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/eca-rers2012/Problem12_label01_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 21:16:51,893 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 21:16:51,896 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 21:16:51,913 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 21:16:51,914 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 21:16:51,915 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 21:16:51,917 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 21:16:51,919 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 21:16:51,921 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 21:16:51,922 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 21:16:51,930 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 21:16:51,930 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 21:16:51,932 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 21:16:51,933 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 21:16:51,935 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 21:16:51,936 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 21:16:51,937 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 21:16:51,939 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 21:16:51,944 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 21:16:51,947 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 21:16:51,950 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 21:16:51,952 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 21:16:51,957 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 21:16:51,969 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 [2018-10-24 21:16:51,990 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 21:16:51,990 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 21:16:51,991 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 21:16:51,991 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-24 21:16:51,992 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-24 21:16:51,992 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-24 21:16:51,992 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-24 21:16:51,992 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-24 21:16:51,993 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-24 21:16:51,993 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-24 21:16:51,993 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-24 21:16:51,993 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-24 21:16:51,994 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 21:16:51,994 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 21:16:51,994 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 21:16:51,994 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 21:16:51,994 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 21:16:51,995 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 21:16:51,995 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 21:16:51,995 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 21:16:51,995 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 21:16:51,996 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 21:16:51,996 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 21:16:51,996 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 21:16:51,996 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 21:16:51,996 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 21:16:51,997 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 21:16:51,997 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 21:16:51,997 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-24 21:16:51,997 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 21:16:51,997 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 21:16:51,997 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 21:16:51,998 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 21:16:51,998 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-24 21:16:52,045 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 21:16:52,058 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 21:16:52,063 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 21:16:52,064 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 21:16:52,065 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 21:16:52,066 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label01_true-unreach-call.c [2018-10-24 21:16:52,144 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/cde058749/e6637360cb1543ceae061d2033ea2934/FLAGb2160d38c [2018-10-24 21:16:52,934 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 21:16:52,935 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label01_true-unreach-call.c [2018-10-24 21:16:52,971 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/cde058749/e6637360cb1543ceae061d2033ea2934/FLAGb2160d38c [2018-10-24 21:16:52,990 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/cde058749/e6637360cb1543ceae061d2033ea2934 [2018-10-24 21:16:53,004 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 21:16:53,006 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 21:16:53,007 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 21:16:53,007 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 21:16:53,013 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 21:16:53,015 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 09:16:52" (1/1) ... [2018-10-24 21:16:53,018 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c3249d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:16:53, skipping insertion in model container [2018-10-24 21:16:53,018 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 09:16:52" (1/1) ... [2018-10-24 21:16:53,030 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 21:16:53,208 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 21:16:54,615 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 21:16:54,621 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 21:16:55,263 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 21:16:55,299 INFO L193 MainTranslator]: Completed translation [2018-10-24 21:16:55,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:16:55 WrapperNode [2018-10-24 21:16:55,300 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 21:16:55,301 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 21:16:55,301 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 21:16:55,301 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 21:16:55,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:16:55" (1/1) ... [2018-10-24 21:16:55,379 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:16:55" (1/1) ... [2018-10-24 21:16:55,838 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 21:16:55,839 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 21:16:55,839 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 21:16:55,839 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 21:16:55,850 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:16:55" (1/1) ... [2018-10-24 21:16:55,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:16:55" (1/1) ... [2018-10-24 21:16:55,880 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:16:55" (1/1) ... [2018-10-24 21:16:55,880 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:16:55" (1/1) ... [2018-10-24 21:16:55,990 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:16:55" (1/1) ... [2018-10-24 21:16:56,035 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:16:55" (1/1) ... [2018-10-24 21:16:56,080 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:16:55" (1/1) ... [2018-10-24 21:16:56,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 21:16:56,135 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 21:16:56,135 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 21:16:56,135 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 21:16:56,136 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:16:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 21:16:56,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-24 21:16:56,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-24 21:16:56,215 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-10-24 21:16:56,215 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-10-24 21:16:56,215 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-10-24 21:16:56,215 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-10-24 21:16:56,215 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-24 21:16:56,216 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-24 21:16:56,216 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-24 21:16:56,216 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-24 21:16:56,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 21:16:56,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 21:16:56,218 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-24 21:16:56,218 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-24 21:17:08,736 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 21:17:08,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 09:17:08 BoogieIcfgContainer [2018-10-24 21:17:08,737 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 21:17:08,739 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 21:17:08,739 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 21:17:08,742 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 21:17:08,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 09:16:52" (1/3) ... [2018-10-24 21:17:08,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5434485a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 09:17:08, skipping insertion in model container [2018-10-24 21:17:08,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:16:55" (2/3) ... [2018-10-24 21:17:08,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5434485a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 09:17:08, skipping insertion in model container [2018-10-24 21:17:08,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 09:17:08" (3/3) ... [2018-10-24 21:17:08,746 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label01_true-unreach-call.c [2018-10-24 21:17:08,756 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 21:17:08,766 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 21:17:08,783 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 21:17:08,831 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 21:17:08,831 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 21:17:08,831 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 21:17:08,831 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 21:17:08,831 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 21:17:08,832 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 21:17:08,832 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 21:17:08,832 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 21:17:08,873 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states. [2018-10-24 21:17:08,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-24 21:17:08,884 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 21:17:08,886 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] [2018-10-24 21:17:08,889 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 21:17:08,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 21:17:08,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1285582812, now seen corresponding path program 1 times [2018-10-24 21:17:08,900 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 21:17:08,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 21:17:08,962 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 21:17:08,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 21:17:08,963 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 21:17:09,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 21:17:09,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 21:17:09,505 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 21:17:09,505 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 21:17:09,506 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 21:17:09,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 21:17:09,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 21:17:09,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 21:17:09,533 INFO L87 Difference]: Start difference. First operand 840 states. Second operand 3 states. [2018-10-24 21:17:20,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 21:17:20,368 INFO L93 Difference]: Finished difference Result 2446 states and 4700 transitions. [2018-10-24 21:17:20,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 21:17:20,371 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2018-10-24 21:17:20,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 21:17:20,408 INFO L225 Difference]: With dead ends: 2446 [2018-10-24 21:17:20,408 INFO L226 Difference]: Without dead ends: 1604 [2018-10-24 21:17:20,424 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 21:17:20,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2018-10-24 21:17:20,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1604. [2018-10-24 21:17:20,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1604 states. [2018-10-24 21:17:20,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 3021 transitions. [2018-10-24 21:17:20,604 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 3021 transitions. Word has length 54 [2018-10-24 21:17:20,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 21:17:20,605 INFO L481 AbstractCegarLoop]: Abstraction has 1604 states and 3021 transitions. [2018-10-24 21:17:20,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 21:17:20,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 3021 transitions. [2018-10-24 21:17:20,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-24 21:17:20,618 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 21:17:20,618 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] [2018-10-24 21:17:20,622 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 21:17:20,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 21:17:20,623 INFO L82 PathProgramCache]: Analyzing trace with hash -175316350, now seen corresponding path program 1 times [2018-10-24 21:17:20,623 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 21:17:20,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 21:17:20,625 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 21:17:20,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 21:17:20,626 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 21:17:20,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 21:17:21,035 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 21:17:21,035 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 21:17:21,036 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 21:17:21,036 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 21:17:21,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 21:17:21,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 21:17:21,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 21:17:21,040 INFO L87 Difference]: Start difference. First operand 1604 states and 3021 transitions. Second operand 6 states. [2018-10-24 21:17:35,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 21:17:35,630 INFO L93 Difference]: Finished difference Result 6330 states and 12128 transitions. [2018-10-24 21:17:35,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 21:17:35,641 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 132 [2018-10-24 21:17:35,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 21:17:35,678 INFO L225 Difference]: With dead ends: 6330 [2018-10-24 21:17:35,679 INFO L226 Difference]: Without dead ends: 4732 [2018-10-24 21:17:35,689 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-24 21:17:35,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4732 states. [2018-10-24 21:17:35,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4732 to 4700. [2018-10-24 21:17:35,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4700 states. [2018-10-24 21:17:35,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4700 states to 4700 states and 7674 transitions. [2018-10-24 21:17:35,861 INFO L78 Accepts]: Start accepts. Automaton has 4700 states and 7674 transitions. Word has length 132 [2018-10-24 21:17:35,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 21:17:35,862 INFO L481 AbstractCegarLoop]: Abstraction has 4700 states and 7674 transitions. [2018-10-24 21:17:35,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 21:17:35,862 INFO L276 IsEmpty]: Start isEmpty. Operand 4700 states and 7674 transitions. [2018-10-24 21:17:35,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-24 21:17:35,873 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 21:17:35,873 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] [2018-10-24 21:17:35,873 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 21:17:35,874 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 21:17:35,874 INFO L82 PathProgramCache]: Analyzing trace with hash 2020767262, now seen corresponding path program 1 times [2018-10-24 21:17:35,874 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 21:17:35,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 21:17:35,878 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 21:17:35,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 21:17:35,879 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 21:17:35,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 21:17:36,300 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 21:17:36,301 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 21:17:36,301 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 21:17:36,301 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 21:17:36,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 21:17:36,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 21:17:36,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-24 21:17:36,303 INFO L87 Difference]: Start difference. First operand 4700 states and 7674 transitions. Second operand 5 states. [2018-10-24 21:17:45,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 21:17:45,315 INFO L93 Difference]: Finished difference Result 14300 states and 23670 transitions. [2018-10-24 21:17:45,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 21:17:45,318 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 134 [2018-10-24 21:17:45,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 21:17:45,366 INFO L225 Difference]: With dead ends: 14300 [2018-10-24 21:17:45,366 INFO L226 Difference]: Without dead ends: 9606 [2018-10-24 21:17:45,380 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 21:17:45,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9606 states. [2018-10-24 21:17:45,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9606 to 9524. [2018-10-24 21:17:45,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9524 states. [2018-10-24 21:17:45,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9524 states to 9524 states and 14353 transitions. [2018-10-24 21:17:45,643 INFO L78 Accepts]: Start accepts. Automaton has 9524 states and 14353 transitions. Word has length 134 [2018-10-24 21:17:45,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 21:17:45,644 INFO L481 AbstractCegarLoop]: Abstraction has 9524 states and 14353 transitions. [2018-10-24 21:17:45,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 21:17:45,644 INFO L276 IsEmpty]: Start isEmpty. Operand 9524 states and 14353 transitions. [2018-10-24 21:17:45,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-10-24 21:17:45,647 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 21:17:45,648 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 21:17:45,648 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 21:17:45,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 21:17:45,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1670146821, now seen corresponding path program 1 times [2018-10-24 21:17:45,648 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 21:17:45,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 21:17:45,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 21:17:45,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 21:17:45,650 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 21:17:45,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 21:17:46,161 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 21:17:46,161 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 21:17:46,162 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 21:17:46,162 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 21:17:46,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 21:17:46,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 21:17:46,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-24 21:17:46,163 INFO L87 Difference]: Start difference. First operand 9524 states and 14353 transitions. Second operand 6 states. [2018-10-24 21:18:04,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 21:18:04,917 INFO L93 Difference]: Finished difference Result 38078 states and 61054 transitions. [2018-10-24 21:18:04,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 21:18:04,922 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 145 [2018-10-24 21:18:04,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 21:18:05,067 INFO L225 Difference]: With dead ends: 38078 [2018-10-24 21:18:05,069 INFO L226 Difference]: Without dead ends: 28560 [2018-10-24 21:18:05,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-24 21:18:05,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28560 states. [2018-10-24 21:18:05,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28560 to 28506. [2018-10-24 21:18:05,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28506 states. [2018-10-24 21:18:05,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28506 states to 28506 states and 41702 transitions. [2018-10-24 21:18:05,894 INFO L78 Accepts]: Start accepts. Automaton has 28506 states and 41702 transitions. Word has length 145 [2018-10-24 21:18:05,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 21:18:05,894 INFO L481 AbstractCegarLoop]: Abstraction has 28506 states and 41702 transitions. [2018-10-24 21:18:05,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 21:18:05,896 INFO L276 IsEmpty]: Start isEmpty. Operand 28506 states and 41702 transitions. [2018-10-24 21:18:05,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-10-24 21:18:05,899 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 21:18:05,900 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, 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] [2018-10-24 21:18:05,900 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 21:18:05,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 21:18:05,901 INFO L82 PathProgramCache]: Analyzing trace with hash 160089495, now seen corresponding path program 1 times [2018-10-24 21:18:05,901 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 21:18:05,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 21:18:05,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 21:18:05,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 21:18:05,902 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 21:18:05,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 21:18:06,229 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 21:18:06,632 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 21:18:06,633 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 21:18:06,633 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 21:18:06,633 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 21:18:06,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 21:18:06,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 21:18:06,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 21:18:06,637 INFO L87 Difference]: Start difference. First operand 28506 states and 41702 transitions. Second operand 6 states. [2018-10-24 21:18:18,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 21:18:18,411 INFO L93 Difference]: Finished difference Result 76173 states and 117835 transitions. [2018-10-24 21:18:18,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 21:18:18,414 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 179 [2018-10-24 21:18:18,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 21:18:18,639 INFO L225 Difference]: With dead ends: 76173 [2018-10-24 21:18:18,639 INFO L226 Difference]: Without dead ends: 47673 [2018-10-24 21:18:18,742 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-24 21:18:18,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47673 states. [2018-10-24 21:18:19,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47673 to 47513. [2018-10-24 21:18:19,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47513 states. [2018-10-24 21:18:20,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47513 states to 47513 states and 66846 transitions. [2018-10-24 21:18:20,126 INFO L78 Accepts]: Start accepts. Automaton has 47513 states and 66846 transitions. Word has length 179 [2018-10-24 21:18:20,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 21:18:20,126 INFO L481 AbstractCegarLoop]: Abstraction has 47513 states and 66846 transitions. [2018-10-24 21:18:20,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 21:18:20,127 INFO L276 IsEmpty]: Start isEmpty. Operand 47513 states and 66846 transitions. [2018-10-24 21:18:20,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-10-24 21:18:20,139 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 21:18:20,139 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, 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] [2018-10-24 21:18:20,139 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 21:18:20,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 21:18:20,140 INFO L82 PathProgramCache]: Analyzing trace with hash -957966671, now seen corresponding path program 1 times [2018-10-24 21:18:20,140 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 21:18:20,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 21:18:20,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 21:18:20,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 21:18:20,141 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 21:18:20,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 21:18:20,414 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 21:18:20,481 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 94 proven. 75 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-24 21:18:20,481 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 21:18:20,482 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 21:18:20,482 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 244 with the following transitions: [2018-10-24 21:18:20,485 INFO L202 CegarAbsIntRunner]: [0], [1], [1868], [1875], [1883], [1891], [1899], [1907], [1915], [1923], [1931], [1939], [1947], [1955], [1963], [1971], [1979], [1987], [1995], [2003], [2011], [2019], [2027], [2035], [2043], [2051], [2059], [2067], [2075], [2083], [2091], [2099], [2107], [2115], [2123], [2131], [2139], [2147], [2155], [2163], [2171], [2179], [2187], [2195], [2199], [2201], [2204], [2212], [2220], [2228], [2236], [2244], [2252], [2260], [2268], [2276], [2284], [2292], [2300], [2308], [2316], [2324], [2332], [2340], [2348], [2356], [2361], [2365], [2369], [2373], [2377], [2381], [2385], [2389], [2393], [2397], [2400], [2401], [2405], [2409], [2413], [2417], [2421], [2425], [2429], [2433], [2437], [2441], [2445], [2449], [2453], [2457], [2461], [2465], [2469], [2473], [2477], [2481], [2485], [2489], [2493], [2497], [2501], [2505], [2509], [2513], [2516], [3240], [3244], [3248], [3254], [3258], [3260], [3271], [3272], [3273], [3275], [3276] [2018-10-24 21:18:20,597 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 21:18:20,597 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 21:18:24,505 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-24 21:18:24,961 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 21:18:24,963 INFO L272 AbstractInterpreter]: Visited 114 different actions 114 times. Never merged. Never widened. Never found a fixpoint. Largest state had 26 variables. [2018-10-24 21:18:24,985 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 21:18:24,986 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-24 21:18:27,739 INFO L232 lantSequenceWeakener]: Weakened 235 states. On average, predicates are now at 75.67% of their original sizes. [2018-10-24 21:18:27,740 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-24 21:18:28,318 INFO L413 sIntCurrentIteration]: We have 242 unified AI predicates [2018-10-24 21:18:28,318 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-24 21:18:28,319 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 21:18:28,319 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 12 [2018-10-24 21:18:28,319 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 21:18:28,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 21:18:28,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 21:18:28,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-24 21:18:28,321 INFO L87 Difference]: Start difference. First operand 47513 states and 66846 transitions. Second operand 8 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown