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-EXP.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label14_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 08:31:08,677 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 08:31:08,680 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 08:31:08,696 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 08:31:08,697 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 08:31:08,698 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 08:31:08,699 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 08:31:08,702 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 08:31:08,705 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 08:31:08,706 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 08:31:08,707 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 08:31:08,711 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 08:31:08,712 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 08:31:08,713 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 08:31:08,718 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 08:31:08,719 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 08:31:08,719 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 08:31:08,723 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 08:31:08,728 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 08:31:08,729 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 08:31:08,732 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 08:31:08,734 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 08:31:08,736 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-27 08:31:08,751 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-10-27 08:31:08,768 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 08:31:08,768 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 08:31:08,769 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 08:31:08,769 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 08:31:08,769 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 08:31:08,769 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 08:31:08,769 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-27 08:31:08,770 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 08:31:08,770 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 08:31:08,770 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 08:31:08,770 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 08:31:08,770 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 08:31:08,771 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 08:31:08,771 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-27 08:31:08,771 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 08:31:08,772 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 08:31:08,772 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 08:31:08,772 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 08:31:08,772 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 08:31:08,772 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 08:31:08,773 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 08:31:08,773 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 08:31:08,773 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 08:31:08,773 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 08:31:08,773 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 08:31:08,774 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 08:31:08,774 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 08:31:08,774 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 08:31:08,774 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 08:31:08,774 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 08:31:08,775 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 08:31:08,775 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 08:31:08,775 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 08:31:08,775 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 08:31:08,775 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 08:31:08,775 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 08:31:08,818 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 08:31:08,835 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 08:31:08,839 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 08:31:08,841 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 08:31:08,841 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 08:31:08,842 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label14_true-unreach-call.c [2018-10-27 08:31:08,909 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/7ff655800/e41bd1d052c44ea2a74c84e7b0a6f44d/FLAG01032e02d [2018-10-27 08:31:09,673 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 08:31:09,674 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label14_true-unreach-call.c [2018-10-27 08:31:09,702 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/7ff655800/e41bd1d052c44ea2a74c84e7b0a6f44d/FLAG01032e02d [2018-10-27 08:31:09,723 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/7ff655800/e41bd1d052c44ea2a74c84e7b0a6f44d [2018-10-27 08:31:09,735 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 08:31:09,737 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 08:31:09,738 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 08:31:09,738 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 08:31:09,744 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 08:31:09,745 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:31:09" (1/1) ... [2018-10-27 08:31:09,749 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31cb433d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:31:09, skipping insertion in model container [2018-10-27 08:31:09,749 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:31:09" (1/1) ... [2018-10-27 08:31:09,760 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 08:31:09,889 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 08:31:10,945 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 08:31:10,950 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 08:31:11,401 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 08:31:11,424 INFO L193 MainTranslator]: Completed translation [2018-10-27 08:31:11,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:31:11 WrapperNode [2018-10-27 08:31:11,425 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 08:31:11,426 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 08:31:11,426 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 08:31:11,426 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 08:31:11,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:31:11" (1/1) ... [2018-10-27 08:31:11,496 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:31:11" (1/1) ... [2018-10-27 08:31:11,893 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 08:31:11,893 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 08:31:11,894 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 08:31:11,894 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 08:31:11,904 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:31:11" (1/1) ... [2018-10-27 08:31:11,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:31:11" (1/1) ... [2018-10-27 08:31:11,934 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:31:11" (1/1) ... [2018-10-27 08:31:11,934 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:31:11" (1/1) ... [2018-10-27 08:31:12,028 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:31:11" (1/1) ... [2018-10-27 08:31:12,050 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:31:11" (1/1) ... [2018-10-27 08:31:12,088 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:31:11" (1/1) ... [2018-10-27 08:31:12,136 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 08:31:12,136 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 08:31:12,136 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 08:31:12,136 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 08:31:12,137 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:31:11" (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 [2018-10-27 08:31:12,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 08:31:12,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 08:31:12,213 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-27 08:31:12,213 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-27 08:31:12,213 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 08:31:12,213 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 08:31:12,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 08:31:12,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 08:31:12,215 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 08:31:12,215 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 08:31:26,751 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 08:31:26,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:31:26 BoogieIcfgContainer [2018-10-27 08:31:26,752 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 08:31:26,755 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 08:31:26,755 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 08:31:26,758 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 08:31:26,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:31:09" (1/3) ... [2018-10-27 08:31:26,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9acdce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:31:26, skipping insertion in model container [2018-10-27 08:31:26,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:31:11" (2/3) ... [2018-10-27 08:31:26,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9acdce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:31:26, skipping insertion in model container [2018-10-27 08:31:26,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:31:26" (3/3) ... [2018-10-27 08:31:26,762 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label14_true-unreach-call.c [2018-10-27 08:31:26,771 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 08:31:26,780 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 08:31:26,798 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 08:31:26,844 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 08:31:26,844 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 08:31:26,845 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 08:31:26,845 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 08:31:26,845 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 08:31:26,845 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 08:31:26,845 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 08:31:26,845 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 08:31:26,880 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-10-27 08:31:26,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-27 08:31:26,890 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:31:26,892 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:31:26,894 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:31:26,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:31:26,901 INFO L82 PathProgramCache]: Analyzing trace with hash 104391076, now seen corresponding path program 1 times [2018-10-27 08:31:26,903 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:31:26,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:31:26,953 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:31:26,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:31:26,953 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:31:27,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:31:27,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:31:27,402 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 08:31:27,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 08:31:27,403 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:31:27,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 08:31:27,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 08:31:27,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 08:31:27,427 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-10-27 08:31:37,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:31:37,346 INFO L93 Difference]: Finished difference Result 2162 states and 4007 transitions. [2018-10-27 08:31:37,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 08:31:37,353 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2018-10-27 08:31:37,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:31:37,390 INFO L225 Difference]: With dead ends: 2162 [2018-10-27 08:31:37,390 INFO L226 Difference]: Without dead ends: 1552 [2018-10-27 08:31:37,404 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 08:31:37,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2018-10-27 08:31:37,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1525. [2018-10-27 08:31:37,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1525 states. [2018-10-27 08:31:37,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 2696 transitions. [2018-10-27 08:31:37,559 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 2696 transitions. Word has length 54 [2018-10-27 08:31:37,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:31:37,560 INFO L481 AbstractCegarLoop]: Abstraction has 1525 states and 2696 transitions. [2018-10-27 08:31:37,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 08:31:37,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 2696 transitions. [2018-10-27 08:31:37,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-27 08:31:37,579 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:31:37,579 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:31:37,580 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:31:37,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:31:37,581 INFO L82 PathProgramCache]: Analyzing trace with hash -733218574, now seen corresponding path program 1 times [2018-10-27 08:31:37,581 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:31:37,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:31:37,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:31:37,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:31:37,584 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:31:37,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:31:37,869 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:31:37,869 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 08:31:37,869 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 08:31:37,869 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:31:37,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 08:31:37,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 08:31:37,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-27 08:31:37,872 INFO L87 Difference]: Start difference. First operand 1525 states and 2696 transitions. Second operand 6 states. [2018-10-27 08:32:02,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:32:02,978 INFO L93 Difference]: Finished difference Result 5787 states and 10682 transitions. [2018-10-27 08:32:02,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 08:32:02,980 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 133 [2018-10-27 08:32:02,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:32:03,017 INFO L225 Difference]: With dead ends: 5787 [2018-10-27 08:32:03,017 INFO L226 Difference]: Without dead ends: 4268 [2018-10-27 08:32:03,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-27 08:32:03,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4268 states. [2018-10-27 08:32:03,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4268 to 4242. [2018-10-27 08:32:03,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4242 states. [2018-10-27 08:32:03,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4242 states to 4242 states and 6360 transitions. [2018-10-27 08:32:03,184 INFO L78 Accepts]: Start accepts. Automaton has 4242 states and 6360 transitions. Word has length 133 [2018-10-27 08:32:03,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:32:03,184 INFO L481 AbstractCegarLoop]: Abstraction has 4242 states and 6360 transitions. [2018-10-27 08:32:03,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 08:32:03,185 INFO L276 IsEmpty]: Start isEmpty. Operand 4242 states and 6360 transitions. [2018-10-27 08:32:03,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-27 08:32:03,190 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:32:03,191 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:32:03,191 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:32:03,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:32:03,191 INFO L82 PathProgramCache]: Analyzing trace with hash 9362786, now seen corresponding path program 1 times [2018-10-27 08:32:03,192 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:32:03,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:32:03,193 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:32:03,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:32:03,193 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:32:03,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:32:03,455 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:32:03,456 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 08:32:03,456 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 08:32:03,456 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:32:03,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 08:32:03,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 08:32:03,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 08:32:03,458 INFO L87 Difference]: Start difference. First operand 4242 states and 6360 transitions. Second operand 6 states. [2018-10-27 08:32:10,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:32:10,995 INFO L93 Difference]: Finished difference Result 12710 states and 20700 transitions. [2018-10-27 08:32:10,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 08:32:10,996 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 134 [2018-10-27 08:32:10,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:32:11,063 INFO L225 Difference]: With dead ends: 12710 [2018-10-27 08:32:11,063 INFO L226 Difference]: Without dead ends: 8474 [2018-10-27 08:32:11,090 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 08:32:11,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8474 states. [2018-10-27 08:32:11,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8474 to 8389. [2018-10-27 08:32:11,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8389 states. [2018-10-27 08:32:11,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8389 states to 8389 states and 12579 transitions. [2018-10-27 08:32:11,375 INFO L78 Accepts]: Start accepts. Automaton has 8389 states and 12579 transitions. Word has length 134 [2018-10-27 08:32:11,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:32:11,376 INFO L481 AbstractCegarLoop]: Abstraction has 8389 states and 12579 transitions. [2018-10-27 08:32:11,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 08:32:11,376 INFO L276 IsEmpty]: Start isEmpty. Operand 8389 states and 12579 transitions. [2018-10-27 08:32:11,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-10-27 08:32:11,381 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:32:11,381 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:32:11,381 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:32:11,382 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:32:11,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1511832028, now seen corresponding path program 1 times [2018-10-27 08:32:11,382 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:32:11,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:32:11,383 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:32:11,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:32:11,383 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:32:11,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:32:11,714 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 08:32:11,975 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 95 proven. 5 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-10-27 08:32:11,975 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:32:11,975 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:32:11,976 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 209 with the following transitions: [2018-10-27 08:32:11,978 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1042], [1044], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [1224], [1228], [1232], [1236], [1239], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 08:32:12,023 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:32:12,023 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:32:13,047 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:32:13,049 INFO L272 AbstractInterpreter]: Visited 88 different actions 250 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-27 08:32:13,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:32:13,085 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:32:13,086 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:32:13,086 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 [2018-10-27 08:32:13,103 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:32:13,103 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:32:13,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:32:13,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:32:13,752 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 167 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:32:13,753 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:32:14,575 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 167 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:32:14,609 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 08:32:14,610 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-10-27 08:32:14,610 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 08:32:14,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 08:32:14,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 08:32:14,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-10-27 08:32:14,612 INFO L87 Difference]: Start difference. First operand 8389 states and 12579 transitions. Second operand 9 states. [2018-10-27 08:32:26,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:32:26,905 INFO L93 Difference]: Finished difference Result 20877 states and 31718 transitions. [2018-10-27 08:32:26,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-27 08:32:26,906 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 208 [2018-10-27 08:32:26,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:32:27,005 INFO L225 Difference]: With dead ends: 20877 [2018-10-27 08:32:27,005 INFO L226 Difference]: Without dead ends: 12459 [2018-10-27 08:32:27,066 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 414 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2018-10-27 08:32:27,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12459 states. [2018-10-27 08:32:27,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12459 to 12434. [2018-10-27 08:32:27,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12434 states. [2018-10-27 08:32:27,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12434 states to 12434 states and 16008 transitions. [2018-10-27 08:32:27,438 INFO L78 Accepts]: Start accepts. Automaton has 12434 states and 16008 transitions. Word has length 208 [2018-10-27 08:32:27,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:32:27,439 INFO L481 AbstractCegarLoop]: Abstraction has 12434 states and 16008 transitions. [2018-10-27 08:32:27,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 08:32:27,439 INFO L276 IsEmpty]: Start isEmpty. Operand 12434 states and 16008 transitions. [2018-10-27 08:32:27,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-10-27 08:32:27,445 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:32:27,445 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:32:27,446 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:32:27,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:32:27,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1311071484, now seen corresponding path program 1 times [2018-10-27 08:32:27,450 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:32:27,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:32:27,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:32:27,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:32:27,451 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:32:27,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:32:27,836 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-10-27 08:32:27,837 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 08:32:27,837 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 08:32:27,837 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:32:27,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 08:32:27,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 08:32:27,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 08:32:27,838 INFO L87 Difference]: Start difference. First operand 12434 states and 16008 transitions. Second operand 4 states. [2018-10-27 08:32:36,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:32:36,791 INFO L93 Difference]: Finished difference Result 32381 states and 44190 transitions. [2018-10-27 08:32:36,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 08:32:36,792 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 221 [2018-10-27 08:32:36,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:32:36,867 INFO L225 Difference]: With dead ends: 32381 [2018-10-27 08:32:36,867 INFO L226 Difference]: Without dead ends: 15847 [2018-10-27 08:32:36,951 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 08:32:36,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15847 states. [2018-10-27 08:32:37,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15847 to 13163. [2018-10-27 08:32:37,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13163 states. [2018-10-27 08:32:37,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13163 states to 13163 states and 15841 transitions. [2018-10-27 08:32:37,284 INFO L78 Accepts]: Start accepts. Automaton has 13163 states and 15841 transitions. Word has length 221 [2018-10-27 08:32:37,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:32:37,285 INFO L481 AbstractCegarLoop]: Abstraction has 13163 states and 15841 transitions. [2018-10-27 08:32:37,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 08:32:37,285 INFO L276 IsEmpty]: Start isEmpty. Operand 13163 states and 15841 transitions. [2018-10-27 08:32:37,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2018-10-27 08:32:37,291 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:32:37,292 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:32:37,292 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:32:37,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:32:37,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1606849281, now seen corresponding path program 1 times [2018-10-27 08:32:37,293 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:32:37,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:32:37,294 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:32:37,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:32:37,294 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:32:37,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:32:37,913 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 95 proven. 59 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-10-27 08:32:37,913 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:32:37,913 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:32:37,913 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 285 with the following transitions: [2018-10-27 08:32:37,914 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1042], [1044], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1547], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 08:32:37,921 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:32:37,921 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:32:38,441 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:32:38,441 INFO L272 AbstractInterpreter]: Visited 151 different actions 301 times. Merged at 7 different actions 11 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 26 variables. [2018-10-27 08:32:38,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:32:38,479 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:32:38,479 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:32:38,479 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 [2018-10-27 08:32:38,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:32:38,497 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:32:38,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:32:38,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:32:39,326 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 17 [2018-10-27 08:32:40,015 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 99 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-10-27 08:32:40,015 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:32:43,333 WARN L179 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2018-10-27 08:32:43,971 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 99 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:32:44,005 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 08:32:44,005 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 18 [2018-10-27 08:32:44,005 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 08:32:44,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-27 08:32:44,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-27 08:32:44,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2018-10-27 08:32:44,007 INFO L87 Difference]: Start difference. First operand 13163 states and 15841 transitions. Second operand 13 states. [2018-10-27 08:33:47,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:33:47,493 INFO L93 Difference]: Finished difference Result 89524 states and 113590 transitions. [2018-10-27 08:33:47,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-10-27 08:33:47,494 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 284 [2018-10-27 08:33:47,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:33:48,180 INFO L225 Difference]: With dead ends: 89524 [2018-10-27 08:33:48,180 INFO L226 Difference]: Without dead ends: 65035 [2018-10-27 08:33:48,275 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 696 GetRequests, 561 SyntacticMatches, 2 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6754 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=2610, Invalid=15480, Unknown=0, NotChecked=0, Total=18090 [2018-10-27 08:33:48,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65035 states. [2018-10-27 08:33:49,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65035 to 59058. [2018-10-27 08:33:49,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59058 states. [2018-10-27 08:33:49,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59058 states to 59058 states and 69421 transitions. [2018-10-27 08:33:49,625 INFO L78 Accepts]: Start accepts. Automaton has 59058 states and 69421 transitions. Word has length 284 [2018-10-27 08:33:49,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:33:49,626 INFO L481 AbstractCegarLoop]: Abstraction has 59058 states and 69421 transitions. [2018-10-27 08:33:49,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-27 08:33:49,626 INFO L276 IsEmpty]: Start isEmpty. Operand 59058 states and 69421 transitions. [2018-10-27 08:33:49,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2018-10-27 08:33:49,647 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:33:49,647 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:33:49,647 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:33:49,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:33:49,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1354231450, now seen corresponding path program 1 times [2018-10-27 08:33:49,648 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:33:49,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:33:49,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:33:49,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:33:49,649 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:33:49,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:33:50,642 WARN L179 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2018-10-27 08:33:50,969 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 145 proven. 17 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2018-10-27 08:33:50,969 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:33:50,969 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:33:50,969 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 395 with the following transitions: [2018-10-27 08:33:50,970 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1042], [1044], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1547], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 08:33:50,975 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:33:50,976 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:33:51,681 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:33:51,682 INFO L272 AbstractInterpreter]: Visited 152 different actions 305 times. Merged at 8 different actions 13 times. Never widened. Found 3 fixpoints after 3 different actions. Largest state had 26 variables. [2018-10-27 08:33:51,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:33:51,718 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:33:51,718 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:33:51,718 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 [2018-10-27 08:33:51,729 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:33:51,729 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:33:51,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:33:51,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:33:52,309 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 377 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2018-10-27 08:33:52,310 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:33:52,861 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-10-27 08:33:54,025 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 147 proven. 275 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 08:33:54,046 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 08:33:54,046 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2018-10-27 08:33:54,046 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 08:33:54,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-27 08:33:54,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-27 08:33:54,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2018-10-27 08:33:54,048 INFO L87 Difference]: Start difference. First operand 59058 states and 69421 transitions. Second operand 15 states. [2018-10-27 08:34:26,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:34:26,051 INFO L93 Difference]: Finished difference Result 149106 states and 176946 transitions. [2018-10-27 08:34:26,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-27 08:34:26,052 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 394 [2018-10-27 08:34:26,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:34:26,359 INFO L225 Difference]: With dead ends: 149106 [2018-10-27 08:34:26,360 INFO L226 Difference]: Without dead ends: 83080 [2018-10-27 08:34:26,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 847 GetRequests, 780 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=904, Invalid=3518, Unknown=0, NotChecked=0, Total=4422 [2018-10-27 08:34:26,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83080 states. [2018-10-27 08:34:27,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83080 to 80717. [2018-10-27 08:34:27,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80717 states. [2018-10-27 08:34:27,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80717 states to 80717 states and 93236 transitions. [2018-10-27 08:34:27,890 INFO L78 Accepts]: Start accepts. Automaton has 80717 states and 93236 transitions. Word has length 394 [2018-10-27 08:34:27,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:34:27,891 INFO L481 AbstractCegarLoop]: Abstraction has 80717 states and 93236 transitions. [2018-10-27 08:34:27,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-27 08:34:27,891 INFO L276 IsEmpty]: Start isEmpty. Operand 80717 states and 93236 transitions. [2018-10-27 08:34:27,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2018-10-27 08:34:27,910 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:34:27,910 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:34:27,911 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:34:27,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:34:27,911 INFO L82 PathProgramCache]: Analyzing trace with hash 863350675, now seen corresponding path program 1 times [2018-10-27 08:34:27,911 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:34:27,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:34:27,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:34:27,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:34:27,912 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:34:27,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:34:28,858 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2018-10-27 08:34:28,858 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 08:34:28,858 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 08:34:28,859 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:34:28,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 08:34:28,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 08:34:28,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 08:34:28,860 INFO L87 Difference]: Start difference. First operand 80717 states and 93236 transitions. Second operand 4 states. [2018-10-27 08:34:37,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:34:37,513 INFO L93 Difference]: Finished difference Result 169907 states and 199325 transitions. [2018-10-27 08:34:37,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 08:34:37,513 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 455 [2018-10-27 08:34:37,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:34:37,809 INFO L225 Difference]: With dead ends: 169907 [2018-10-27 08:34:37,809 INFO L226 Difference]: Without dead ends: 97202 [2018-10-27 08:34:37,940 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 08:34:38,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97202 states. [2018-10-27 08:34:39,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97202 to 95892. [2018-10-27 08:34:39,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95892 states. [2018-10-27 08:34:39,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95892 states to 95892 states and 108696 transitions. [2018-10-27 08:34:39,371 INFO L78 Accepts]: Start accepts. Automaton has 95892 states and 108696 transitions. Word has length 455 [2018-10-27 08:34:39,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:34:39,372 INFO L481 AbstractCegarLoop]: Abstraction has 95892 states and 108696 transitions. [2018-10-27 08:34:39,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 08:34:39,372 INFO L276 IsEmpty]: Start isEmpty. Operand 95892 states and 108696 transitions. [2018-10-27 08:34:39,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2018-10-27 08:34:39,410 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:34:39,411 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:34:39,411 INFO L424 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:34:39,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:34:39,412 INFO L82 PathProgramCache]: Analyzing trace with hash 911489126, now seen corresponding path program 1 times [2018-10-27 08:34:39,412 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:34:39,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:34:39,413 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:34:39,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:34:39,413 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:34:39,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:34:40,147 WARN L179 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-10-27 08:34:41,327 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 453 proven. 121 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2018-10-27 08:34:41,327 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:34:41,327 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:34:41,328 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 543 with the following transitions: [2018-10-27 08:34:41,328 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1042], [1044], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1239], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1478], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1759], [1763], [1767], [1771], [1775], [1779], [1783], [1787], [1791], [1795], [1799], [1803], [1806], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 08:34:41,333 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:34:41,334 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:34:41,838 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:34:41,839 INFO L272 AbstractInterpreter]: Visited 202 different actions 406 times. Merged at 8 different actions 14 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 26 variables. [2018-10-27 08:34:41,875 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:34:41,875 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:34:41,875 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:34:41,876 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 [2018-10-27 08:34:41,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:34:41,895 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:34:42,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:34:42,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:34:42,286 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 197 proven. 0 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2018-10-27 08:34:42,286 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:34:42,477 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 197 proven. 0 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2018-10-27 08:34:42,499 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-27 08:34:42,499 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2018-10-27 08:34:42,499 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:34:42,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 08:34:42,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 08:34:42,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-10-27 08:34:42,500 INFO L87 Difference]: Start difference. First operand 95892 states and 108696 transitions. Second operand 3 states. [2018-10-27 08:34:45,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:34:45,565 INFO L93 Difference]: Finished difference Result 171858 states and 196335 transitions. [2018-10-27 08:34:45,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 08:34:45,565 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 542 [2018-10-27 08:34:45,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:34:45,789 INFO L225 Difference]: With dead ends: 171858 [2018-10-27 08:34:45,789 INFO L226 Difference]: Without dead ends: 89137 [2018-10-27 08:34:45,914 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1094 GetRequests, 1085 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-10-27 08:34:45,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89137 states. [2018-10-27 08:34:47,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89137 to 86596. [2018-10-27 08:34:47,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86596 states. [2018-10-27 08:34:47,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86596 states to 86596 states and 98487 transitions. [2018-10-27 08:34:47,823 INFO L78 Accepts]: Start accepts. Automaton has 86596 states and 98487 transitions. Word has length 542 [2018-10-27 08:34:47,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:34:47,825 INFO L481 AbstractCegarLoop]: Abstraction has 86596 states and 98487 transitions. [2018-10-27 08:34:47,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 08:34:47,825 INFO L276 IsEmpty]: Start isEmpty. Operand 86596 states and 98487 transitions. [2018-10-27 08:34:47,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 620 [2018-10-27 08:34:47,879 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:34:47,880 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:34:47,880 INFO L424 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:34:47,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:34:47,880 INFO L82 PathProgramCache]: Analyzing trace with hash 357807604, now seen corresponding path program 1 times [2018-10-27 08:34:47,881 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:34:47,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:34:47,881 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:34:47,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:34:47,882 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:34:47,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:34:49,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 770 proven. 6 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2018-10-27 08:34:49,013 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:34:49,013 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:34:49,014 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 620 with the following transitions: [2018-10-27 08:34:49,014 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1042], [1044], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1231], [1232], [1236], [1239], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1478], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1759], [1763], [1767], [1771], [1775], [1779], [1783], [1787], [1791], [1795], [1799], [1803], [1806], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 08:34:49,019 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:34:49,020 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:34:49,536 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:34:49,536 INFO L272 AbstractInterpreter]: Visited 203 different actions 407 times. Merged at 8 different actions 13 times. Never widened. Found 5 fixpoints after 5 different actions. Largest state had 26 variables. [2018-10-27 08:34:49,576 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:34:49,576 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:34:49,576 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:34:49,576 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 [2018-10-27 08:34:49,590 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:34:49,590 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:34:49,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:34:49,781 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:34:50,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 770 proven. 6 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2018-10-27 08:34:50,222 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:34:51,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 770 proven. 76 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2018-10-27 08:34:51,302 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 08:34:51,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 13 [2018-10-27 08:34:51,302 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 08:34:51,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-27 08:34:51,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-27 08:34:51,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-10-27 08:34:51,304 INFO L87 Difference]: Start difference. First operand 86596 states and 98487 transitions. Second operand 8 states. Received shutdown request... [2018-10-27 08:35:01,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-27 08:35:01,976 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-27 08:35:01,982 WARN L205 ceAbstractionStarter]: Timeout [2018-10-27 08:35:01,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 08:35:01 BoogieIcfgContainer [2018-10-27 08:35:01,982 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 08:35:01,983 INFO L168 Benchmark]: Toolchain (without parser) took 232247.90 ms. Allocated memory was 1.5 GB in the beginning and 3.8 GB in the end (delta: 2.2 GB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -433.4 MB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. [2018-10-27 08:35:01,984 INFO L168 Benchmark]: CDTParser took 0.20 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. [2018-10-27 08:35:01,985 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1686.84 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. [2018-10-27 08:35:01,986 INFO L168 Benchmark]: Boogie Procedure Inliner took 467.58 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 770.7 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -931.6 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. [2018-10-27 08:35:01,987 INFO L168 Benchmark]: Boogie Preprocessor took 242.47 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 7.1 GB. [2018-10-27 08:35:01,988 INFO L168 Benchmark]: RCFGBuilder took 14617.52 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 474.4 MB). Peak memory consumption was 474.4 MB. Max. memory is 7.1 GB. [2018-10-27 08:35:01,989 INFO L168 Benchmark]: TraceAbstraction took 215227.79 ms. Allocated memory was 2.3 GB in the beginning and 3.8 GB in the end (delta: 1.5 GB). Free memory was 1.7 GB in the beginning and 1.8 GB in the end (delta: -141.4 MB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. [2018-10-27 08:35:02,000 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 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 1686.84 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 467.58 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 770.7 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -931.6 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 242.47 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 14617.52 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 474.4 MB). Peak memory consumption was 474.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 215227.79 ms. Allocated memory was 2.3 GB in the beginning and 3.8 GB in the end (delta: 1.5 GB). Free memory was 1.7 GB in the beginning and 1.8 GB in the end (delta: -141.4 MB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 149]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 149). Cancelled while BasicCegarLoop was constructing difference of abstraction (86596states) and FLOYD_HOARE automaton (currently 18 states, 8 states before enhancement),while ReachableStatesComputation was computing reachable states (31587 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 215.1s OverallTime, 10 OverallIterations, 6 TraceHistogramMax, 184.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2846 SDtfs, 37133 SDslu, 4223 SDs, 0 SdLazy, 65729 SolverSat, 10956 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 154.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4373 GetRequests, 4100 SyntacticMatches, 11 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8099 ImplicationChecksByTransitivity, 14.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=95892occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 3.5s AbstIntTime, 5 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 7.3s AutomataMinimizationTime, 9 MinimizatonAttempts, 15038 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 16.0s InterpolantComputationTime, 5091 NumberOfCodeBlocks, 5091 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 7118 ConstructedInterpolants, 196 QuantifiedInterpolants, 10841218 SizeOfPredicates, 8 NumberOfNonLiveVariables, 3244 ConjunctsInSsa, 39 ConjunctsInUnsatCore, 20 InterpolantComputations, 7 PerfectInterpolantSequences, 7866/8522 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown