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/taipan/svcomp-Reach-64bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01_bug02_false-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 15:59:22,069 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 15:59:22,071 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 15:59:22,090 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 15:59:22,091 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 15:59:22,092 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 15:59:22,093 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 15:59:22,095 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 15:59:22,098 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 15:59:22,099 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 15:59:22,100 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 15:59:22,100 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 15:59:22,101 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 15:59:22,102 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 15:59:22,107 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 15:59:22,108 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 15:59:22,109 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 15:59:22,115 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 15:59:22,117 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 15:59:22,118 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 15:59:22,119 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 15:59:22,121 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 15:59:22,124 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-23 15:59:22,139 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-10-23 15:59:22,167 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 15:59:22,167 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 15:59:22,170 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 15:59:22,170 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-23 15:59:22,170 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-23 15:59:22,171 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-23 15:59:22,173 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-23 15:59:22,173 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-23 15:59:22,173 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-23 15:59:22,173 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-23 15:59:22,174 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-23 15:59:22,174 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-23 15:59:22,175 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 15:59:22,175 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 15:59:22,175 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 15:59:22,175 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 15:59:22,175 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 15:59:22,176 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 15:59:22,176 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 15:59:22,176 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 15:59:22,176 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 15:59:22,178 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 15:59:22,178 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 15:59:22,178 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 15:59:22,178 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 15:59:22,179 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 15:59:22,179 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 15:59:22,179 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 15:59:22,179 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-23 15:59:22,179 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 15:59:22,180 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 15:59:22,180 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 15:59:22,180 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 15:59:22,180 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-23 15:59:22,237 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 15:59:22,252 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 15:59:22,257 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 15:59:22,258 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 15:59:22,259 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 15:59:22,260 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loops/sum01_bug02_false-unreach-call_true-termination.i [2018-10-23 15:59:22,331 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/26f468be3/6dcd0ff0817a43deb11ae1e5ffde6a46/FLAG8ac718989 [2018-10-23 15:59:22,814 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 15:59:22,816 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02_false-unreach-call_true-termination.i [2018-10-23 15:59:22,827 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/26f468be3/6dcd0ff0817a43deb11ae1e5ffde6a46/FLAG8ac718989 [2018-10-23 15:59:22,852 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/26f468be3/6dcd0ff0817a43deb11ae1e5ffde6a46 [2018-10-23 15:59:22,867 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 15:59:22,871 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 15:59:22,872 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 15:59:22,873 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 15:59:22,877 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 15:59:22,879 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 03:59:22" (1/1) ... [2018-10-23 15:59:22,882 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2419bfab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:59:22, skipping insertion in model container [2018-10-23 15:59:22,882 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 03:59:22" (1/1) ... [2018-10-23 15:59:22,895 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 15:59:22,924 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 15:59:23,089 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 15:59:23,094 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 15:59:23,112 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 15:59:23,129 INFO L193 MainTranslator]: Completed translation [2018-10-23 15:59:23,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:59:23 WrapperNode [2018-10-23 15:59:23,129 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 15:59:23,130 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 15:59:23,130 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 15:59:23,131 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 15:59:23,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:59:23" (1/1) ... [2018-10-23 15:59:23,147 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:59:23" (1/1) ... [2018-10-23 15:59:23,154 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 15:59:23,154 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 15:59:23,154 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 15:59:23,154 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 15:59:23,165 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:59:23" (1/1) ... [2018-10-23 15:59:23,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:59:23" (1/1) ... [2018-10-23 15:59:23,167 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:59:23" (1/1) ... [2018-10-23 15:59:23,167 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:59:23" (1/1) ... [2018-10-23 15:59:23,170 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:59:23" (1/1) ... [2018-10-23 15:59:23,176 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:59:23" (1/1) ... [2018-10-23 15:59:23,177 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:59:23" (1/1) ... [2018-10-23 15:59:23,179 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 15:59:23,179 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 15:59:23,180 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 15:59:23,180 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 15:59:23,181 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:59:23" (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 15:59:23,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-23 15:59:23,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-23 15:59:23,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 15:59:23,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 15:59:23,356 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-23 15:59:23,356 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-23 15:59:23,356 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-23 15:59:23,356 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-23 15:59:23,771 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 15:59:23,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 03:59:23 BoogieIcfgContainer [2018-10-23 15:59:23,773 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 15:59:23,778 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 15:59:23,778 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 15:59:23,786 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 15:59:23,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 03:59:22" (1/3) ... [2018-10-23 15:59:23,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a780ef0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 03:59:23, skipping insertion in model container [2018-10-23 15:59:23,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:59:23" (2/3) ... [2018-10-23 15:59:23,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a780ef0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 03:59:23, skipping insertion in model container [2018-10-23 15:59:23,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 03:59:23" (3/3) ... [2018-10-23 15:59:23,793 INFO L112 eAbstractionObserver]: Analyzing ICFG sum01_bug02_false-unreach-call_true-termination.i [2018-10-23 15:59:23,814 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 15:59:23,823 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 15:59:23,851 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 15:59:23,931 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 15:59:23,931 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 15:59:23,931 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 15:59:23,931 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 15:59:23,932 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 15:59:23,935 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 15:59:23,935 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 15:59:23,935 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 15:59:23,969 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-10-23 15:59:23,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-23 15:59:23,975 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:59:23,976 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 15:59:23,979 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:59:23,985 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:59:23,986 INFO L82 PathProgramCache]: Analyzing trace with hash -2007171518, now seen corresponding path program 1 times [2018-10-23 15:59:23,989 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 15:59:24,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:59:24,042 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:59:24,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:59:24,042 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 15:59:24,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:59:24,118 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 15:59:24,120 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 15:59:24,120 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-23 15:59:24,120 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 15:59:24,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-23 15:59:24,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-23 15:59:24,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-23 15:59:24,141 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2018-10-23 15:59:24,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:59:24,164 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2018-10-23 15:59:24,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-23 15:59:24,166 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-10-23 15:59:24,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:59:24,175 INFO L225 Difference]: With dead ends: 32 [2018-10-23 15:59:24,176 INFO L226 Difference]: Without dead ends: 15 [2018-10-23 15:59:24,179 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 15:59:24,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-23 15:59:24,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-23 15:59:24,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-23 15:59:24,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-10-23 15:59:24,224 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2018-10-23 15:59:24,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:59:24,226 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-10-23 15:59:24,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-23 15:59:24,226 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-10-23 15:59:24,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-23 15:59:24,227 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:59:24,227 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 15:59:24,230 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:59:24,230 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:59:24,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1715017247, now seen corresponding path program 1 times [2018-10-23 15:59:24,231 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 15:59:24,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:59:24,233 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:59:24,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:59:24,235 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 15:59:24,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:59:24,353 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 15:59:24,354 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 15:59:24,354 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-23 15:59:24,354 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 15:59:24,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 15:59:24,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 15:59:24,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-23 15:59:24,357 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2018-10-23 15:59:24,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:59:24,444 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2018-10-23 15:59:24,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 15:59:24,445 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-10-23 15:59:24,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:59:24,446 INFO L225 Difference]: With dead ends: 25 [2018-10-23 15:59:24,447 INFO L226 Difference]: Without dead ends: 20 [2018-10-23 15:59:24,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-23 15:59:24,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-23 15:59:24,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-23 15:59:24,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-23 15:59:24,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-10-23 15:59:24,454 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2018-10-23 15:59:24,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:59:24,455 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-10-23 15:59:24,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 15:59:24,455 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-10-23 15:59:24,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-23 15:59:24,456 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:59:24,457 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 15:59:24,457 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:59:24,457 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:59:24,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1428843034, now seen corresponding path program 1 times [2018-10-23 15:59:24,458 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 15:59:24,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:59:24,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:59:24,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:59:24,460 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 15:59:24,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:59:25,110 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 15:59:25,111 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:59:25,111 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 15:59:25,112 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2018-10-23 15:59:25,114 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [13], [16], [20], [22], [28], [31], [33], [39], [40], [41], [43] [2018-10-23 15:59:25,169 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-23 15:59:25,170 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-23 15:59:25,293 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-23 15:59:25,869 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-23 15:59:25,870 INFO L272 AbstractInterpreter]: Visited 15 different actions 204 times. Merged at 6 different actions 114 times. Widened at 1 different actions 15 times. Found 1 fixpoints after 1 different actions. Largest state had 7 variables. [2018-10-23 15:59:25,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:59:25,916 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-23 15:59:25,916 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:59:25,917 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG 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 15:59:25,926 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:59:25,927 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-23 15:59:25,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:59:25,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:59:26,488 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 15:59:26,488 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 15:59:26,869 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-23 15:59:27,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:59:27,312 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 15:59:27,312 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2018-10-23 15:59:27,312 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 15:59:27,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-23 15:59:27,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-23 15:59:27,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2018-10-23 15:59:27,315 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 14 states. [2018-10-23 15:59:27,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:59:27,755 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2018-10-23 15:59:27,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-23 15:59:27,756 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 16 [2018-10-23 15:59:27,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:59:27,759 INFO L225 Difference]: With dead ends: 45 [2018-10-23 15:59:27,759 INFO L226 Difference]: Without dead ends: 39 [2018-10-23 15:59:27,761 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2018-10-23 15:59:27,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-23 15:59:27,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2018-10-23 15:59:27,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-23 15:59:27,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2018-10-23 15:59:27,769 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 16 [2018-10-23 15:59:27,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:59:27,769 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2018-10-23 15:59:27,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-23 15:59:27,770 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2018-10-23 15:59:27,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-23 15:59:27,771 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:59:27,771 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 15:59:27,771 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:59:27,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:59:27,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1947322111, now seen corresponding path program 1 times [2018-10-23 15:59:27,772 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 15:59:27,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:59:27,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:59:27,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:59:27,773 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 15:59:27,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:59:27,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:59:27,862 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:59:27,862 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 15:59:27,862 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 22 with the following transitions: [2018-10-23 15:59:27,863 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [13], [16], [18], [20], [22], [28], [31], [33], [39], [40], [41], [43] [2018-10-23 15:59:27,865 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-23 15:59:27,865 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-23 15:59:27,873 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-23 15:59:28,476 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-23 15:59:28,477 INFO L272 AbstractInterpreter]: Visited 16 different actions 504 times. Merged at 7 different actions 284 times. Widened at 1 different actions 37 times. Found 38 fixpoints after 2 different actions. Largest state had 7 variables. [2018-10-23 15:59:28,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:59:28,512 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-23 15:59:28,512 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:59:28,513 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG 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 15:59:28,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:59:28,524 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-23 15:59:28,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:59:28,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:59:28,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:59:28,617 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 15:59:28,661 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:59:28,682 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 15:59:28,682 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2018-10-23 15:59:28,683 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 15:59:28,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-23 15:59:28,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-23 15:59:28,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2018-10-23 15:59:28,684 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 8 states. [2018-10-23 15:59:28,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:59:28,741 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2018-10-23 15:59:28,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 15:59:28,741 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2018-10-23 15:59:28,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:59:28,742 INFO L225 Difference]: With dead ends: 42 [2018-10-23 15:59:28,742 INFO L226 Difference]: Without dead ends: 27 [2018-10-23 15:59:28,743 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2018-10-23 15:59:28,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-23 15:59:28,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-23 15:59:28,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-23 15:59:28,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-10-23 15:59:28,748 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 21 [2018-10-23 15:59:28,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:59:28,749 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-10-23 15:59:28,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-23 15:59:28,749 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-10-23 15:59:28,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-23 15:59:28,750 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:59:28,750 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 15:59:28,750 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:59:28,751 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:59:28,751 INFO L82 PathProgramCache]: Analyzing trace with hash 994455866, now seen corresponding path program 2 times [2018-10-23 15:59:28,751 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 15:59:28,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:59:28,752 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:59:28,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:59:28,752 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 15:59:28,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:59:29,087 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-23 15:59:29,088 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:59:29,088 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 15:59:29,088 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 15:59:29,088 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 15:59:29,088 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:59:29,088 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG 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 15:59:29,097 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 15:59:29,097 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-23 15:59:29,119 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-23 15:59:29,120 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:59:29,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:59:29,562 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:59:29,562 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 15:59:30,187 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:59:30,207 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 15:59:30,208 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 30 [2018-10-23 15:59:30,208 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 15:59:30,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-23 15:59:30,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-23 15:59:30,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2018-10-23 15:59:30,210 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 19 states. [2018-10-23 15:59:31,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:59:31,157 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2018-10-23 15:59:31,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-23 15:59:31,163 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 26 [2018-10-23 15:59:31,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:59:31,164 INFO L225 Difference]: With dead ends: 50 [2018-10-23 15:59:31,164 INFO L226 Difference]: Without dead ends: 44 [2018-10-23 15:59:31,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=288, Invalid=1604, Unknown=0, NotChecked=0, Total=1892 [2018-10-23 15:59:31,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-23 15:59:31,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 28. [2018-10-23 15:59:31,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-23 15:59:31,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-10-23 15:59:31,172 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 26 [2018-10-23 15:59:31,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:59:31,172 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-10-23 15:59:31,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-23 15:59:31,173 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-10-23 15:59:31,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-23 15:59:31,174 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:59:31,174 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 15:59:31,174 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:59:31,174 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:59:31,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1674514236, now seen corresponding path program 2 times [2018-10-23 15:59:31,175 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 15:59:31,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:59:31,177 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:59:31,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:59:31,177 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 15:59:31,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:59:31,270 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:59:31,270 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:59:31,270 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 15:59:31,271 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 15:59:31,271 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 15:59:31,271 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:59:31,271 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG 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 15:59:31,279 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 15:59:31,280 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-23 15:59:31,296 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-23 15:59:31,296 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:59:31,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:59:31,406 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:59:31,407 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 15:59:31,498 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:59:31,528 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 15:59:31,529 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2018-10-23 15:59:31,529 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 15:59:31,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-23 15:59:31,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-23 15:59:31,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=130, Unknown=0, NotChecked=0, Total=240 [2018-10-23 15:59:31,530 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 12 states. [2018-10-23 15:59:31,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:59:31,623 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2018-10-23 15:59:31,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 15:59:31,624 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2018-10-23 15:59:31,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:59:31,625 INFO L225 Difference]: With dead ends: 44 [2018-10-23 15:59:31,625 INFO L226 Difference]: Without dead ends: 34 [2018-10-23 15:59:31,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=130, Unknown=0, NotChecked=0, Total=240 [2018-10-23 15:59:31,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-23 15:59:31,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-10-23 15:59:31,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-23 15:59:31,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2018-10-23 15:59:31,632 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 26 [2018-10-23 15:59:31,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:59:31,632 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2018-10-23 15:59:31,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-23 15:59:31,632 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2018-10-23 15:59:31,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-23 15:59:31,633 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:59:31,634 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 15:59:31,634 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:59:31,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:59:31,634 INFO L82 PathProgramCache]: Analyzing trace with hash 162653665, now seen corresponding path program 3 times [2018-10-23 15:59:31,635 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 15:59:31,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:59:31,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:59:31,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:59:31,636 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 15:59:31,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:59:31,728 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:59:31,729 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:59:31,729 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 15:59:31,729 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 15:59:31,729 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 15:59:31,729 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:59:31,730 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG 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 15:59:31,738 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 15:59:31,738 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-23 15:59:31,759 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 15:59:31,760 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:59:31,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:59:31,862 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:59:31,863 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 15:59:31,943 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:59:31,965 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 15:59:31,965 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2018-10-23 15:59:31,965 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 15:59:31,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-23 15:59:31,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-23 15:59:31,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=174, Unknown=0, NotChecked=0, Total=306 [2018-10-23 15:59:31,967 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 16 states. [2018-10-23 15:59:32,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:59:32,078 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2018-10-23 15:59:32,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-23 15:59:32,080 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2018-10-23 15:59:32,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:59:32,081 INFO L225 Difference]: With dead ends: 49 [2018-10-23 15:59:32,081 INFO L226 Difference]: Without dead ends: 39 [2018-10-23 15:59:32,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=174, Unknown=0, NotChecked=0, Total=306 [2018-10-23 15:59:32,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-23 15:59:32,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2018-10-23 15:59:32,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-23 15:59:32,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-10-23 15:59:32,088 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 31 [2018-10-23 15:59:32,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:59:32,088 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-10-23 15:59:32,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-23 15:59:32,089 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-10-23 15:59:32,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-23 15:59:32,090 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:59:32,090 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 15:59:32,090 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:59:32,104 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:59:32,104 INFO L82 PathProgramCache]: Analyzing trace with hash 129265244, now seen corresponding path program 4 times [2018-10-23 15:59:32,104 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 15:59:32,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:59:32,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:59:32,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:59:32,108 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 15:59:32,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:59:32,359 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:59:32,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:59:32,359 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 15:59:32,359 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 15:59:32,360 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 15:59:32,360 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:59:32,360 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG 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 15:59:32,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:59:32,368 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-23 15:59:32,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:59:32,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:59:32,481 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:59:32,482 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 15:59:32,579 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:59:32,600 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 15:59:32,601 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2018-10-23 15:59:32,601 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 15:59:32,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-23 15:59:32,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-23 15:59:32,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-10-23 15:59:32,602 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 20 states. [2018-10-23 15:59:33,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:59:33,103 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2018-10-23 15:59:33,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-23 15:59:33,103 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 36 [2018-10-23 15:59:33,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:59:33,104 INFO L225 Difference]: With dead ends: 55 [2018-10-23 15:59:33,105 INFO L226 Difference]: Without dead ends: 45 [2018-10-23 15:59:33,105 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 55 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-10-23 15:59:33,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-23 15:59:33,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2018-10-23 15:59:33,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-23 15:59:33,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2018-10-23 15:59:33,111 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 36 [2018-10-23 15:59:33,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:59:33,112 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2018-10-23 15:59:33,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-23 15:59:33,112 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2018-10-23 15:59:33,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-23 15:59:33,113 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:59:33,114 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 15:59:33,114 INFO L424 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:59:33,114 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:59:33,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1609235137, now seen corresponding path program 5 times [2018-10-23 15:59:33,114 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 15:59:33,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:59:33,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:59:33,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:59:33,116 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 15:59:33,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-23 15:59:33,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-23 15:59:33,164 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-23 15:59:33,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 03:59:33 BoogieIcfgContainer [2018-10-23 15:59:33,199 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 15:59:33,200 INFO L168 Benchmark]: Toolchain (without parser) took 10332.86 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 891.8 MB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -876.6 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. [2018-10-23 15:59:33,202 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 15:59:33,202 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.46 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. [2018-10-23 15:59:33,203 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.53 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. [2018-10-23 15:59:33,203 INFO L168 Benchmark]: Boogie Preprocessor took 24.81 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. [2018-10-23 15:59:33,204 INFO L168 Benchmark]: RCFGBuilder took 594.41 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 777.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -826.6 MB). Peak memory consumption was 26.5 MB. Max. memory is 7.1 GB. [2018-10-23 15:59:33,205 INFO L168 Benchmark]: TraceAbstraction took 9421.41 ms. Allocated memory was 2.3 GB in the beginning and 2.4 GB in the end (delta: 114.3 MB). Free memory was 2.2 GB in the beginning and 2.3 GB in the end (delta: -60.6 MB). Peak memory consumption was 53.7 MB. Max. memory is 7.1 GB. [2018-10-23 15:59:33,210 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 257.46 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 23.53 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 24.81 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 594.41 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 777.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -826.6 MB). Peak memory consumption was 26.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9421.41 ms. Allocated memory was 2.3 GB in the beginning and 2.4 GB in the end (delta: 114.3 MB). Free memory was 2.2 GB in the beginning and 2.3 GB in the end (delta: -60.6 MB). Peak memory consumption was 53.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 VAL [i=1, j=10, n=0, n=6] [L13] COND TRUE i<=n VAL [i=1, j=10, n=6, n=0] [L14] COND TRUE i