java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-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/Problem11_label00_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 06:03:23,888 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 06:03:23,891 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 06:03:23,907 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 06:03:23,907 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 06:03:23,908 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 06:03:23,910 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 06:03:23,912 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 06:03:23,914 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 06:03:23,914 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 06:03:23,915 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 06:03:23,916 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 06:03:23,917 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 06:03:23,918 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 06:03:23,919 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 06:03:23,920 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 06:03:23,922 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 06:03:23,924 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 06:03:23,926 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 06:03:23,933 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 06:03:23,934 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 06:03:23,939 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 06:03:23,946 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-11-07 06:03:23,956 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-11-07 06:03:23,971 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 06:03:23,971 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 06:03:23,972 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 06:03:23,972 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 06:03:23,972 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 06:03:23,973 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 06:03:23,973 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-07 06:03:23,973 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 06:03:23,973 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 06:03:23,973 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 06:03:23,973 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 06:03:23,974 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 06:03:23,974 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 06:03:23,974 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-07 06:03:23,975 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 06:03:23,975 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 06:03:23,975 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 06:03:23,975 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 06:03:23,976 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 06:03:23,976 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 06:03:23,976 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 06:03:23,976 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 06:03:23,976 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 06:03:23,977 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 06:03:23,977 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 06:03:23,977 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 06:03:23,977 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 06:03:23,977 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 06:03:23,977 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 06:03:23,978 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 06:03:23,978 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 06:03:23,978 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 06:03:23,978 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 06:03:23,978 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 06:03:23,979 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 06:03:23,979 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 06:03:24,026 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 06:03:24,047 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 06:03:24,051 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 06:03:24,053 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 06:03:24,053 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 06:03:24,054 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label00_false-unreach-call.c [2018-11-07 06:03:24,133 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/117942cae/9cf5f9331ecc4bdfb5f6f5a0d3bfcb11/FLAGd48774f24 [2018-11-07 06:03:24,809 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 06:03:24,810 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label00_false-unreach-call.c [2018-11-07 06:03:24,836 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/117942cae/9cf5f9331ecc4bdfb5f6f5a0d3bfcb11/FLAGd48774f24 [2018-11-07 06:03:24,856 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/117942cae/9cf5f9331ecc4bdfb5f6f5a0d3bfcb11 [2018-11-07 06:03:24,870 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 06:03:24,872 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 06:03:24,874 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 06:03:24,874 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 06:03:24,880 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 06:03:24,881 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:03:24" (1/1) ... [2018-11-07 06:03:24,885 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@567b4d96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:03:24, skipping insertion in model container [2018-11-07 06:03:24,886 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:03:24" (1/1) ... [2018-11-07 06:03:24,897 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 06:03:24,979 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 06:03:25,556 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 06:03:25,561 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 06:03:25,753 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 06:03:25,775 INFO L193 MainTranslator]: Completed translation [2018-11-07 06:03:25,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:03:25 WrapperNode [2018-11-07 06:03:25,776 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 06:03:25,777 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 06:03:25,777 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 06:03:25,777 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 06:03:25,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:03:25" (1/1) ... [2018-11-07 06:03:25,931 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:03:25" (1/1) ... [2018-11-07 06:03:25,948 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 06:03:25,948 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 06:03:25,948 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 06:03:25,948 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 06:03:25,967 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:03:25" (1/1) ... [2018-11-07 06:03:25,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:03:25" (1/1) ... [2018-11-07 06:03:25,983 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:03:25" (1/1) ... [2018-11-07 06:03:25,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:03:25" (1/1) ... [2018-11-07 06:03:26,054 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:03:25" (1/1) ... [2018-11-07 06:03:26,064 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:03:25" (1/1) ... [2018-11-07 06:03:26,076 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:03:25" (1/1) ... [2018-11-07 06:03:26,090 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 06:03:26,091 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 06:03:26,091 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 06:03:26,091 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 06:03:26,092 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:03:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-07 06:03:26,164 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 06:03:26,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 06:03:26,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 06:03:26,166 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 06:03:26,166 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 06:03:26,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 06:03:26,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 06:03:26,167 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 06:03:26,167 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 06:03:30,263 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 06:03:30,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:03:30 BoogieIcfgContainer [2018-11-07 06:03:30,264 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 06:03:30,265 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 06:03:30,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 06:03:30,268 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 06:03:30,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:03:24" (1/3) ... [2018-11-07 06:03:30,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fdd996b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:03:30, skipping insertion in model container [2018-11-07 06:03:30,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:03:25" (2/3) ... [2018-11-07 06:03:30,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fdd996b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:03:30, skipping insertion in model container [2018-11-07 06:03:30,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:03:30" (3/3) ... [2018-11-07 06:03:30,272 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label00_false-unreach-call.c [2018-11-07 06:03:30,283 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 06:03:30,295 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 06:03:30,318 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 06:03:30,370 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 06:03:30,370 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 06:03:30,370 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 06:03:30,370 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 06:03:30,371 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 06:03:30,371 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 06:03:30,371 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 06:03:30,371 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 06:03:30,420 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states. [2018-11-07 06:03:30,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-07 06:03:30,427 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:03:30,430 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 06:03:30,434 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:03:30,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:03:30,441 INFO L82 PathProgramCache]: Analyzing trace with hash 321624169, now seen corresponding path program 1 times [2018-11-07 06:03:30,444 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:03:30,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:03:30,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:03:30,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:03:30,506 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:03:30,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:03:30,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 06:03:30,712 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 06:03:30,712 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 06:03:30,713 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 06:03:30,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 06:03:30,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 06:03:30,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 06:03:30,740 INFO L87 Difference]: Start difference. First operand 293 states. Second operand 3 states. [2018-11-07 06:03:33,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:03:33,413 INFO L93 Difference]: Finished difference Result 783 states and 1371 transitions. [2018-11-07 06:03:33,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 06:03:33,417 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2018-11-07 06:03:33,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:03:33,436 INFO L225 Difference]: With dead ends: 783 [2018-11-07 06:03:33,436 INFO L226 Difference]: Without dead ends: 488 [2018-11-07 06:03:33,445 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 06:03:33,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2018-11-07 06:03:33,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 488. [2018-11-07 06:03:33,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 488 states. [2018-11-07 06:03:33,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 737 transitions. [2018-11-07 06:03:33,534 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 737 transitions. Word has length 13 [2018-11-07 06:03:33,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:03:33,534 INFO L480 AbstractCegarLoop]: Abstraction has 488 states and 737 transitions. [2018-11-07 06:03:33,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 06:03:33,535 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 737 transitions. [2018-11-07 06:03:33,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-11-07 06:03:33,539 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:03:33,540 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-07 06:03:33,540 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:03:33,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:03:33,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1144152091, now seen corresponding path program 1 times [2018-11-07 06:03:33,541 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:03:33,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:03:33,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:03:33,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:03:33,543 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:03:33,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:03:33,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 06:03:33,973 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 06:03:33,974 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 06:03:33,974 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 06:03:33,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 06:03:33,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 06:03:33,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 06:03:33,977 INFO L87 Difference]: Start difference. First operand 488 states and 737 transitions. Second operand 6 states. [2018-11-07 06:03:38,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:03:38,900 INFO L93 Difference]: Finished difference Result 1564 states and 2506 transitions. [2018-11-07 06:03:38,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 06:03:38,903 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 86 [2018-11-07 06:03:38,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:03:38,912 INFO L225 Difference]: With dead ends: 1564 [2018-11-07 06:03:38,912 INFO L226 Difference]: Without dead ends: 1082 [2018-11-07 06:03:38,915 INFO L604 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 [2018-11-07 06:03:38,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2018-11-07 06:03:38,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1070. [2018-11-07 06:03:38,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1070 states. [2018-11-07 06:03:38,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1603 transitions. [2018-11-07 06:03:38,982 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1603 transitions. Word has length 86 [2018-11-07 06:03:38,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:03:38,983 INFO L480 AbstractCegarLoop]: Abstraction has 1070 states and 1603 transitions. [2018-11-07 06:03:38,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 06:03:38,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1603 transitions. [2018-11-07 06:03:38,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-11-07 06:03:38,987 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:03:38,987 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-07 06:03:38,990 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:03:38,990 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:03:38,990 INFO L82 PathProgramCache]: Analyzing trace with hash 919002884, now seen corresponding path program 1 times [2018-11-07 06:03:38,990 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:03:38,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:03:38,991 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:03:38,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:03:38,992 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:03:39,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:03:39,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 06:03:39,152 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 06:03:39,152 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 06:03:39,152 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 06:03:39,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 06:03:39,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 06:03:39,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 06:03:39,153 INFO L87 Difference]: Start difference. First operand 1070 states and 1603 transitions. Second operand 3 states. [2018-11-07 06:03:41,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:03:41,425 INFO L93 Difference]: Finished difference Result 2535 states and 3860 transitions. [2018-11-07 06:03:41,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 06:03:41,433 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2018-11-07 06:03:41,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:03:41,446 INFO L225 Difference]: With dead ends: 2535 [2018-11-07 06:03:41,447 INFO L226 Difference]: Without dead ends: 1471 [2018-11-07 06:03:41,451 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 06:03:41,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1471 states. [2018-11-07 06:03:41,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1471 to 1461. [2018-11-07 06:03:41,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1461 states. [2018-11-07 06:03:41,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 2109 transitions. [2018-11-07 06:03:41,512 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 2109 transitions. Word has length 87 [2018-11-07 06:03:41,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:03:41,513 INFO L480 AbstractCegarLoop]: Abstraction has 1461 states and 2109 transitions. [2018-11-07 06:03:41,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 06:03:41,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 2109 transitions. [2018-11-07 06:03:41,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-11-07 06:03:41,519 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:03:41,519 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-07 06:03:41,519 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:03:41,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:03:41,520 INFO L82 PathProgramCache]: Analyzing trace with hash -363526081, now seen corresponding path program 1 times [2018-11-07 06:03:41,520 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:03:41,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:03:41,521 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:03:41,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:03:41,522 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:03:41,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:03:41,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 06:03:41,696 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 06:03:41,696 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 06:03:41,696 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 06:03:41,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 06:03:41,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 06:03:41,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 06:03:41,699 INFO L87 Difference]: Start difference. First operand 1461 states and 2109 transitions. Second operand 3 states. [2018-11-07 06:03:44,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:03:44,133 INFO L93 Difference]: Finished difference Result 3308 states and 4868 transitions. [2018-11-07 06:03:44,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 06:03:44,134 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 88 [2018-11-07 06:03:44,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:03:44,149 INFO L225 Difference]: With dead ends: 3308 [2018-11-07 06:03:44,149 INFO L226 Difference]: Without dead ends: 1853 [2018-11-07 06:03:44,156 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 06:03:44,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1853 states. [2018-11-07 06:03:44,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1853 to 1847. [2018-11-07 06:03:44,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1847 states. [2018-11-07 06:03:44,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1847 states to 1847 states and 2612 transitions. [2018-11-07 06:03:44,210 INFO L78 Accepts]: Start accepts. Automaton has 1847 states and 2612 transitions. Word has length 88 [2018-11-07 06:03:44,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:03:44,210 INFO L480 AbstractCegarLoop]: Abstraction has 1847 states and 2612 transitions. [2018-11-07 06:03:44,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 06:03:44,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1847 states and 2612 transitions. [2018-11-07 06:03:44,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-11-07 06:03:44,216 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:03:44,216 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-07 06:03:44,216 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:03:44,216 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:03:44,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1267945301, now seen corresponding path program 1 times [2018-11-07 06:03:44,217 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:03:44,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:03:44,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:03:44,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:03:44,218 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:03:44,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:03:44,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 06:03:44,684 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 06:03:44,684 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 06:03:44,685 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 06:03:44,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 06:03:44,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 06:03:44,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-11-07 06:03:44,686 INFO L87 Difference]: Start difference. First operand 1847 states and 2612 transitions. Second operand 6 states. [2018-11-07 06:03:48,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:03:48,953 INFO L93 Difference]: Finished difference Result 6011 states and 8868 transitions. [2018-11-07 06:03:48,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 06:03:48,955 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2018-11-07 06:03:48,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:03:48,979 INFO L225 Difference]: With dead ends: 6011 [2018-11-07 06:03:48,979 INFO L226 Difference]: Without dead ends: 4170 [2018-11-07 06:03:48,991 INFO L604 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 [2018-11-07 06:03:48,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2018-11-07 06:03:49,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 4105. [2018-11-07 06:03:49,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4105 states. [2018-11-07 06:03:49,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4105 states to 4105 states and 5484 transitions. [2018-11-07 06:03:49,125 INFO L78 Accepts]: Start accepts. Automaton has 4105 states and 5484 transitions. Word has length 94 [2018-11-07 06:03:49,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:03:49,126 INFO L480 AbstractCegarLoop]: Abstraction has 4105 states and 5484 transitions. [2018-11-07 06:03:49,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 06:03:49,126 INFO L276 IsEmpty]: Start isEmpty. Operand 4105 states and 5484 transitions. [2018-11-07 06:03:49,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-11-07 06:03:49,133 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:03:49,133 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 06:03:49,133 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:03:49,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:03:49,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1445719641, now seen corresponding path program 1 times [2018-11-07 06:03:49,134 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:03:49,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:03:49,135 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:03:49,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:03:49,136 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:03:49,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:03:49,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 06:03:49,495 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 06:03:49,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-07 06:03:49,495 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 06:03:49,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 06:03:49,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 06:03:49,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-07 06:03:49,496 INFO L87 Difference]: Start difference. First operand 4105 states and 5484 transitions. Second operand 7 states. [2018-11-07 06:03:53,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:03:53,058 INFO L93 Difference]: Finished difference Result 9559 states and 13437 transitions. [2018-11-07 06:03:53,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-07 06:03:53,064 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 108 [2018-11-07 06:03:53,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:03:53,095 INFO L225 Difference]: With dead ends: 9559 [2018-11-07 06:03:53,095 INFO L226 Difference]: Without dead ends: 5265 [2018-11-07 06:03:53,119 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-11-07 06:03:53,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5265 states. [2018-11-07 06:03:53,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5265 to 4937. [2018-11-07 06:03:53,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4937 states. [2018-11-07 06:03:53,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4937 states to 4937 states and 6610 transitions. [2018-11-07 06:03:53,259 INFO L78 Accepts]: Start accepts. Automaton has 4937 states and 6610 transitions. Word has length 108 [2018-11-07 06:03:53,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:03:53,260 INFO L480 AbstractCegarLoop]: Abstraction has 4937 states and 6610 transitions. [2018-11-07 06:03:53,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 06:03:53,260 INFO L276 IsEmpty]: Start isEmpty. Operand 4937 states and 6610 transitions. [2018-11-07 06:03:53,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-11-07 06:03:53,262 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:03:53,262 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 06:03:53,263 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:03:53,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:03:53,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1076492435, now seen corresponding path program 1 times [2018-11-07 06:03:53,263 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:03:53,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:03:53,264 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:03:53,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:03:53,264 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:03:53,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:03:53,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 06:03:53,527 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:03:53,527 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 06:03:53,528 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 146 with the following transitions: [2018-11-07 06:03:53,530 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 06:03:53,598 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 06:03:53,599 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 06:03:54,775 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 06:03:54,777 INFO L272 AbstractInterpreter]: Visited 140 different actions 406 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-07 06:03:54,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:03:54,824 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 06:03:54,824 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:03:54,824 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-07 06:03:54,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:03:54,840 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 06:03:54,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:03:54,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 06:03:55,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 06:03:55,064 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 06:03:55,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 06:03:55,252 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 06:03:55,253 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 10 [2018-11-07 06:03:55,253 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 06:03:55,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 06:03:55,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 06:03:55,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-11-07 06:03:55,254 INFO L87 Difference]: Start difference. First operand 4937 states and 6610 transitions. Second operand 3 states. [2018-11-07 06:03:57,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:03:57,450 INFO L93 Difference]: Finished difference Result 10825 states and 14893 transitions. [2018-11-07 06:03:57,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 06:03:57,450 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 145 [2018-11-07 06:03:57,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:03:57,476 INFO L225 Difference]: With dead ends: 10825 [2018-11-07 06:03:57,476 INFO L226 Difference]: Without dead ends: 5894 [2018-11-07 06:03:57,503 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-11-07 06:03:57,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5894 states. [2018-11-07 06:03:57,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5894 to 5681. [2018-11-07 06:03:57,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5681 states. [2018-11-07 06:03:57,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5681 states to 5681 states and 7506 transitions. [2018-11-07 06:03:57,633 INFO L78 Accepts]: Start accepts. Automaton has 5681 states and 7506 transitions. Word has length 145 [2018-11-07 06:03:57,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:03:57,634 INFO L480 AbstractCegarLoop]: Abstraction has 5681 states and 7506 transitions. [2018-11-07 06:03:57,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 06:03:57,634 INFO L276 IsEmpty]: Start isEmpty. Operand 5681 states and 7506 transitions. [2018-11-07 06:03:57,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2018-11-07 06:03:57,638 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:03:57,638 INFO L375 BasicCegarLoop]: trace histogram [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, 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] [2018-11-07 06:03:57,639 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:03:57,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:03:57,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1768948367, now seen corresponding path program 1 times [2018-11-07 06:03:57,639 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:03:57,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:03:57,640 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:03:57,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:03:57,640 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:03:57,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:03:58,126 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-07 06:03:58,714 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-11-07 06:03:58,989 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 16 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 06:03:58,990 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:03:58,990 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 06:03:58,990 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 226 with the following transitions: [2018-11-07 06:03:58,990 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [594], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 06:03:58,998 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 06:03:58,999 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 06:04:00,062 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 06:04:00,063 INFO L272 AbstractInterpreter]: Visited 126 different actions 375 times. Merged at 7 different actions 21 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-07 06:04:00,100 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:04:00,100 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 06:04:00,100 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:04:00,100 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-07 06:04:00,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:04:00,118 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 06:04:00,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:04:00,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 06:04:03,209 WARN L179 SmtUtils]: Spent 2.29 s on a formula simplification. DAG size of input: 152 DAG size of output: 28 [2018-11-07 06:04:03,594 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 13 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 06:04:03,595 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 06:04:03,964 WARN L179 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2018-11-07 06:04:05,327 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 13 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 06:04:05,348 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 06:04:05,348 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2018-11-07 06:04:05,348 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 06:04:05,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-07 06:04:05,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-07 06:04:05,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2018-11-07 06:04:05,350 INFO L87 Difference]: Start difference. First operand 5681 states and 7506 transitions. Second operand 16 states. [2018-11-07 06:04:07,563 WARN L179 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2018-11-07 06:04:08,392 WARN L179 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 19 [2018-11-07 06:04:13,827 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 22 [2018-11-07 06:04:14,679 WARN L179 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 29 [2018-11-07 06:04:31,331 WARN L179 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2018-11-07 06:04:37,520 WARN L179 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 20 [2018-11-07 06:04:38,015 WARN L179 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2018-11-07 06:04:53,156 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2018-11-07 06:05:00,826 WARN L179 SmtUtils]: Spent 1.93 s on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2018-11-07 06:05:03,082 WARN L179 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2018-11-07 06:05:06,258 WARN L179 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2018-11-07 06:06:09,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:06:09,840 INFO L93 Difference]: Finished difference Result 27011 states and 44165 transitions. [2018-11-07 06:06:09,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-11-07 06:06:09,841 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 225 [2018-11-07 06:06:09,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:06:09,966 INFO L225 Difference]: With dead ends: 27011 [2018-11-07 06:06:09,966 INFO L226 Difference]: Without dead ends: 20791 [2018-11-07 06:06:10,021 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 441 SyntacticMatches, 3 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6027 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=2277, Invalid=14235, Unknown=0, NotChecked=0, Total=16512 [2018-11-07 06:06:10,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20791 states. [2018-11-07 06:06:10,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20791 to 18617. [2018-11-07 06:06:10,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18617 states. [2018-11-07 06:06:10,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18617 states to 18617 states and 23389 transitions. [2018-11-07 06:06:10,704 INFO L78 Accepts]: Start accepts. Automaton has 18617 states and 23389 transitions. Word has length 225 [2018-11-07 06:06:10,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:06:10,705 INFO L480 AbstractCegarLoop]: Abstraction has 18617 states and 23389 transitions. [2018-11-07 06:06:10,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-07 06:06:10,705 INFO L276 IsEmpty]: Start isEmpty. Operand 18617 states and 23389 transitions. [2018-11-07 06:06:10,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-11-07 06:06:10,711 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:06:10,711 INFO L375 BasicCegarLoop]: trace histogram [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, 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] [2018-11-07 06:06:10,712 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:06:10,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:06:10,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1941363547, now seen corresponding path program 1 times [2018-11-07 06:06:10,712 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:06:10,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:06:10,713 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:06:10,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:06:10,713 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:06:10,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:06:11,178 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-07 06:06:11,778 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-11-07 06:06:12,087 WARN L179 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-11-07 06:06:12,211 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 16 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 06:06:12,211 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:06:12,211 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 06:06:12,212 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 236 with the following transitions: [2018-11-07 06:06:12,212 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [594], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 06:06:12,217 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 06:06:12,217 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 06:06:12,905 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 06:06:12,905 INFO L272 AbstractInterpreter]: Visited 136 different actions 402 times. Merged at 7 different actions 18 times. Never widened. Found 3 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-07 06:06:12,942 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:06:12,942 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 06:06:12,942 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:06:12,942 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-07 06:06:12,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:06:12,956 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 06:06:13,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:06:13,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 06:06:13,740 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 13 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 06:06:13,741 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 06:06:14,958 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 13 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 06:06:14,978 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 06:06:14,979 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2018-11-07 06:06:14,979 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 06:06:14,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-07 06:06:14,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-07 06:06:14,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2018-11-07 06:06:14,980 INFO L87 Difference]: Start difference. First operand 18617 states and 23389 transitions. Second operand 16 states. [2018-11-07 06:06:16,386 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2018-11-07 06:06:19,073 WARN L179 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2018-11-07 06:06:20,554 WARN L179 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2018-11-07 06:06:21,103 WARN L179 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2018-11-07 06:06:24,950 WARN L179 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2018-11-07 06:06:26,540 WARN L179 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2018-11-07 06:06:30,345 WARN L179 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2018-11-07 06:06:38,677 WARN L179 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2018-11-07 06:06:47,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:06:47,667 INFO L93 Difference]: Finished difference Result 44055 states and 62126 transitions. [2018-11-07 06:06:47,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-11-07 06:06:47,668 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 235 [2018-11-07 06:06:47,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:06:47,834 INFO L225 Difference]: With dead ends: 44055 [2018-11-07 06:06:47,834 INFO L226 Difference]: Without dead ends: 25824 [2018-11-07 06:06:47,932 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 590 GetRequests, 461 SyntacticMatches, 2 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6191 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=2373, Invalid=14139, Unknown=0, NotChecked=0, Total=16512 [2018-11-07 06:06:47,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25824 states. [2018-11-07 06:06:48,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25824 to 23776. [2018-11-07 06:06:48,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23776 states. [2018-11-07 06:06:48,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23776 states to 23776 states and 29549 transitions. [2018-11-07 06:06:48,603 INFO L78 Accepts]: Start accepts. Automaton has 23776 states and 29549 transitions. Word has length 235 [2018-11-07 06:06:48,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:06:48,604 INFO L480 AbstractCegarLoop]: Abstraction has 23776 states and 29549 transitions. [2018-11-07 06:06:48,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-07 06:06:48,604 INFO L276 IsEmpty]: Start isEmpty. Operand 23776 states and 29549 transitions. [2018-11-07 06:06:48,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-11-07 06:06:48,611 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:06:48,611 INFO L375 BasicCegarLoop]: trace histogram [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, 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] [2018-11-07 06:06:48,611 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:06:48,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:06:48,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1737385000, now seen corresponding path program 1 times [2018-11-07 06:06:48,612 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:06:48,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:06:48,613 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:06:48,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:06:48,613 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:06:48,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:06:49,217 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2018-11-07 06:06:49,217 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:06:49,217 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 06:06:49,217 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 236 with the following transitions: [2018-11-07 06:06:49,217 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [574], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 06:06:49,222 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 06:06:49,222 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 06:06:49,882 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 06:06:49,882 INFO L272 AbstractInterpreter]: Visited 141 different actions 558 times. Merged at 7 different actions 28 times. Never widened. Found 4 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-07 06:06:49,916 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:06:49,917 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 06:06:49,917 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:06:49,917 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-07 06:06:49,929 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:06:49,929 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 06:06:50,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:06:50,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 06:06:50,247 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 100 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 06:06:50,247 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 06:06:50,350 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 100 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 06:06:50,370 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 06:06:50,371 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 13 [2018-11-07 06:06:50,371 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 06:06:50,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-07 06:06:50,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-07 06:06:50,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-11-07 06:06:50,372 INFO L87 Difference]: Start difference. First operand 23776 states and 29549 transitions. Second operand 11 states. [2018-11-07 06:06:55,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:06:55,236 INFO L93 Difference]: Finished difference Result 58143 states and 76526 transitions. [2018-11-07 06:06:55,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-07 06:06:55,236 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 235 [2018-11-07 06:06:55,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:06:55,351 INFO L225 Difference]: With dead ends: 58143 [2018-11-07 06:06:55,351 INFO L226 Difference]: Without dead ends: 34753 [2018-11-07 06:06:55,435 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 472 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2018-11-07 06:06:55,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34753 states. [2018-11-07 06:06:56,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34753 to 30728. [2018-11-07 06:06:56,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30728 states. [2018-11-07 06:06:56,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30728 states to 30728 states and 38572 transitions. [2018-11-07 06:06:56,265 INFO L78 Accepts]: Start accepts. Automaton has 30728 states and 38572 transitions. Word has length 235 [2018-11-07 06:06:56,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:06:56,266 INFO L480 AbstractCegarLoop]: Abstraction has 30728 states and 38572 transitions. [2018-11-07 06:06:56,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-07 06:06:56,266 INFO L276 IsEmpty]: Start isEmpty. Operand 30728 states and 38572 transitions. [2018-11-07 06:06:56,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-11-07 06:06:56,271 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:06:56,272 INFO L375 BasicCegarLoop]: trace histogram [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, 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] [2018-11-07 06:06:56,272 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:06:56,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:06:56,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1051698572, now seen corresponding path program 1 times [2018-11-07 06:06:56,272 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:06:56,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:06:56,273 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:06:56,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:06:56,273 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:06:56,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:06:56,918 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 91 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 06:06:56,918 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:06:56,918 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 06:06:56,918 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 238 with the following transitions: [2018-11-07 06:06:56,919 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [582], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 06:06:56,924 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 06:06:56,924 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 06:06:57,394 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 06:06:57,394 INFO L272 AbstractInterpreter]: Visited 141 different actions 554 times. Merged at 7 different actions 24 times. Never widened. Found 4 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-07 06:06:57,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:06:57,436 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 06:06:57,436 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:06:57,436 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-07 06:06:57,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:06:57,456 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 06:06:57,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:06:57,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 06:06:57,983 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 89 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 06:06:57,984 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 06:06:58,536 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 91 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 06:06:58,557 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 06:06:58,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 9] total 21 [2018-11-07 06:06:58,557 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 06:06:58,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-07 06:06:58,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-07 06:06:58,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2018-11-07 06:06:58,558 INFO L87 Difference]: Start difference. First operand 30728 states and 38572 transitions. Second operand 15 states. [2018-11-07 06:07:08,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:07:08,145 INFO L93 Difference]: Finished difference Result 65666 states and 86463 transitions. [2018-11-07 06:07:08,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-07 06:07:08,146 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 237 [2018-11-07 06:07:08,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:07:08,287 INFO L225 Difference]: With dead ends: 65666 [2018-11-07 06:07:08,287 INFO L226 Difference]: Without dead ends: 35324 [2018-11-07 06:07:08,376 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 469 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=548, Invalid=1432, Unknown=0, NotChecked=0, Total=1980 [2018-11-07 06:07:08,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35324 states. [2018-11-07 06:07:09,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35324 to 33216. [2018-11-07 06:07:09,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33216 states. [2018-11-07 06:07:09,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33216 states to 33216 states and 41137 transitions. [2018-11-07 06:07:09,394 INFO L78 Accepts]: Start accepts. Automaton has 33216 states and 41137 transitions. Word has length 237 [2018-11-07 06:07:09,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:07:09,394 INFO L480 AbstractCegarLoop]: Abstraction has 33216 states and 41137 transitions. [2018-11-07 06:07:09,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-07 06:07:09,395 INFO L276 IsEmpty]: Start isEmpty. Operand 33216 states and 41137 transitions. [2018-11-07 06:07:09,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2018-11-07 06:07:09,400 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:07:09,400 INFO L375 BasicCegarLoop]: trace histogram [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, 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] [2018-11-07 06:07:09,400 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:07:09,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:07:09,401 INFO L82 PathProgramCache]: Analyzing trace with hash -6626781, now seen corresponding path program 1 times [2018-11-07 06:07:09,401 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:07:09,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:07:09,402 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:07:09,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:07:09,402 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:07:09,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:07:10,333 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 19 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 06:07:10,333 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:07:10,334 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 06:07:10,334 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 241 with the following transitions: [2018-11-07 06:07:10,334 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [594], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 06:07:10,337 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 06:07:10,337 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 06:07:10,744 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 06:07:10,744 INFO L272 AbstractInterpreter]: Visited 141 different actions 418 times. Merged at 7 different actions 18 times. Never widened. Found 3 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-07 06:07:10,770 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:07:10,771 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 06:07:10,771 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:07:10,771 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 06:07:10,785 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:07:10,786 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 06:07:10,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:07:10,858 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 06:07:11,020 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 105 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 06:07:11,021 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 06:07:11,609 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 13 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 06:07:11,630 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 06:07:11,630 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 21 [2018-11-07 06:07:11,630 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 06:07:11,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-07 06:07:11,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-07 06:07:11,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2018-11-07 06:07:11,632 INFO L87 Difference]: Start difference. First operand 33216 states and 41137 transitions. Second operand 16 states. [2018-11-07 06:07:22,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:07:22,412 INFO L93 Difference]: Finished difference Result 81039 states and 113495 transitions. [2018-11-07 06:07:22,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-11-07 06:07:22,412 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 240 [2018-11-07 06:07:22,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:07:22,751 INFO L225 Difference]: With dead ends: 81039 [2018-11-07 06:07:22,751 INFO L226 Difference]: Without dead ends: 47477 [2018-11-07 06:07:22,922 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 471 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=832, Invalid=2950, Unknown=0, NotChecked=0, Total=3782 [2018-11-07 06:07:22,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47477 states. [2018-11-07 06:07:24,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47477 to 43314. [2018-11-07 06:07:24,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43314 states. [2018-11-07 06:07:24,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43314 states to 43314 states and 54518 transitions. [2018-11-07 06:07:24,720 INFO L78 Accepts]: Start accepts. Automaton has 43314 states and 54518 transitions. Word has length 240 [2018-11-07 06:07:24,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:07:24,720 INFO L480 AbstractCegarLoop]: Abstraction has 43314 states and 54518 transitions. [2018-11-07 06:07:24,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-07 06:07:24,720 INFO L276 IsEmpty]: Start isEmpty. Operand 43314 states and 54518 transitions. [2018-11-07 06:07:24,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-11-07 06:07:24,736 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:07:24,736 INFO L375 BasicCegarLoop]: trace histogram [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, 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] [2018-11-07 06:07:24,736 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:07:24,737 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:07:24,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1271296238, now seen corresponding path program 1 times [2018-11-07 06:07:24,737 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:07:24,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:07:24,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:07:24,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:07:24,738 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:07:24,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:07:25,164 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 105 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 06:07:25,164 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:07:25,164 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 06:07:25,164 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 257 with the following transitions: [2018-11-07 06:07:25,165 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [594], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [777], [781], [785], [789], [793], [797], [808], [812], [816], [820], [824], [828], [832], [843], [847], [851], [862], [866], [869], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 06:07:25,168 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 06:07:25,168 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 06:07:25,635 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 06:07:25,636 INFO L272 AbstractInterpreter]: Visited 157 different actions 468 times. Merged at 7 different actions 21 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-07 06:07:25,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:07:25,674 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 06:07:25,674 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:07:25,674 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 06:07:25,694 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:07:25,695 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 06:07:25,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:07:25,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 06:07:25,979 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 105 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 06:07:25,979 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 06:07:26,671 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 13 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 06:07:26,691 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 06:07:26,692 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2018-11-07 06:07:26,692 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 06:07:26,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-07 06:07:26,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-07 06:07:26,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2018-11-07 06:07:26,693 INFO L87 Difference]: Start difference. First operand 43314 states and 54518 transitions. Second operand 13 states. Received shutdown request... [2018-11-07 06:07:29,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-07 06:07:29,640 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 06:07:29,645 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 06:07:29,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:07:29 BoogieIcfgContainer [2018-11-07 06:07:29,646 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 06:07:29,647 INFO L168 Benchmark]: Toolchain (without parser) took 244775.76 ms. Allocated memory was 1.5 GB in the beginning and 3.6 GB in the end (delta: 2.1 GB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -67.6 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. [2018-11-07 06:07:29,648 INFO L168 Benchmark]: CDTParser took 0.21 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. [2018-11-07 06:07:29,648 INFO L168 Benchmark]: CACSL2BoogieTranslator took 902.66 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. [2018-11-07 06:07:29,649 INFO L168 Benchmark]: Boogie Procedure Inliner took 170.65 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 758.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -867.5 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. [2018-11-07 06:07:29,650 INFO L168 Benchmark]: Boogie Preprocessor took 142.23 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 06:07:29,650 INFO L168 Benchmark]: RCFGBuilder took 4173.11 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 183.3 MB). Peak memory consumption was 183.3 MB. Max. memory is 7.1 GB. [2018-11-07 06:07:29,651 INFO L168 Benchmark]: TraceAbstraction took 239381.24 ms. Allocated memory was 2.3 GB in the beginning and 3.6 GB in the end (delta: 1.3 GB). Free memory was 2.0 GB in the beginning and 1.5 GB in the end (delta: 553.1 MB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. [2018-11-07 06:07:29,655 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 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 902.66 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 170.65 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 758.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -867.5 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 142.23 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 4173.11 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 183.3 MB). Peak memory consumption was 183.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 239381.24 ms. Allocated memory was 2.3 GB in the beginning and 3.6 GB in the end (delta: 1.3 GB). Free memory was 2.0 GB in the beginning and 1.5 GB in the end (delta: 553.1 MB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 24]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 24). Cancelled while BasicCegarLoop was constructing difference of abstraction (43314states) and FLOYD_HOARE automaton (currently 29 states, 13 states before enhancement),while ReachableStatesComputation was computing reachable states (1813 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 293 locations, 1 error locations. TIMEOUT Result, 239.2s OverallTime, 13 OverallIterations, 3 TraceHistogramMax, 209.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2936 SDtfs, 29871 SDslu, 5108 SDs, 0 SdLazy, 48169 SolverSat, 9722 SolverUnsat, 40 SolverUnknown, 0 SolverNotchecked, 163.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3601 GetRequests, 3136 SyntacticMatches, 18 SemanticMatches, 447 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14133 ImplicationChecksByTransitivity, 40.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43314occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 5.2s AbstIntTime, 7 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 5.6s AutomataMinimizationTime, 12 MinimizatonAttempts, 15152 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 16.5s InterpolantComputationTime, 3622 NumberOfCodeBlocks, 3622 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 5168 ConstructedInterpolants, 16 QuantifiedInterpolants, 11539689 SizeOfPredicates, 26 NumberOfNonLiveVariables, 2963 ConjunctsInSsa, 88 ConjunctsInUnsatCore, 27 InterpolantComputations, 8 PerfectInterpolantSequences, 1053/1950 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown