java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_false-unreach-call2_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-26 22:24:01,071 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 22:24:01,073 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 22:24:01,085 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 22:24:01,085 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 22:24:01,086 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 22:24:01,088 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 22:24:01,090 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 22:24:01,091 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 22:24:01,092 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 22:24:01,093 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 22:24:01,094 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 22:24:01,095 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 22:24:01,096 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 22:24:01,097 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 22:24:01,098 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 22:24:01,099 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 22:24:01,101 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 22:24:01,103 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 22:24:01,105 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 22:24:01,106 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 22:24:01,107 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 22:24:01,110 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 22:24:01,110 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 22:24:01,113 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 22:24:01,114 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 22:24:01,115 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 22:24:01,118 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 22:24:01,119 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 22:24:01,123 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 22:24:01,124 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 22:24:01,124 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 22:24:01,128 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 22:24:01,128 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 22:24:01,129 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 22:24:01,130 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 22:24:01,130 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 [2018-10-26 22:24:01,155 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 22:24:01,155 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 22:24:01,155 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 22:24:01,156 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-26 22:24:01,156 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-26 22:24:01,157 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-26 22:24:01,157 INFO L133 SettingsManager]: * Use SBE=true [2018-10-26 22:24:01,157 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 22:24:01,157 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 22:24:01,157 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 22:24:01,157 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 22:24:01,159 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 22:24:01,159 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 22:24:01,159 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 22:24:01,159 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 22:24:01,160 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 22:24:01,161 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 22:24:01,161 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 22:24:01,161 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 22:24:01,162 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 22:24:01,162 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 22:24:01,162 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 22:24:01,162 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 22:24:01,163 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-26 22:24:01,163 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 22:24:01,163 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 22:24:01,163 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 22:24:01,163 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-26 22:24:01,219 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 22:24:01,232 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 22:24:01,236 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 22:24:01,238 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 22:24:01,238 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 22:24:01,239 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_false-unreach-call2_true-termination.i [2018-10-26 22:24:01,303 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/b2c6b2180/d0659b6567264acdb452f105dc44d30b/FLAGc7f28943e [2018-10-26 22:24:01,765 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 22:24:01,766 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_false-unreach-call2_true-termination.i [2018-10-26 22:24:01,772 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/b2c6b2180/d0659b6567264acdb452f105dc44d30b/FLAGc7f28943e [2018-10-26 22:24:01,788 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/b2c6b2180/d0659b6567264acdb452f105dc44d30b [2018-10-26 22:24:01,801 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 22:24:01,802 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-26 22:24:01,803 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 22:24:01,804 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 22:24:01,810 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 22:24:01,811 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:24:01" (1/1) ... [2018-10-26 22:24:01,815 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75024a1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:24:01, skipping insertion in model container [2018-10-26 22:24:01,815 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:24:01" (1/1) ... [2018-10-26 22:24:01,825 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 22:24:01,844 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 22:24:02,022 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 22:24:02,027 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 22:24:02,044 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 22:24:02,060 INFO L193 MainTranslator]: Completed translation [2018-10-26 22:24:02,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:24:02 WrapperNode [2018-10-26 22:24:02,061 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 22:24:02,062 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 22:24:02,062 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 22:24:02,062 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 22:24:02,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:24:02" (1/1) ... [2018-10-26 22:24:02,078 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:24:02" (1/1) ... [2018-10-26 22:24:02,098 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 22:24:02,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 22:24:02,099 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 22:24:02,099 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 22:24:02,110 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:24:02" (1/1) ... [2018-10-26 22:24:02,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:24:02" (1/1) ... [2018-10-26 22:24:02,111 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:24:02" (1/1) ... [2018-10-26 22:24:02,111 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:24:02" (1/1) ... [2018-10-26 22:24:02,112 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:24:02" (1/1) ... [2018-10-26 22:24:02,119 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:24:02" (1/1) ... [2018-10-26 22:24:02,120 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:24:02" (1/1) ... [2018-10-26 22:24:02,121 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 22:24:02,122 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 22:24:02,122 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 22:24:02,122 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 22:24:02,123 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:24:02" (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 [2018-10-26 22:24:02,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 22:24:02,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 22:24:02,546 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 22:24:02,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:24:02 BoogieIcfgContainer [2018-10-26 22:24:02,547 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 22:24:02,548 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 22:24:02,548 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 22:24:02,551 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 22:24:02,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 10:24:01" (1/3) ... [2018-10-26 22:24:02,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@307870b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:24:02, skipping insertion in model container [2018-10-26 22:24:02,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:24:02" (2/3) ... [2018-10-26 22:24:02,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@307870b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:24:02, skipping insertion in model container [2018-10-26 22:24:02,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:24:02" (3/3) ... [2018-10-26 22:24:02,555 INFO L112 eAbstractionObserver]: Analyzing ICFG underapprox_false-unreach-call2_true-termination.i [2018-10-26 22:24:02,565 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 22:24:02,573 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 22:24:02,590 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 22:24:02,624 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 22:24:02,625 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 22:24:02,625 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 22:24:02,625 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 22:24:02,625 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 22:24:02,626 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 22:24:02,626 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 22:24:02,626 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 22:24:02,626 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 22:24:02,642 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2018-10-26 22:24:02,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-26 22:24:02,648 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:24:02,649 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-26 22:24:02,652 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:24:02,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:24:02,658 INFO L82 PathProgramCache]: Analyzing trace with hash 889783783, now seen corresponding path program 1 times [2018-10-26 22:24:02,661 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:24:02,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:24:02,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:24:02,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:24:02,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:24:02,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:24:02,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:24:02,767 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 22:24:02,768 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-26 22:24:02,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-26 22:24:02,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-26 22:24:02,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-26 22:24:02,788 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2018-10-26 22:24:02,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:24:02,805 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-10-26 22:24:02,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-26 22:24:02,809 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-10-26 22:24:02,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:24:02,819 INFO L225 Difference]: With dead ends: 20 [2018-10-26 22:24:02,820 INFO L226 Difference]: Without dead ends: 8 [2018-10-26 22:24:02,824 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 [2018-10-26 22:24:02,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-26 22:24:02,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-26 22:24:02,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-26 22:24:02,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-26 22:24:02,861 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-10-26 22:24:02,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:24:02,862 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-26 22:24:02,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-26 22:24:02,862 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-26 22:24:02,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-26 22:24:02,863 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:24:02,863 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:24:02,863 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:24:02,863 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:24:02,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1805923659, now seen corresponding path program 1 times [2018-10-26 22:24:02,864 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:24:02,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:24:02,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:24:02,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:24:02,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:24:02,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:24:02,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:24:02,992 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 22:24:02,992 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 22:24:02,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 22:24:02,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 22:24:02,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 22:24:02,995 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 3 states. [2018-10-26 22:24:03,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:24:03,071 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-26 22:24:03,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 22:24:03,073 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-10-26 22:24:03,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:24:03,074 INFO L225 Difference]: With dead ends: 14 [2018-10-26 22:24:03,074 INFO L226 Difference]: Without dead ends: 10 [2018-10-26 22:24:03,075 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 22:24:03,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-26 22:24:03,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-26 22:24:03,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-26 22:24:03,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-26 22:24:03,079 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-10-26 22:24:03,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:24:03,080 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-26 22:24:03,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 22:24:03,080 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-26 22:24:03,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-26 22:24:03,081 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:24:03,081 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:24:03,081 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:24:03,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:24:03,082 INFO L82 PathProgramCache]: Analyzing trace with hash 373599493, now seen corresponding path program 1 times [2018-10-26 22:24:03,082 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:24:03,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:24:03,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:24:03,083 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:24:03,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:24:03,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:24:03,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:24:03,225 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:24:03,225 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 [2018-10-26 22:24:03,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:24:03,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:24:03,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:24:03,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:24:03,325 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:24:03,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-26 22:24:03,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 22:24:03,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 22:24:03,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-26 22:24:03,327 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 4 states. [2018-10-26 22:24:03,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:24:03,379 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-26 22:24:03,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 22:24:03,380 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2018-10-26 22:24:03,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:24:03,381 INFO L225 Difference]: With dead ends: 16 [2018-10-26 22:24:03,382 INFO L226 Difference]: Without dead ends: 12 [2018-10-26 22:24:03,382 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-26 22:24:03,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-26 22:24:03,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-26 22:24:03,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-26 22:24:03,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-26 22:24:03,387 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-10-26 22:24:03,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:24:03,388 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-26 22:24:03,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 22:24:03,388 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-26 22:24:03,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-26 22:24:03,388 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:24:03,388 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2018-10-26 22:24:03,389 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:24:03,389 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:24:03,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1700389313, now seen corresponding path program 2 times [2018-10-26 22:24:03,389 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:24:03,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:24:03,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:24:03,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:24:03,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:24:03,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:24:03,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:24:03,507 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:24:03,507 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 [2018-10-26 22:24:03,524 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:24:03,560 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:24:03,560 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:24:03,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:24:03,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:24:03,622 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:24:03,622 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-26 22:24:03,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 22:24:03,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 22:24:03,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-26 22:24:03,624 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 5 states. [2018-10-26 22:24:03,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:24:03,744 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-26 22:24:03,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 22:24:03,745 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-10-26 22:24:03,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:24:03,746 INFO L225 Difference]: With dead ends: 18 [2018-10-26 22:24:03,746 INFO L226 Difference]: Without dead ends: 14 [2018-10-26 22:24:03,747 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-26 22:24:03,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-26 22:24:03,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-26 22:24:03,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-26 22:24:03,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-26 22:24:03,750 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-10-26 22:24:03,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:24:03,751 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-26 22:24:03,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 22:24:03,751 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-26 22:24:03,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-26 22:24:03,752 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:24:03,752 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1] [2018-10-26 22:24:03,752 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:24:03,752 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:24:03,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1938806535, now seen corresponding path program 3 times [2018-10-26 22:24:03,753 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:24:03,753 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:24:03,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:24:03,754 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:24:03,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:24:03,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:24:04,065 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:24:04,065 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:24:04,066 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 [2018-10-26 22:24:04,075 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:24:04,102 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-26 22:24:04,102 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:24:04,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:24:04,151 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:24:04,174 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:24:04,175 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-26 22:24:04,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-26 22:24:04,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-26 22:24:04,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-26 22:24:04,176 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2018-10-26 22:24:04,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:24:04,225 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-26 22:24:04,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-26 22:24:04,227 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-10-26 22:24:04,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:24:04,228 INFO L225 Difference]: With dead ends: 20 [2018-10-26 22:24:04,228 INFO L226 Difference]: Without dead ends: 16 [2018-10-26 22:24:04,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-26 22:24:04,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-26 22:24:04,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-26 22:24:04,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-26 22:24:04,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-26 22:24:04,232 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-10-26 22:24:04,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:24:04,233 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-26 22:24:04,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-26 22:24:04,233 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-26 22:24:04,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-26 22:24:04,234 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:24:04,234 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2018-10-26 22:24:04,234 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:24:04,235 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:24:04,235 INFO L82 PathProgramCache]: Analyzing trace with hash 870477107, now seen corresponding path program 4 times [2018-10-26 22:24:04,235 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:24:04,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:24:04,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:24:04,236 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:24:04,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:24:04,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:24:04,368 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:24:04,368 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:24:04,368 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 [2018-10-26 22:24:04,376 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:24:04,414 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:24:04,414 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:24:04,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:24:04,486 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:24:04,517 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:24:04,517 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-26 22:24:04,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-26 22:24:04,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-26 22:24:04,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-26 22:24:04,519 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 7 states. [2018-10-26 22:24:04,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:24:04,633 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-26 22:24:04,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-26 22:24:04,634 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2018-10-26 22:24:04,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:24:04,635 INFO L225 Difference]: With dead ends: 22 [2018-10-26 22:24:04,635 INFO L226 Difference]: Without dead ends: 18 [2018-10-26 22:24:04,636 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-26 22:24:04,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-26 22:24:04,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-26 22:24:04,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-26 22:24:04,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-26 22:24:04,640 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-10-26 22:24:04,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:24:04,640 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-26 22:24:04,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-26 22:24:04,640 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-26 22:24:04,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-26 22:24:04,641 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:24:04,641 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1] [2018-10-26 22:24:04,642 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:24:04,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:24:04,642 INFO L82 PathProgramCache]: Analyzing trace with hash -942372115, now seen corresponding path program 5 times [2018-10-26 22:24:04,642 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:24:04,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:24:04,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:24:04,644 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:24:04,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:24:04,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:24:04,810 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:24:04,810 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:24:04,811 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 [2018-10-26 22:24:04,828 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:24:04,861 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-26 22:24:04,862 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:24:04,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:24:04,884 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:24:04,906 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:24:04,906 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-26 22:24:04,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-26 22:24:04,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-26 22:24:04,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-26 22:24:04,908 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 8 states. [2018-10-26 22:24:05,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:24:05,346 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-26 22:24:05,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-26 22:24:05,350 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-10-26 22:24:05,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:24:05,351 INFO L225 Difference]: With dead ends: 24 [2018-10-26 22:24:05,351 INFO L226 Difference]: Without dead ends: 20 [2018-10-26 22:24:05,351 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-26 22:24:05,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-26 22:24:05,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-26 22:24:05,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-26 22:24:05,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-26 22:24:05,355 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2018-10-26 22:24:05,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:24:05,356 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-26 22:24:05,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-26 22:24:05,356 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-26 22:24:05,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-26 22:24:05,356 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:24:05,357 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1] [2018-10-26 22:24:05,357 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:24:05,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:24:05,357 INFO L82 PathProgramCache]: Analyzing trace with hash 666247719, now seen corresponding path program 6 times [2018-10-26 22:24:05,357 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:24:05,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:24:05,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:24:05,358 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:24:05,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:24:05,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-26 22:24:05,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-26 22:24:05,397 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-26 22:24:05,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 10:24:05 BoogieIcfgContainer [2018-10-26 22:24:05,419 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 22:24:05,420 INFO L168 Benchmark]: Toolchain (without parser) took 3618.58 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 701.5 MB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -586.4 MB). Peak memory consumption was 115.1 MB. Max. memory is 7.1 GB. [2018-10-26 22:24:05,422 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-26 22:24:05,423 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.78 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-26 22:24:05,424 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.39 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-26 22:24:05,424 INFO L168 Benchmark]: Boogie Preprocessor took 23.17 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-26 22:24:05,425 INFO L168 Benchmark]: RCFGBuilder took 425.50 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 701.5 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -749.1 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. [2018-10-26 22:24:05,426 INFO L168 Benchmark]: TraceAbstraction took 2870.69 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 2.0 GB in the end (delta: 152.1 MB). Peak memory consumption was 152.1 MB. Max. memory is 7.1 GB. [2018-10-26 22:24:05,430 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 257.78 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 36.39 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.17 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 425.50 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 701.5 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -749.1 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2870.69 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 2.0 GB in the end (delta: 152.1 MB). Peak memory consumption was 152.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L9] unsigned int x = 0; [L10] unsigned int y = 1; [L11] COND TRUE x < 6 [L12] x++ [L13] y *= 2 [L11] COND TRUE x < 6 [L12] x++ [L13] y *= 2 [L11] COND TRUE x < 6 [L12] x++ [L13] y *= 2 [L11] COND TRUE x < 6 [L12] x++ [L13] y *= 2 [L11] COND TRUE x < 6 [L12] x++ [L13] y *= 2 [L11] COND TRUE x < 6 [L12] x++ [L13] y *= 2 [L11] COND FALSE !(x < 6) [L15] CALL __VERIFIER_assert(x != 6) [L3] COND TRUE !(cond) [L4] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. UNSAFE Result, 2.8s OverallTime, 8 OverallIterations, 7 TraceHistogramMax, 0.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 69 SDtfs, 0 SDslu, 134 SDs, 0 SdLazy, 154 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 101 GetRequests, 64 SyntacticMatches, 16 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 162 NumberOfCodeBlocks, 162 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 131 ConstructedInterpolants, 0 QuantifiedInterpolants, 7893 SizeOfPredicates, 0 NumberOfNonLiveVariables, 170 ConjunctsInSsa, 75 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 0/140 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...