknown=0, NotChecked=0, Total=24180 [2018-10-24 12:01:56,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-10-24 12:01:56,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2018-10-24 12:01:56,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2018-10-24 12:01:56,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 235 transitions. [2018-10-24 12:01:56,154 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 235 transitions. Word has length 231 [2018-10-24 12:01:56,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:56,155 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 235 transitions. [2018-10-24 12:01:56,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-10-24 12:01:56,155 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 235 transitions. [2018-10-24 12:01:56,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-10-24 12:01:56,155 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:56,156 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 37, 37, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:56,156 INFO L424 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:56,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:56,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1484395002, now seen corresponding path program 74 times [2018-10-24 12:01:56,156 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:56,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:56,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:56,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:01:56,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:56,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:56,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4257 backedges. 1482 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:56,946 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:56,946 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:01:56,953 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 12:01:57,049 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 12:01:57,049 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:57,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:57,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4257 backedges. 1482 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:57,183 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:57,183 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2018-10-24 12:01:57,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-24 12:01:57,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-24 12:01:57,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2018-10-24 12:01:57,184 INFO L87 Difference]: Start difference. First operand 234 states and 235 transitions. Second operand 44 states. [2018-10-24 12:01:58,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:58,240 INFO L93 Difference]: Finished difference Result 247 states and 248 transitions. [2018-10-24 12:01:58,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-24 12:01:58,240 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 233 [2018-10-24 12:01:58,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:58,241 INFO L225 Difference]: With dead ends: 247 [2018-10-24 12:01:58,242 INFO L226 Difference]: Without dead ends: 245 [2018-10-24 12:01:58,242 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1637 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2587, Invalid=4385, Unknown=0, NotChecked=0, Total=6972 [2018-10-24 12:01:58,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2018-10-24 12:01:58,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 238. [2018-10-24 12:01:58,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2018-10-24 12:01:58,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 239 transitions. [2018-10-24 12:01:58,303 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 239 transitions. Word has length 233 [2018-10-24 12:01:58,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:58,303 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 239 transitions. [2018-10-24 12:01:58,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-24 12:01:58,303 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 239 transitions. [2018-10-24 12:01:58,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-10-24 12:01:58,304 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:58,304 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 38, 38, 38, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:58,304 INFO L424 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:58,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:58,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1850553917, now seen corresponding path program 75 times [2018-10-24 12:01:58,305 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:58,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:58,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:58,305 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:58,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:58,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:02:00,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4408 backedges. 2926 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:00,856 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:02:00,856 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:02:00,864 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:02:01,023 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-10-24 12:02:01,023 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:02:01,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:02:03,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4408 backedges. 2926 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:03,477 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:02:03,477 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 120 [2018-10-24 12:02:03,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-10-24 12:02:03,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-10-24 12:02:03,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3279, Invalid=11001, Unknown=0, NotChecked=0, Total=14280 [2018-10-24 12:02:03,478 INFO L87 Difference]: Start difference. First operand 238 states and 239 transitions. Second operand 120 states. [2018-10-24 12:02:05,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:02:05,713 INFO L93 Difference]: Finished difference Result 401 states and 403 transitions. [2018-10-24 12:02:05,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-24 12:02:05,714 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 237 [2018-10-24 12:02:05,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:02:05,715 INFO L225 Difference]: With dead ends: 401 [2018-10-24 12:02:05,715 INFO L226 Difference]: Without dead ends: 240 [2018-10-24 12:02:05,716 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5226 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=5779, Invalid=19661, Unknown=0, NotChecked=0, Total=25440 [2018-10-24 12:02:05,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2018-10-24 12:02:05,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2018-10-24 12:02:05,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2018-10-24 12:02:05,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 241 transitions. [2018-10-24 12:02:05,776 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 241 transitions. Word has length 237 [2018-10-24 12:02:05,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:02:05,776 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 241 transitions. [2018-10-24 12:02:05,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-10-24 12:02:05,776 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 241 transitions. [2018-10-24 12:02:05,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2018-10-24 12:02:05,777 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:02:05,777 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 38, 38, 1, 1, 1, 1, 1, 1] [2018-10-24 12:02:05,777 INFO L424 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:02:05,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:02:05,778 INFO L82 PathProgramCache]: Analyzing trace with hash 653866493, now seen corresponding path program 76 times [2018-10-24 12:02:05,778 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:02:05,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:02:05,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:05,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:02:05,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:05,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:02:06,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4486 backedges. 1560 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:06,700 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:02:06,700 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:02:06,707 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:02:06,815 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:02:06,815 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:02:06,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:02:06,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4486 backedges. 1560 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:06,927 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:02:06,928 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2018-10-24 12:02:06,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-24 12:02:06,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-24 12:02:06,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=908, Invalid=1072, Unknown=0, NotChecked=0, Total=1980 [2018-10-24 12:02:06,929 INFO L87 Difference]: Start difference. First operand 240 states and 241 transitions. Second operand 45 states. [2018-10-24 12:02:08,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:02:08,077 INFO L93 Difference]: Finished difference Result 253 states and 254 transitions. [2018-10-24 12:02:08,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-24 12:02:08,077 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 239 [2018-10-24 12:02:08,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:02:08,078 INFO L225 Difference]: With dead ends: 253 [2018-10-24 12:02:08,079 INFO L226 Difference]: Without dead ends: 251 [2018-10-24 12:02:08,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2713, Invalid=4597, Unknown=0, NotChecked=0, Total=7310 [2018-10-24 12:02:08,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-10-24 12:02:08,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 244. [2018-10-24 12:02:08,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-10-24 12:02:08,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 245 transitions. [2018-10-24 12:02:08,143 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 245 transitions. Word has length 239 [2018-10-24 12:02:08,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:02:08,143 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 245 transitions. [2018-10-24 12:02:08,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-24 12:02:08,144 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 245 transitions. [2018-10-24 12:02:08,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-10-24 12:02:08,144 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:02:08,144 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 40, 39, 39, 39, 1, 1, 1, 1, 1, 1] [2018-10-24 12:02:08,145 INFO L424 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:02:08,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:02:08,145 INFO L82 PathProgramCache]: Analyzing trace with hash 69874758, now seen corresponding path program 77 times [2018-10-24 12:02:08,145 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:02:08,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:02:08,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:08,146 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:02:08,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:08,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:02:10,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4641 backedges. 3081 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:10,574 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:02:10,574 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:02:10,582 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 12:02:10,747 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-10-24 12:02:10,748 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:02:10,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:02:13,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4641 backedges. 3081 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:13,312 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:02:13,312 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 123 [2018-10-24 12:02:13,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 123 states [2018-10-24 12:02:13,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2018-10-24 12:02:13,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3443, Invalid=11563, Unknown=0, NotChecked=0, Total=15006 [2018-10-24 12:02:13,314 INFO L87 Difference]: Start difference. First operand 244 states and 245 transitions. Second operand 123 states. [2018-10-24 12:02:16,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:02:16,361 INFO L93 Difference]: Finished difference Result 411 states and 413 transitions. [2018-10-24 12:02:16,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-24 12:02:16,361 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 243 [2018-10-24 12:02:16,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:02:16,362 INFO L225 Difference]: With dead ends: 411 [2018-10-24 12:02:16,362 INFO L226 Difference]: Without dead ends: 246 [2018-10-24 12:02:16,364 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5500 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=6067, Invalid=20665, Unknown=0, NotChecked=0, Total=26732 [2018-10-24 12:02:16,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2018-10-24 12:02:16,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2018-10-24 12:02:16,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2018-10-24 12:02:16,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 247 transitions. [2018-10-24 12:02:16,426 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 247 transitions. Word has length 243 [2018-10-24 12:02:16,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:02:16,426 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 247 transitions. [2018-10-24 12:02:16,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 123 states. [2018-10-24 12:02:16,426 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 247 transitions. [2018-10-24 12:02:16,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2018-10-24 12:02:16,427 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:02:16,427 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 39, 39, 1, 1, 1, 1, 1, 1] [2018-10-24 12:02:16,427 INFO L424 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:02:16,427 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:02:16,428 INFO L82 PathProgramCache]: Analyzing trace with hash 706284800, now seen corresponding path program 78 times [2018-10-24 12:02:16,428 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:02:16,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:02:16,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:16,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:02:16,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:16,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:02:17,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4721 backedges. 1640 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:17,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:02:17,312 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:02:17,319 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 12:02:17,500 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2018-10-24 12:02:17,500 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:02:17,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:02:17,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4721 backedges. 1640 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:17,683 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:02:17,683 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2018-10-24 12:02:17,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-24 12:02:17,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-24 12:02:17,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2018-10-24 12:02:17,684 INFO L87 Difference]: Start difference. First operand 246 states and 247 transitions. Second operand 46 states. [2018-10-24 12:02:18,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:02:18,858 INFO L93 Difference]: Finished difference Result 259 states and 260 transitions. [2018-10-24 12:02:18,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-24 12:02:18,859 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 245 [2018-10-24 12:02:18,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:02:18,860 INFO L225 Difference]: With dead ends: 259 [2018-10-24 12:02:18,860 INFO L226 Difference]: Without dead ends: 257 [2018-10-24 12:02:18,861 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1803 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2842, Invalid=4814, Unknown=0, NotChecked=0, Total=7656 [2018-10-24 12:02:18,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2018-10-24 12:02:18,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 250. [2018-10-24 12:02:18,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2018-10-24 12:02:18,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 251 transitions. [2018-10-24 12:02:18,928 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 251 transitions. Word has length 245 [2018-10-24 12:02:18,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:02:18,928 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 251 transitions. [2018-10-24 12:02:18,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-24 12:02:18,928 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 251 transitions. [2018-10-24 12:02:18,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2018-10-24 12:02:18,929 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:02:18,929 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 40, 40, 40, 1, 1, 1, 1, 1, 1] [2018-10-24 12:02:18,929 INFO L424 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:02:18,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:02:18,929 INFO L82 PathProgramCache]: Analyzing trace with hash 900780489, now seen corresponding path program 79 times [2018-10-24 12:02:18,929 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:02:18,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:02:18,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:18,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:02:18,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:18,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:02:21,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4880 backedges. 3240 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:21,283 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:02:21,283 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:02:21,290 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:02:21,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:02:21,400 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:02:24,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4880 backedges. 3240 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:24,097 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:02:24,097 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 126 [2018-10-24 12:02:24,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-10-24 12:02:24,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-10-24 12:02:24,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3611, Invalid=12139, Unknown=0, NotChecked=0, Total=15750 [2018-10-24 12:02:24,099 INFO L87 Difference]: Start difference. First operand 250 states and 251 transitions. Second operand 126 states. [2018-10-24 12:02:26,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:02:26,962 INFO L93 Difference]: Finished difference Result 421 states and 423 transitions. [2018-10-24 12:02:26,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-24 12:02:26,962 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 249 [2018-10-24 12:02:26,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:02:26,963 INFO L225 Difference]: With dead ends: 421 [2018-10-24 12:02:26,964 INFO L226 Difference]: Without dead ends: 252 [2018-10-24 12:02:26,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5781 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=6362, Invalid=21694, Unknown=0, NotChecked=0, Total=28056 [2018-10-24 12:02:26,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2018-10-24 12:02:27,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2018-10-24 12:02:27,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2018-10-24 12:02:27,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 253 transitions. [2018-10-24 12:02:27,031 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 253 transitions. Word has length 249 [2018-10-24 12:02:27,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:02:27,032 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 253 transitions. [2018-10-24 12:02:27,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-10-24 12:02:27,032 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 253 transitions. [2018-10-24 12:02:27,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-10-24 12:02:27,033 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:02:27,033 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 40, 40, 1, 1, 1, 1, 1, 1] [2018-10-24 12:02:27,033 INFO L424 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:02:27,033 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:02:27,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1650767619, now seen corresponding path program 80 times [2018-10-24 12:02:27,033 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:02:27,033 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:02:27,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:27,034 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:02:27,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:27,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:02:27,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4962 backedges. 1722 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:27,923 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:02:27,923 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:02:27,930 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 12:02:28,031 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 12:02:28,031 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:02:28,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:02:28,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4962 backedges. 1722 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:28,149 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:02:28,149 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2018-10-24 12:02:28,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-24 12:02:28,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-24 12:02:28,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=995, Invalid=1167, Unknown=0, NotChecked=0, Total=2162 [2018-10-24 12:02:28,150 INFO L87 Difference]: Start difference. First operand 252 states and 253 transitions. Second operand 47 states. [2018-10-24 12:02:29,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:02:29,280 INFO L93 Difference]: Finished difference Result 265 states and 266 transitions. [2018-10-24 12:02:29,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-24 12:02:29,280 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 251 [2018-10-24 12:02:29,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:02:29,281 INFO L225 Difference]: With dead ends: 265 [2018-10-24 12:02:29,281 INFO L226 Difference]: Without dead ends: 263 [2018-10-24 12:02:29,282 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1889 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2974, Invalid=5036, Unknown=0, NotChecked=0, Total=8010 [2018-10-24 12:02:29,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-10-24 12:02:29,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 256. [2018-10-24 12:02:29,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-10-24 12:02:29,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 257 transitions. [2018-10-24 12:02:29,351 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 257 transitions. Word has length 251 [2018-10-24 12:02:29,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:02:29,351 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 257 transitions. [2018-10-24 12:02:29,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-24 12:02:29,352 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 257 transitions. [2018-10-24 12:02:29,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-10-24 12:02:29,352 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:02:29,352 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 41, 41, 41, 1, 1, 1, 1, 1, 1] [2018-10-24 12:02:29,353 INFO L424 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:02:29,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:02:29,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1404976564, now seen corresponding path program 81 times [2018-10-24 12:02:29,353 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:02:29,353 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:02:29,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:29,354 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:02:29,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:29,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:02:31,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5125 backedges. 3403 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:31,757 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:02:31,757 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:02:31,766 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:02:31,937 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-10-24 12:02:31,937 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:02:31,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:02:34,719 INFO L134 CoverageAnalysis]: Checked inductivity of 5125 backedges. 3403 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:34,740 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:02:34,740 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 129 [2018-10-24 12:02:34,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 129 states [2018-10-24 12:02:34,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2018-10-24 12:02:34,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3783, Invalid=12729, Unknown=0, NotChecked=0, Total=16512 [2018-10-24 12:02:34,742 INFO L87 Difference]: Start difference. First operand 256 states and 257 transitions. Second operand 129 states. [2018-10-24 12:02:37,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:02:37,749 INFO L93 Difference]: Finished difference Result 431 states and 433 transitions. [2018-10-24 12:02:37,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-24 12:02:37,750 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 255 [2018-10-24 12:02:37,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:02:37,751 INFO L225 Difference]: With dead ends: 431 [2018-10-24 12:02:37,751 INFO L226 Difference]: Without dead ends: 258 [2018-10-24 12:02:37,752 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6069 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=6664, Invalid=22748, Unknown=0, NotChecked=0, Total=29412 [2018-10-24 12:02:37,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-10-24 12:02:37,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2018-10-24 12:02:37,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2018-10-24 12:02:37,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 259 transitions. [2018-10-24 12:02:37,828 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 259 transitions. Word has length 255 [2018-10-24 12:02:37,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:02:37,829 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 259 transitions. [2018-10-24 12:02:37,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 129 states. [2018-10-24 12:02:37,829 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 259 transitions. [2018-10-24 12:02:37,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-10-24 12:02:37,830 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:02:37,830 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 41, 41, 1, 1, 1, 1, 1, 1] [2018-10-24 12:02:37,830 INFO L424 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:02:37,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:02:37,830 INFO L82 PathProgramCache]: Analyzing trace with hash 903828486, now seen corresponding path program 82 times [2018-10-24 12:02:37,830 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:02:37,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:02:37,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:37,831 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:02:37,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:37,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:02:38,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5209 backedges. 1806 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:38,701 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:02:38,701 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:02:38,709 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:02:38,819 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:02:38,819 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:02:38,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:02:38,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5209 backedges. 1806 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:38,934 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:02:38,934 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 48 [2018-10-24 12:02:38,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-24 12:02:38,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-24 12:02:38,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2018-10-24 12:02:38,935 INFO L87 Difference]: Start difference. First operand 258 states and 259 transitions. Second operand 48 states. [2018-10-24 12:02:40,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:02:40,137 INFO L93 Difference]: Finished difference Result 271 states and 272 transitions. [2018-10-24 12:02:40,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-24 12:02:40,137 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 257 [2018-10-24 12:02:40,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:02:40,138 INFO L225 Difference]: With dead ends: 271 [2018-10-24 12:02:40,138 INFO L226 Difference]: Without dead ends: 269 [2018-10-24 12:02:40,139 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1977 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3109, Invalid=5263, Unknown=0, NotChecked=0, Total=8372 [2018-10-24 12:02:40,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-10-24 12:02:40,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 262. [2018-10-24 12:02:40,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2018-10-24 12:02:40,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 263 transitions. [2018-10-24 12:02:40,213 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 263 transitions. Word has length 257 [2018-10-24 12:02:40,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:02:40,213 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 263 transitions. [2018-10-24 12:02:40,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-24 12:02:40,214 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 263 transitions. [2018-10-24 12:02:40,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2018-10-24 12:02:40,215 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:02:40,215 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 43, 42, 42, 42, 1, 1, 1, 1, 1, 1] [2018-10-24 12:02:40,215 INFO L424 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:02:40,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:02:40,216 INFO L82 PathProgramCache]: Analyzing trace with hash -682613297, now seen corresponding path program 83 times [2018-10-24 12:02:40,216 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:02:40,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:02:40,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:40,216 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:02:40,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:40,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:02:42,609 INFO L134 CoverageAnalysis]: Checked inductivity of 5376 backedges. 3570 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:42,610 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:02:42,610 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:02:42,617 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 12:02:42,794 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-10-24 12:02:42,794 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:02:42,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-10-24 12:02:45,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5376 backedges. 3570 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:45,708 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:02:45,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 132 [2018-10-24 12:02:45,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-10-24 12:02:45,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-10-24 12:02:45,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3959, Invalid=13333, Unknown=0, NotChecked=0, Total=17292 [2018-10-24 12:02:45,710 INFO L87 Difference]: Start difference. First operand 262 states and 263 transitions. Second operand 132 states. [2018-10-24 12:02:45,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-24 12:02:45,711 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 12:02:45,716 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 12:02:45,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 12:02:45 BoogieIcfgContainer [2018-10-24 12:02:45,716 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 12:02:45,717 INFO L168 Benchmark]: Toolchain (without parser) took 233883.68 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 801.1 MB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -352.3 MB). Peak memory consumption was 448.8 MB. Max. memory is 7.1 GB. [2018-10-24 12:02:45,718 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 12:02:45,718 INFO L168 Benchmark]: CACSL2BoogieTranslator took 264.09 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-24 12:02:45,719 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.02 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 12:02:45,719 INFO L168 Benchmark]: Boogie Preprocessor took 19.79 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 12:02:45,719 INFO L168 Benchmark]: RCFGBuilder took 346.16 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 740.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -790.3 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. [2018-10-24 12:02:45,720 INFO L168 Benchmark]: TraceAbstraction took 233215.62 ms. Allocated memory was 2.3 GB in the beginning and 2.3 GB in the end (delta: 60.8 MB). Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 427.4 MB). Peak memory consumption was 488.2 MB. Max. memory is 7.1 GB. [2018-10-24 12:02:45,723 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 264.09 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 34.02 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 19.79 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 346.16 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 740.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -790.3 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 233215.62 ms. Allocated memory was 2.3 GB in the beginning and 2.3 GB in the end (delta: 60.8 MB). Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 427.4 MB). Peak memory consumption was 488.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 5]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 5). Cancelled while BasicCegarLoop was constructing difference of abstraction (262states) and FLOYD_HOARE automaton (currently 2 states, 132 states before enhancement),while ReachableStatesComputation was computing reachable states (1 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. TIMEOUT Result, 233.1s OverallTime, 86 OverallIterations, 43 TraceHistogramMax, 89.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3315 SDtfs, 7397 SDslu, 51983 SDs, 0 SdLazy, 52732 SolverSat, 4363 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 33.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17298 GetRequests, 11418 SyntacticMatches, 0 SemanticMatches, 5880 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122023 ImplicationChecksByTransitivity, 163.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=262occurred in iteration=85, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 2.4s AutomataMinimizationTime, 85 MinimizatonAttempts, 294 StatesRemovedByMinimization, 42 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.1s SsaConstructionTime, 6.7s SatisfiabilityAnalysisTime, 128.0s InterpolantComputationTime, 22854 NumberOfCodeBlocks, 22854 NumberOfCodeBlocksAsserted, 1099 NumberOfCheckSat, 22685 ConstructedInterpolants, 0 QuantifiedInterpolants, 15693101 SizeOfPredicates, 249 NumberOfNonLiveVariables, 32060 ConjunctsInSsa, 4024 ConjunctsInUnsatCore, 169 InterpolantComputations, 3 PerfectInterpolantSequences, 157120/307102 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown