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/loops-crafted-1/Mono3_false-unreach-call1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b6335f6 [2018-10-23 09:44:16,717 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 09:44:16,719 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 09:44:16,738 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 09:44:16,738 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 09:44:16,740 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 09:44:16,742 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 09:44:16,744 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 09:44:16,755 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 09:44:16,756 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 09:44:16,764 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 09:44:16,764 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 09:44:16,767 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 09:44:16,768 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 09:44:16,769 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 09:44:16,772 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 09:44:16,773 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 09:44:16,776 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 09:44:16,780 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 09:44:16,783 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 09:44:16,784 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 09:44:16,785 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 09:44:16,790 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-23 09:44:16,798 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 [2018-10-23 09:44:16,814 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 09:44:16,814 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 09:44:16,815 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 09:44:16,815 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-23 09:44:16,815 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-23 09:44:16,816 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-23 09:44:16,816 INFO L133 SettingsManager]: * Use SBE=true [2018-10-23 09:44:16,816 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 09:44:16,816 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 09:44:16,816 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 09:44:16,817 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 09:44:16,817 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 09:44:16,817 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 09:44:16,817 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 09:44:16,817 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 09:44:16,818 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 09:44:16,818 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 09:44:16,818 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 09:44:16,818 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 09:44:16,818 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 09:44:16,819 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 09:44:16,820 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 09:44:16,820 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 09:44:16,820 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-23 09:44:16,821 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 09:44:16,821 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 09:44:16,821 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 09:44:16,821 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 09:44:16,889 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 09:44:16,909 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 09:44:16,913 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 09:44:16,915 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 09:44:16,915 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 09:44:16,916 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono3_false-unreach-call1.c [2018-10-23 09:44:16,981 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/2a6f138a2/b0256fc6b8ce4cd8b9b803babeb13347/FLAG17d365654 [2018-10-23 09:44:17,402 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 09:44:17,403 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono3_false-unreach-call1.c [2018-10-23 09:44:17,408 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/2a6f138a2/b0256fc6b8ce4cd8b9b803babeb13347/FLAG17d365654 [2018-10-23 09:44:17,422 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/2a6f138a2/b0256fc6b8ce4cd8b9b803babeb13347 [2018-10-23 09:44:17,431 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 09:44:17,433 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 09:44:17,434 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 09:44:17,434 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 09:44:17,439 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 09:44:17,440 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:44:17" (1/1) ... [2018-10-23 09:44:17,443 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@289bb2af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:17, skipping insertion in model container [2018-10-23 09:44:17,443 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:44:17" (1/1) ... [2018-10-23 09:44:17,454 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 09:44:17,473 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 09:44:17,657 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 09:44:17,661 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 09:44:17,679 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 09:44:17,696 INFO L193 MainTranslator]: Completed translation [2018-10-23 09:44:17,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:17 WrapperNode [2018-10-23 09:44:17,696 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 09:44:17,697 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 09:44:17,698 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 09:44:17,698 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 09:44:17,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:17" (1/1) ... [2018-10-23 09:44:17,712 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:17" (1/1) ... [2018-10-23 09:44:17,727 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 09:44:17,728 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 09:44:17,728 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 09:44:17,728 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 09:44:17,738 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:17" (1/1) ... [2018-10-23 09:44:17,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:17" (1/1) ... [2018-10-23 09:44:17,739 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:17" (1/1) ... [2018-10-23 09:44:17,739 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:17" (1/1) ... [2018-10-23 09:44:17,741 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:17" (1/1) ... [2018-10-23 09:44:17,745 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:17" (1/1) ... [2018-10-23 09:44:17,746 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:17" (1/1) ... [2018-10-23 09:44:17,747 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 09:44:17,748 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 09:44:17,748 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 09:44:17,748 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 09:44:17,749 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:17" (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 [2018-10-23 09:44:17,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 09:44:17,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 09:44:18,087 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 09:44:18,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:44:18 BoogieIcfgContainer [2018-10-23 09:44:18,088 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 09:44:18,089 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 09:44:18,089 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 09:44:18,092 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 09:44:18,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 09:44:17" (1/3) ... [2018-10-23 09:44:18,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dcbc9bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:44:18, skipping insertion in model container [2018-10-23 09:44:18,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:17" (2/3) ... [2018-10-23 09:44:18,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dcbc9bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:44:18, skipping insertion in model container [2018-10-23 09:44:18,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:44:18" (3/3) ... [2018-10-23 09:44:18,096 INFO L112 eAbstractionObserver]: Analyzing ICFG Mono3_false-unreach-call1.c [2018-10-23 09:44:18,106 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 09:44:18,113 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 09:44:18,129 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 09:44:18,161 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-23 09:44:18,161 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 09:44:18,162 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 09:44:18,162 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 09:44:18,162 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 09:44:18,162 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 09:44:18,162 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 09:44:18,162 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 09:44:18,163 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 09:44:18,177 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2018-10-23 09:44:18,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-23 09:44:18,183 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:44:18,184 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-23 09:44:18,186 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:44:18,192 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:44:18,193 INFO L82 PathProgramCache]: Analyzing trace with hash 889999271, now seen corresponding path program 1 times [2018-10-23 09:44:18,195 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:44:18,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:44:18,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:18,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:44:18,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:18,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:44:18,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:44:18,305 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 09:44:18,306 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-23 09:44:18,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-23 09:44:18,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-23 09:44:18,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-23 09:44:18,325 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 2 states. [2018-10-23 09:44:18,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:44:18,340 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2018-10-23 09:44:18,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-23 09:44:18,343 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-10-23 09:44:18,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:44:18,352 INFO L225 Difference]: With dead ends: 22 [2018-10-23 09:44:18,352 INFO L226 Difference]: Without dead ends: 10 [2018-10-23 09:44:18,356 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 [2018-10-23 09:44:18,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-23 09:44:18,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-23 09:44:18,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-23 09:44:18,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2018-10-23 09:44:18,386 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2018-10-23 09:44:18,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:44:18,386 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2018-10-23 09:44:18,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-23 09:44:18,387 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2018-10-23 09:44:18,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-23 09:44:18,387 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:44:18,387 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:44:18,387 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:44:18,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:44:18,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1805930610, now seen corresponding path program 1 times [2018-10-23 09:44:18,388 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:44:18,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:44:18,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:18,389 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:44:18,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:18,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:44:18,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:44:18,544 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 09:44:18,544 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 09:44:18,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 09:44:18,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 09:44:18,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 09:44:18,547 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 3 states. [2018-10-23 09:44:18,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:44:18,700 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2018-10-23 09:44:18,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 09:44:18,700 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-10-23 09:44:18,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:44:18,701 INFO L225 Difference]: With dead ends: 22 [2018-10-23 09:44:18,701 INFO L226 Difference]: Without dead ends: 14 [2018-10-23 09:44:18,703 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 09:44:18,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-23 09:44:18,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2018-10-23 09:44:18,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-23 09:44:18,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-10-23 09:44:18,707 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 7 [2018-10-23 09:44:18,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:44:18,707 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-10-23 09:44:18,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 09:44:18,708 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-10-23 09:44:18,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-23 09:44:18,708 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:44:18,709 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:44:18,709 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:44:18,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:44:18,709 INFO L82 PathProgramCache]: Analyzing trace with hash -2102379768, now seen corresponding path program 1 times [2018-10-23 09:44:18,709 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:44:18,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:44:18,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:18,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:44:18,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:18,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:44:18,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:44:18,881 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:44:18,881 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 [2018-10-23 09:44:18,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:44:18,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:44:18,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:44:19,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:44:19,064 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:44:19,064 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2018-10-23 09:44:19,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-23 09:44:19,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-23 09:44:19,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-10-23 09:44:19,066 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 7 states. [2018-10-23 09:44:19,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:44:19,246 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2018-10-23 09:44:19,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-23 09:44:19,247 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-23 09:44:19,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:44:19,247 INFO L225 Difference]: With dead ends: 26 [2018-10-23 09:44:19,248 INFO L226 Difference]: Without dead ends: 18 [2018-10-23 09:44:19,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-10-23 09:44:19,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-23 09:44:19,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-10-23 09:44:19,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-23 09:44:19,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-10-23 09:44:19,253 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 11 [2018-10-23 09:44:19,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:44:19,253 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-10-23 09:44:19,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-23 09:44:19,254 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-10-23 09:44:19,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-23 09:44:19,254 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:44:19,255 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-10-23 09:44:19,255 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:44:19,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:44:19,256 INFO L82 PathProgramCache]: Analyzing trace with hash 100199070, now seen corresponding path program 2 times [2018-10-23 09:44:19,256 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:44:19,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:44:19,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:19,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:44:19,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:19,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:44:19,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:44:19,538 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:44:19,538 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 [2018-10-23 09:44:19,560 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:44:19,603 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:44:19,603 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:44:19,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:44:19,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:44:19,809 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:44:19,809 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2018-10-23 09:44:19,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-23 09:44:19,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-23 09:44:19,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-10-23 09:44:19,812 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 10 states. [2018-10-23 09:44:20,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:44:20,018 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2018-10-23 09:44:20,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-23 09:44:20,018 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2018-10-23 09:44:20,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:44:20,020 INFO L225 Difference]: With dead ends: 30 [2018-10-23 09:44:20,020 INFO L226 Difference]: Without dead ends: 22 [2018-10-23 09:44:20,021 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-10-23 09:44:20,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-23 09:44:20,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2018-10-23 09:44:20,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-23 09:44:20,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-23 09:44:20,028 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 15 [2018-10-23 09:44:20,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:44:20,028 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-23 09:44:20,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-23 09:44:20,028 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-23 09:44:20,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-23 09:44:20,029 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:44:20,029 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2018-10-23 09:44:20,030 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:44:20,030 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:44:20,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1335090996, now seen corresponding path program 3 times [2018-10-23 09:44:20,030 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:44:20,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:44:20,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:20,032 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:44:20,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:20,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:44:20,186 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:44:20,186 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:44:20,186 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 [2018-10-23 09:44:20,204 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:44:20,233 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-23 09:44:20,233 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:44:20,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:44:20,299 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-10-23 09:44:20,321 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 09:44:20,321 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2018-10-23 09:44:20,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-23 09:44:20,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-23 09:44:20,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-23 09:44:20,322 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 8 states. [2018-10-23 09:44:20,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:44:20,784 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2018-10-23 09:44:20,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-23 09:44:20,784 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2018-10-23 09:44:20,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:44:20,786 INFO L225 Difference]: With dead ends: 43 [2018-10-23 09:44:20,786 INFO L226 Difference]: Without dead ends: 35 [2018-10-23 09:44:20,786 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-23 09:44:20,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-23 09:44:20,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2018-10-23 09:44:20,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-23 09:44:20,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2018-10-23 09:44:20,793 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 19 [2018-10-23 09:44:20,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:44:20,793 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2018-10-23 09:44:20,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-23 09:44:20,794 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2018-10-23 09:44:20,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-23 09:44:20,795 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:44:20,795 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:44:20,795 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:44:20,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:44:20,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1682583176, now seen corresponding path program 1 times [2018-10-23 09:44:20,796 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:44:20,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:44:20,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:20,797 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:44:20,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:20,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:44:21,085 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:44:21,085 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:44:21,086 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 [2018-10-23 09:44:21,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:44:21,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:44:21,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:44:21,247 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 17 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:44:21,270 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:44:21,270 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2018-10-23 09:44:21,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-23 09:44:21,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-23 09:44:21,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-23 09:44:21,271 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 9 states. [2018-10-23 09:44:21,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:44:21,468 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2018-10-23 09:44:21,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-23 09:44:21,468 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2018-10-23 09:44:21,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:44:21,469 INFO L225 Difference]: With dead ends: 52 [2018-10-23 09:44:21,470 INFO L226 Difference]: Without dead ends: 41 [2018-10-23 09:44:21,470 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-23 09:44:21,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-23 09:44:21,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2018-10-23 09:44:21,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-23 09:44:21,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2018-10-23 09:44:21,477 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 31 [2018-10-23 09:44:21,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:44:21,477 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2018-10-23 09:44:21,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-23 09:44:21,478 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2018-10-23 09:44:21,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-23 09:44:21,479 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:44:21,479 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:44:21,479 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:44:21,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:44:21,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1084860324, now seen corresponding path program 2 times [2018-10-23 09:44:21,480 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:44:21,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:44:21,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:21,481 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:44:21,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:21,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:44:21,746 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:44:21,746 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:44:21,747 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 [2018-10-23 09:44:21,755 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:44:21,771 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:44:21,771 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:44:21,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:44:21,811 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:44:21,844 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:44:21,845 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-23 09:44:21,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-23 09:44:21,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-23 09:44:21,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-23 09:44:21,846 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 11 states. [2018-10-23 09:44:22,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:44:22,171 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2018-10-23 09:44:22,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-23 09:44:22,172 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2018-10-23 09:44:22,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:44:22,173 INFO L225 Difference]: With dead ends: 60 [2018-10-23 09:44:22,173 INFO L226 Difference]: Without dead ends: 49 [2018-10-23 09:44:22,174 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-23 09:44:22,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-23 09:44:22,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2018-10-23 09:44:22,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-23 09:44:22,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-10-23 09:44:22,184 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 39 [2018-10-23 09:44:22,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:44:22,185 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-10-23 09:44:22,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-23 09:44:22,185 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-10-23 09:44:22,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-23 09:44:22,187 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:44:22,187 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:44:22,187 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:44:22,187 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:44:22,188 INFO L82 PathProgramCache]: Analyzing trace with hash -215313968, now seen corresponding path program 3 times [2018-10-23 09:44:22,188 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:44:22,188 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:44:22,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:22,189 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:44:22,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:22,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:44:22,484 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:44:22,484 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:44:22,484 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 [2018-10-23 09:44:22,502 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:44:22,522 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-23 09:44:22,522 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:44:22,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:44:22,627 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 61 proven. 3 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2018-10-23 09:44:22,647 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:44:22,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 16 [2018-10-23 09:44:22,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-23 09:44:22,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-23 09:44:22,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2018-10-23 09:44:22,649 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2018-10-23 09:44:23,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:44:23,757 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2018-10-23 09:44:23,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-23 09:44:23,758 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2018-10-23 09:44:23,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:44:23,759 INFO L225 Difference]: With dead ends: 82 [2018-10-23 09:44:23,760 INFO L226 Difference]: Without dead ends: 71 [2018-10-23 09:44:23,760 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2018-10-23 09:44:23,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-23 09:44:23,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2018-10-23 09:44:23,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-23 09:44:23,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2018-10-23 09:44:23,768 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 47 [2018-10-23 09:44:23,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:44:23,769 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2018-10-23 09:44:23,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-23 09:44:23,769 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2018-10-23 09:44:23,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-23 09:44:23,770 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:44:23,771 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 12, 2, 1, 1, 1, 1, 1, 1] [2018-10-23 09:44:23,771 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:44:23,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:44:23,771 INFO L82 PathProgramCache]: Analyzing trace with hash 760022954, now seen corresponding path program 4 times [2018-10-23 09:44:23,771 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:44:23,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:44:23,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:23,773 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:44:23,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:23,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:44:24,170 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:44:24,170 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:44:24,170 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 [2018-10-23 09:44:24,179 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:44:24,206 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:44:24,207 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:44:24,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:44:24,262 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 89 proven. 300 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-23 09:44:24,284 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:44:24,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2018-10-23 09:44:24,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-23 09:44:24,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-23 09:44:24,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-23 09:44:24,285 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 17 states. [2018-10-23 09:44:24,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:44:24,993 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2018-10-23 09:44:25,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-23 09:44:25,001 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2018-10-23 09:44:25,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:44:25,003 INFO L225 Difference]: With dead ends: 92 [2018-10-23 09:44:25,004 INFO L226 Difference]: Without dead ends: 77 [2018-10-23 09:44:25,004 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-23 09:44:25,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-23 09:44:25,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2018-10-23 09:44:25,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-23 09:44:25,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2018-10-23 09:44:25,013 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 63 [2018-10-23 09:44:25,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:44:25,013 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2018-10-23 09:44:25,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-23 09:44:25,014 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2018-10-23 09:44:25,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-23 09:44:25,015 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:44:25,016 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 15, 2, 1, 1, 1, 1, 1, 1] [2018-10-23 09:44:25,016 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:44:25,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:44:25,017 INFO L82 PathProgramCache]: Analyzing trace with hash 258566252, now seen corresponding path program 5 times [2018-10-23 09:44:25,017 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:44:25,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:44:25,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:25,018 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:44:25,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:25,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:44:25,559 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:44:25,560 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:44:25,560 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 [2018-10-23 09:44:25,573 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:46:24,702 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-23 09:46:24,702 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:46:25,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:46:25,656 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:46:25,677 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:46:25,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-23 09:46:25,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-23 09:46:25,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-23 09:46:25,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-10-23 09:46:25,679 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 20 states. [2018-10-23 09:46:26,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:46:26,641 INFO L93 Difference]: Finished difference Result 104 states and 111 transitions. [2018-10-23 09:46:26,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-23 09:46:26,642 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 75 [2018-10-23 09:46:26,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:46:26,643 INFO L225 Difference]: With dead ends: 104 [2018-10-23 09:46:26,644 INFO L226 Difference]: Without dead ends: 89 [2018-10-23 09:46:26,645 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-10-23 09:46:26,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-23 09:46:26,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2018-10-23 09:46:26,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-23 09:46:26,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2018-10-23 09:46:26,661 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 75 [2018-10-23 09:46:26,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:46:26,662 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2018-10-23 09:46:26,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-23 09:46:26,662 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2018-10-23 09:46:26,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-23 09:46:26,663 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:46:26,663 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 18, 2, 1, 1, 1, 1, 1, 1] [2018-10-23 09:46:26,664 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:46:26,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:46:26,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1992247762, now seen corresponding path program 6 times [2018-10-23 09:46:26,666 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:46:26,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:46:26,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:46:26,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:46:26,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:46:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:46:27,162 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:46:27,162 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:46:27,162 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 [2018-10-23 09:46:27,169 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:46:27,232 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-23 09:46:27,233 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:46:27,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:46:27,435 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 195 proven. 10 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2018-10-23 09:46:27,456 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:46:27,457 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 6] total 27 [2018-10-23 09:46:27,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-23 09:46:27,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-23 09:46:27,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2018-10-23 09:46:27,458 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 27 states. [2018-10-23 09:46:29,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:46:29,878 INFO L93 Difference]: Finished difference Result 134 states and 147 transitions. [2018-10-23 09:46:29,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-23 09:46:29,878 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 87 [2018-10-23 09:46:29,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:46:29,882 INFO L225 Difference]: With dead ends: 134 [2018-10-23 09:46:29,882 INFO L226 Difference]: Without dead ends: 119 [2018-10-23 09:46:29,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=278, Invalid=778, Unknown=0, NotChecked=0, Total=1056 [2018-10-23 09:46:29,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-23 09:46:29,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 108. [2018-10-23 09:46:29,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-23 09:46:29,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 111 transitions. [2018-10-23 09:46:29,894 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 111 transitions. Word has length 87 [2018-10-23 09:46:29,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:46:29,894 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 111 transitions. [2018-10-23 09:46:29,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-23 09:46:29,894 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 111 transitions. [2018-10-23 09:46:29,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-23 09:46:29,896 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:46:29,896 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 22, 3, 1, 1, 1, 1, 1, 1] [2018-10-23 09:46:29,896 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:46:29,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:46:29,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1476117918, now seen corresponding path program 7 times [2018-10-23 09:46:29,897 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:46:29,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:46:29,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:46:29,898 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:46:29,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:46:29,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:46:30,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:46:30,503 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:46:30,503 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 [2018-10-23 09:46:30,513 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:46:30,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:46:30,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:46:30,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 250 proven. 990 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-10-23 09:46:30,706 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:46:30,706 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25] total 28 [2018-10-23 09:46:30,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-23 09:46:30,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-23 09:46:30,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-10-23 09:46:30,708 INFO L87 Difference]: Start difference. First operand 108 states and 111 transitions. Second operand 28 states. [2018-10-23 09:46:32,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:46:32,348 INFO L93 Difference]: Finished difference Result 144 states and 154 transitions. [2018-10-23 09:46:32,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-23 09:46:32,349 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 107 [2018-10-23 09:46:32,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:46:32,350 INFO L225 Difference]: With dead ends: 144 [2018-10-23 09:46:32,351 INFO L226 Difference]: Without dead ends: 125 [2018-10-23 09:46:32,352 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-10-23 09:46:32,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-23 09:46:32,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2018-10-23 09:46:32,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-23 09:46:32,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 127 transitions. [2018-10-23 09:46:32,363 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 127 transitions. Word has length 107 [2018-10-23 09:46:32,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:46:32,363 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 127 transitions. [2018-10-23 09:46:32,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-23 09:46:32,364 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 127 transitions. [2018-10-23 09:46:32,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-23 09:46:32,365 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:46:32,365 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 26, 3, 1, 1, 1, 1, 1, 1] [2018-10-23 09:46:32,365 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:46:32,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:46:32,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1488190986, now seen corresponding path program 8 times [2018-10-23 09:46:32,366 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:46:32,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:46:32,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:46:32,367 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:46:32,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:46:32,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:46:33,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 0 proven. 1682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:46:33,377 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:46:33,378 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 [2018-10-23 09:46:33,387 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:46:33,425 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:46:33,426 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:46:33,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:46:33,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 0 proven. 1682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:46:33,560 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:46:33,561 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-23 09:46:33,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-23 09:46:33,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-23 09:46:33,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-10-23 09:46:33,562 INFO L87 Difference]: Start difference. First operand 124 states and 127 transitions. Second operand 32 states. [2018-10-23 09:46:35,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:46:35,444 INFO L93 Difference]: Finished difference Result 160 states and 170 transitions. [2018-10-23 09:46:35,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-23 09:46:35,444 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 123 [2018-10-23 09:46:35,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:46:35,446 INFO L225 Difference]: With dead ends: 160 [2018-10-23 09:46:35,446 INFO L226 Difference]: Without dead ends: 141 [2018-10-23 09:46:35,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-10-23 09:46:35,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-23 09:46:35,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2018-10-23 09:46:35,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-10-23 09:46:35,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 143 transitions. [2018-10-23 09:46:35,458 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 143 transitions. Word has length 123 [2018-10-23 09:46:35,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:46:35,458 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 143 transitions. [2018-10-23 09:46:35,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-23 09:46:35,459 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 143 transitions. [2018-10-23 09:46:35,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-10-23 09:46:35,460 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:46:35,460 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 30, 3, 1, 1, 1, 1, 1, 1] [2018-10-23 09:46:35,460 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:46:35,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:46:35,461 INFO L82 PathProgramCache]: Analyzing trace with hash -519532978, now seen corresponding path program 9 times [2018-10-23 09:46:35,461 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:46:35,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:46:35,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:46:35,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:46:35,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:46:35,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:46:36,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 0 proven. 2178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:46:36,785 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:46:36,785 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 [2018-10-23 09:46:36,794 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:46:36,819 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-23 09:46:36,819 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:46:36,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:46:37,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 446 proven. 21 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2018-10-23 09:46:37,154 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:46:37,154 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 7] total 41 [2018-10-23 09:46:37,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-23 09:46:37,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-23 09:46:37,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2018-10-23 09:46:37,156 INFO L87 Difference]: Start difference. First operand 140 states and 143 transitions. Second operand 41 states. [2018-10-23 09:46:41,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:46:41,367 INFO L93 Difference]: Finished difference Result 198 states and 215 transitions. [2018-10-23 09:46:41,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-23 09:46:41,368 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 139 [2018-10-23 09:46:41,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:46:41,370 INFO L225 Difference]: With dead ends: 198 [2018-10-23 09:46:41,370 INFO L226 Difference]: Without dead ends: 179 [2018-10-23 09:46:41,371 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=584, Invalid=1866, Unknown=0, NotChecked=0, Total=2450 [2018-10-23 09:46:41,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-23 09:46:41,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 164. [2018-10-23 09:46:41,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-10-23 09:46:41,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 168 transitions. [2018-10-23 09:46:41,387 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 168 transitions. Word has length 139 [2018-10-23 09:46:41,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:46:41,388 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 168 transitions. [2018-10-23 09:46:41,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-23 09:46:41,388 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 168 transitions. [2018-10-23 09:46:41,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-10-23 09:46:41,390 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:46:41,390 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 35, 4, 1, 1, 1, 1, 1, 1] [2018-10-23 09:46:41,390 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:46:41,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:46:41,391 INFO L82 PathProgramCache]: Analyzing trace with hash 809843284, now seen corresponding path program 10 times [2018-10-23 09:46:41,391 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:46:41,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:46:41,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:46:41,392 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:46:41,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:46:41,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:46:42,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 116 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:46:42,988 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:46:42,988 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 [2018-10-23 09:46:42,996 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:46:43,049 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:46:43,049 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:46:43,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:46:43,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 536 proven. 2485 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-10-23 09:46:43,376 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:46:43,377 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 38] total 42 [2018-10-23 09:46:43,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-23 09:46:43,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-23 09:46:43,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2018-10-23 09:46:43,379 INFO L87 Difference]: Start difference. First operand 164 states and 168 transitions. Second operand 42 states. [2018-10-23 09:46:46,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:46:46,489 INFO L93 Difference]: Finished difference Result 204 states and 216 transitions. [2018-10-23 09:46:46,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-23 09:46:46,489 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 163 [2018-10-23 09:46:46,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:46:46,491 INFO L225 Difference]: With dead ends: 204 [2018-10-23 09:46:46,491 INFO L226 Difference]: Without dead ends: 181 [2018-10-23 09:46:46,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 162 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2018-10-23 09:46:46,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-10-23 09:46:46,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 180. [2018-10-23 09:46:46,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-10-23 09:46:46,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 184 transitions. [2018-10-23 09:46:46,503 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 184 transitions. Word has length 163 [2018-10-23 09:46:46,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:46:46,503 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 184 transitions. [2018-10-23 09:46:46,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-23 09:46:46,503 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 184 transitions. [2018-10-23 09:46:46,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-10-23 09:46:46,505 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:46:46,505 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 39, 4, 1, 1, 1, 1, 1, 1] [2018-10-23 09:46:46,505 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:46:46,506 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:46:46,506 INFO L82 PathProgramCache]: Analyzing trace with hash -325808468, now seen corresponding path program 11 times [2018-10-23 09:46:46,506 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:46:46,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:46:46,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:46:46,507 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:46:46,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:46:46,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:46:48,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 128 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:46:48,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:46:48,629 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 [2018-10-23 09:46:48,638 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown