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 --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label26_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-69f5bdd-m [2018-09-18 11:22:04,956 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-18 11:22:04,959 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-18 11:22:04,972 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-18 11:22:04,973 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-18 11:22:04,974 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-18 11:22:04,975 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-18 11:22:04,977 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-18 11:22:04,979 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-18 11:22:04,979 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-18 11:22:04,980 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-18 11:22:04,981 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-18 11:22:04,981 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-18 11:22:04,982 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-18 11:22:04,984 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-18 11:22:04,984 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-18 11:22:04,985 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-18 11:22:04,987 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-18 11:22:04,989 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-18 11:22:04,990 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-18 11:22:04,992 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-18 11:22:04,993 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-18 11:22:04,995 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-18 11:22:05,004 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-18 11:22:05,022 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-18 11:22:05,022 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-18 11:22:05,023 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-18 11:22:05,023 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-18 11:22:05,023 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-18 11:22:05,023 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-18 11:22:05,024 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-18 11:22:05,024 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-18 11:22:05,024 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-18 11:22:05,024 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-18 11:22:05,027 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-09-18 11:22:05,027 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-18 11:22:05,028 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-18 11:22:05,028 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-18 11:22:05,028 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-18 11:22:05,028 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-18 11:22:05,031 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-18 11:22:05,032 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-18 11:22:05,032 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-18 11:22:05,032 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-18 11:22:05,032 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-18 11:22:05,032 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-18 11:22:05,033 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-18 11:22:05,033 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-18 11:22:05,033 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-18 11:22:05,033 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-18 11:22:05,034 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-18 11:22:05,034 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-18 11:22:05,034 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-18 11:22:05,035 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-18 11:22:05,035 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-18 11:22:05,035 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-18 11:22:05,035 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-18 11:22:05,035 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-18 11:22:05,104 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-18 11:22:05,121 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-18 11:22:05,128 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-18 11:22:05,130 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-18 11:22:05,130 INFO L276 PluginConnector]: CDTParser initialized [2018-09-18 11:22:05,131 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label26_true-unreach-call.c [2018-09-18 11:22:05,481 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29e518fb3/ad73a8d6ab3f44659c070bddc2835282/FLAG4bac79557 [2018-09-18 11:22:05,873 INFO L277 CDTParser]: Found 1 translation units. [2018-09-18 11:22:05,874 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label26_true-unreach-call.c [2018-09-18 11:22:05,891 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29e518fb3/ad73a8d6ab3f44659c070bddc2835282/FLAG4bac79557 [2018-09-18 11:22:05,912 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29e518fb3/ad73a8d6ab3f44659c070bddc2835282 [2018-09-18 11:22:05,922 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-18 11:22:05,925 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-18 11:22:05,927 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-18 11:22:05,927 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-18 11:22:05,934 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-18 11:22:05,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 11:22:05" (1/1) ... [2018-09-18 11:22:05,938 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4aecc83f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:22:05, skipping insertion in model container [2018-09-18 11:22:05,939 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 11:22:05" (1/1) ... [2018-09-18 11:22:05,950 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-18 11:22:06,583 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 11:22:06,602 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-18 11:22:06,762 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 11:22:06,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:22:06 WrapperNode [2018-09-18 11:22:06,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-18 11:22:06,842 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-18 11:22:06,842 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-18 11:22:06,843 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-18 11:22:06,853 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:22:06" (1/1) ... [2018-09-18 11:22:06,906 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:22:06" (1/1) ... [2018-09-18 11:22:07,023 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-18 11:22:07,023 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-18 11:22:07,023 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-18 11:22:07,024 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-18 11:22:07,274 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:22:06" (1/1) ... [2018-09-18 11:22:07,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:22:06" (1/1) ... [2018-09-18 11:22:07,282 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:22:06" (1/1) ... [2018-09-18 11:22:07,282 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:22:06" (1/1) ... [2018-09-18 11:22:07,325 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:22:06" (1/1) ... [2018-09-18 11:22:07,353 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:22:06" (1/1) ... [2018-09-18 11:22:07,377 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:22:06" (1/1) ... [2018-09-18 11:22:07,394 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-18 11:22:07,395 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-18 11:22:07,395 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-18 11:22:07,396 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-18 11:22:07,397 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:22:06" (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 [2018-09-18 11:22:07,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-18 11:22:07,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-18 11:22:07,474 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-18 11:22:07,474 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-18 11:22:07,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-18 11:22:07,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-18 11:22:07,475 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-18 11:22:07,476 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-18 11:22:12,136 INFO L356 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-18 11:22:12,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 11:22:12 BoogieIcfgContainer [2018-09-18 11:22:12,137 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-18 11:22:12,138 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-18 11:22:12,139 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-18 11:22:12,142 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-18 11:22:12,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 11:22:05" (1/3) ... [2018-09-18 11:22:12,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ff1e9ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 11:22:12, skipping insertion in model container [2018-09-18 11:22:12,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:22:06" (2/3) ... [2018-09-18 11:22:12,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ff1e9ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 11:22:12, skipping insertion in model container [2018-09-18 11:22:12,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 11:22:12" (3/3) ... [2018-09-18 11:22:12,146 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label26_true-unreach-call.c [2018-09-18 11:22:12,157 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-18 11:22:12,166 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-18 11:22:12,223 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-18 11:22:12,223 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-18 11:22:12,224 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-18 11:22:12,224 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-18 11:22:12,224 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-18 11:22:12,224 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-18 11:22:12,225 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-18 11:22:12,225 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-18 11:22:12,225 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-18 11:22:12,252 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states. [2018-09-18 11:22:12,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-18 11:22:12,260 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:22:12,261 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:22:12,262 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:22:12,268 INFO L82 PathProgramCache]: Analyzing trace with hash -242196732, now seen corresponding path program 1 times [2018-09-18 11:22:12,271 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:22:12,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:22:12,321 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:22:12,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:22:12,322 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:22:12,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:22:12,802 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 11:22:12,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:22:12,930 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 11:22:12,930 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-18 11:22:12,930 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:22:12,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 11:22:12,954 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 11:22:12,955 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 11:22:12,958 INFO L87 Difference]: Start difference. First operand 293 states. Second operand 3 states. [2018-09-18 11:22:16,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:22:16,018 INFO L93 Difference]: Finished difference Result 782 states and 1372 transitions. [2018-09-18 11:22:16,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 11:22:16,022 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2018-09-18 11:22:16,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:22:16,045 INFO L225 Difference]: With dead ends: 782 [2018-09-18 11:22:16,045 INFO L226 Difference]: Without dead ends: 487 [2018-09-18 11:22:16,060 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 11:22:16,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2018-09-18 11:22:16,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 482. [2018-09-18 11:22:16,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 482 states. [2018-09-18 11:22:16,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 843 transitions. [2018-09-18 11:22:16,148 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 843 transitions. Word has length 46 [2018-09-18 11:22:16,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:22:16,149 INFO L480 AbstractCegarLoop]: Abstraction has 482 states and 843 transitions. [2018-09-18 11:22:16,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 11:22:16,150 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 843 transitions. [2018-09-18 11:22:16,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-09-18 11:22:16,158 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:22:16,158 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:22:16,158 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:22:16,159 INFO L82 PathProgramCache]: Analyzing trace with hash -567234993, now seen corresponding path program 1 times [2018-09-18 11:22:16,159 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:22:16,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:22:16,161 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:22:16,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:22:16,161 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:22:16,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:22:16,814 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:22:16,815 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 11:22:16,815 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-18 11:22:16,815 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:22:16,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-18 11:22:16,818 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-18 11:22:16,818 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-09-18 11:22:16,818 INFO L87 Difference]: Start difference. First operand 482 states and 843 transitions. Second operand 7 states. [2018-09-18 11:22:23,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:22:23,031 INFO L93 Difference]: Finished difference Result 1760 states and 3239 transitions. [2018-09-18 11:22:23,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-18 11:22:23,032 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 121 [2018-09-18 11:22:23,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:22:23,044 INFO L225 Difference]: With dead ends: 1760 [2018-09-18 11:22:23,044 INFO L226 Difference]: Without dead ends: 1284 [2018-09-18 11:22:23,050 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-09-18 11:22:23,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2018-09-18 11:22:23,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 1037. [2018-09-18 11:22:23,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1037 states. [2018-09-18 11:22:23,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 1685 transitions. [2018-09-18 11:22:23,158 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 1685 transitions. Word has length 121 [2018-09-18 11:22:23,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:22:23,158 INFO L480 AbstractCegarLoop]: Abstraction has 1037 states and 1685 transitions. [2018-09-18 11:22:23,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-18 11:22:23,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 1685 transitions. [2018-09-18 11:22:23,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-18 11:22:23,171 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:22:23,172 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 11:22:23,172 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:22:23,172 INFO L82 PathProgramCache]: Analyzing trace with hash -2085119040, now seen corresponding path program 1 times [2018-09-18 11:22:23,172 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:22:23,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:22:23,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:22:23,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:22:23,174 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:22:23,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:22:23,501 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 11:22:23,563 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 78 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 11:22:23,564 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:22:23,564 INFO L197 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 [2018-09-18 11:22:23,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:22:23,579 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:22:23,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:22:23,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:22:24,148 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-09-18 11:22:24,149 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:22:25,098 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 78 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 11:22:25,132 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 11:22:25,133 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-18 11:22:25,133 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:22:25,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 11:22:25,134 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 11:22:25,136 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-18 11:22:25,137 INFO L87 Difference]: Start difference. First operand 1037 states and 1685 transitions. Second operand 5 states. [2018-09-18 11:22:31,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:22:31,557 INFO L93 Difference]: Finished difference Result 3395 states and 5619 transitions. [2018-09-18 11:22:31,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 11:22:31,559 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 194 [2018-09-18 11:22:31,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:22:31,579 INFO L225 Difference]: With dead ends: 3395 [2018-09-18 11:22:31,579 INFO L226 Difference]: Without dead ends: 2364 [2018-09-18 11:22:31,587 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 383 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-09-18 11:22:31,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2018-09-18 11:22:31,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 2323. [2018-09-18 11:22:31,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2323 states. [2018-09-18 11:22:31,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2323 states to 2323 states and 3627 transitions. [2018-09-18 11:22:31,675 INFO L78 Accepts]: Start accepts. Automaton has 2323 states and 3627 transitions. Word has length 194 [2018-09-18 11:22:31,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:22:31,676 INFO L480 AbstractCegarLoop]: Abstraction has 2323 states and 3627 transitions. [2018-09-18 11:22:31,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 11:22:31,676 INFO L276 IsEmpty]: Start isEmpty. Operand 2323 states and 3627 transitions. [2018-09-18 11:22:31,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-09-18 11:22:31,684 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:22:31,684 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 11:22:31,685 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:22:31,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1893502118, now seen corresponding path program 1 times [2018-09-18 11:22:31,685 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:22:31,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:22:31,686 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:22:31,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:22:31,687 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:22:31,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:22:32,287 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-18 11:22:32,953 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-09-18 11:22:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 82 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:22:33,085 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:22:33,086 INFO L197 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 [2018-09-18 11:22:33,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:22:33,095 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:22:33,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:22:33,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:22:34,250 WARN L178 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 381 DAG size of output: 44 [2018-09-18 11:22:34,488 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 72 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:22:34,488 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:22:34,827 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2018-09-18 11:22:35,002 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2018-09-18 11:22:35,555 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-18 11:22:35,576 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 11:22:35,577 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [10, 9] total 18 [2018-09-18 11:22:35,577 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:22:35,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 11:22:35,578 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 11:22:35,578 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2018-09-18 11:22:35,579 INFO L87 Difference]: Start difference. First operand 2323 states and 3627 transitions. Second operand 3 states. [2018-09-18 11:22:37,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:22:37,135 INFO L93 Difference]: Finished difference Result 6016 states and 9663 transitions. [2018-09-18 11:22:37,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 11:22:37,141 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 238 [2018-09-18 11:22:37,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:22:37,164 INFO L225 Difference]: With dead ends: 6016 [2018-09-18 11:22:37,164 INFO L226 Difference]: Without dead ends: 3699 [2018-09-18 11:22:37,181 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 470 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2018-09-18 11:22:37,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3699 states. [2018-09-18 11:22:37,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3699 to 3365. [2018-09-18 11:22:37,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3365 states. [2018-09-18 11:22:37,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3365 states to 3365 states and 5072 transitions. [2018-09-18 11:22:37,275 INFO L78 Accepts]: Start accepts. Automaton has 3365 states and 5072 transitions. Word has length 238 [2018-09-18 11:22:37,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:22:37,276 INFO L480 AbstractCegarLoop]: Abstraction has 3365 states and 5072 transitions. [2018-09-18 11:22:37,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 11:22:37,276 INFO L276 IsEmpty]: Start isEmpty. Operand 3365 states and 5072 transitions. [2018-09-18 11:22:37,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2018-09-18 11:22:37,286 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:22:37,287 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:22:37,287 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:22:37,287 INFO L82 PathProgramCache]: Analyzing trace with hash -583065927, now seen corresponding path program 1 times [2018-09-18 11:22:37,288 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:22:37,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:22:37,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:22:37,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:22:37,289 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:22:37,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:22:37,848 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 162 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:22:37,848 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:22:37,848 INFO L197 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 [2018-09-18 11:22:37,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:22:37,862 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:22:37,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:22:37,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:22:38,148 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2018-09-18 11:22:38,148 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:22:38,591 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2018-09-18 11:22:38,611 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-18 11:22:38,611 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6] total 12 [2018-09-18 11:22:38,611 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:22:38,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 11:22:38,612 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 11:22:38,612 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-09-18 11:22:38,612 INFO L87 Difference]: Start difference. First operand 3365 states and 5072 transitions. Second operand 5 states. [2018-09-18 11:22:41,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:22:41,528 INFO L93 Difference]: Finished difference Result 9545 states and 14884 transitions. [2018-09-18 11:22:41,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-18 11:22:41,529 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 249 [2018-09-18 11:22:41,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:22:41,570 INFO L225 Difference]: With dead ends: 9545 [2018-09-18 11:22:41,570 INFO L226 Difference]: Without dead ends: 6186 [2018-09-18 11:22:41,607 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-09-18 11:22:41,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6186 states. [2018-09-18 11:22:41,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6186 to 5908. [2018-09-18 11:22:41,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5908 states. [2018-09-18 11:22:41,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5908 states to 5908 states and 8328 transitions. [2018-09-18 11:22:41,784 INFO L78 Accepts]: Start accepts. Automaton has 5908 states and 8328 transitions. Word has length 249 [2018-09-18 11:22:41,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:22:41,785 INFO L480 AbstractCegarLoop]: Abstraction has 5908 states and 8328 transitions. [2018-09-18 11:22:41,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 11:22:41,785 INFO L276 IsEmpty]: Start isEmpty. Operand 5908 states and 8328 transitions. [2018-09-18 11:22:41,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2018-09-18 11:22:41,809 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:22:41,809 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:22:41,810 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:22:41,810 INFO L82 PathProgramCache]: Analyzing trace with hash -92905283, now seen corresponding path program 1 times [2018-09-18 11:22:41,810 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:22:41,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:22:41,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:22:41,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:22:41,811 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:22:41,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:22:42,324 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 278 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-09-18 11:22:42,324 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:22:42,325 INFO L197 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 [2018-09-18 11:22:42,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:22:42,338 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:22:42,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:22:42,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:22:42,587 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2018-09-18 11:22:42,588 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:22:42,729 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2018-09-18 11:22:42,750 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-18 11:22:42,751 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-09-18 11:22:42,751 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:22:42,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 11:22:42,752 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 11:22:42,752 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-18 11:22:42,752 INFO L87 Difference]: Start difference. First operand 5908 states and 8328 transitions. Second operand 3 states. [2018-09-18 11:22:44,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:22:44,382 INFO L93 Difference]: Finished difference Result 13415 states and 19428 transitions. [2018-09-18 11:22:44,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 11:22:44,382 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 323 [2018-09-18 11:22:44,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:22:44,423 INFO L225 Difference]: With dead ends: 13415 [2018-09-18 11:22:44,423 INFO L226 Difference]: Without dead ends: 7513 [2018-09-18 11:22:44,465 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 645 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-18 11:22:44,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7513 states. [2018-09-18 11:22:44,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7513 to 7500. [2018-09-18 11:22:44,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7500 states. [2018-09-18 11:22:44,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7500 states to 7500 states and 10221 transitions. [2018-09-18 11:22:44,660 INFO L78 Accepts]: Start accepts. Automaton has 7500 states and 10221 transitions. Word has length 323 [2018-09-18 11:22:44,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:22:44,661 INFO L480 AbstractCegarLoop]: Abstraction has 7500 states and 10221 transitions. [2018-09-18 11:22:44,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 11:22:44,661 INFO L276 IsEmpty]: Start isEmpty. Operand 7500 states and 10221 transitions. [2018-09-18 11:22:44,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2018-09-18 11:22:44,696 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:22:44,696 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:22:44,697 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:22:44,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1931657218, now seen corresponding path program 1 times [2018-09-18 11:22:44,697 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:22:44,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:22:44,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:22:44,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:22:44,699 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:22:44,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:22:45,328 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 283 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-09-18 11:22:45,328 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:22:45,328 INFO L197 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 [2018-09-18 11:22:45,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:22:45,343 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:22:45,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:22:45,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:22:45,589 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 283 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-09-18 11:22:45,589 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:22:45,850 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 283 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-09-18 11:22:45,871 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:22:45,872 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:22:45,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:22:45,895 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:22:46,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:22:46,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:22:46,639 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 191 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:22:46,640 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:22:47,100 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 283 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-09-18 11:22:47,102 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:22:47,102 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 6, 5] total 8 [2018-09-18 11:22:47,103 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:22:47,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 11:22:47,104 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 11:22:47,104 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-09-18 11:22:47,105 INFO L87 Difference]: Start difference. First operand 7500 states and 10221 transitions. Second operand 6 states. [2018-09-18 11:22:50,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:22:50,171 INFO L93 Difference]: Finished difference Result 16805 states and 24351 transitions. [2018-09-18 11:22:50,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 11:22:50,172 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 328 [2018-09-18 11:22:50,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:22:50,220 INFO L225 Difference]: With dead ends: 16805 [2018-09-18 11:22:50,220 INFO L226 Difference]: Without dead ends: 9311 [2018-09-18 11:22:50,241 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1322 GetRequests, 1308 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-09-18 11:22:50,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9311 states. [2018-09-18 11:22:50,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9311 to 8969. [2018-09-18 11:22:50,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8969 states. [2018-09-18 11:22:50,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8969 states to 8969 states and 11628 transitions. [2018-09-18 11:22:50,486 INFO L78 Accepts]: Start accepts. Automaton has 8969 states and 11628 transitions. Word has length 328 [2018-09-18 11:22:50,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:22:50,487 INFO L480 AbstractCegarLoop]: Abstraction has 8969 states and 11628 transitions. [2018-09-18 11:22:50,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 11:22:50,487 INFO L276 IsEmpty]: Start isEmpty. Operand 8969 states and 11628 transitions. [2018-09-18 11:22:50,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2018-09-18 11:22:50,532 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:22:50,533 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:22:50,533 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:22:50,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1298299833, now seen corresponding path program 1 times [2018-09-18 11:22:50,534 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:22:50,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:22:50,536 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:22:50,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:22:50,536 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:22:50,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:22:51,164 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 199 proven. 78 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2018-09-18 11:22:51,165 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:22:51,165 INFO L197 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 [2018-09-18 11:22:51,176 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:22:51,176 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:22:51,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:22:51,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:22:51,425 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 324 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-09-18 11:22:51,425 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:22:51,550 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 199 proven. 78 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2018-09-18 11:22:51,572 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:22:51,573 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:22:51,589 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:22:51,589 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:22:51,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:22:51,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:22:51,916 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 324 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-09-18 11:22:51,916 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:22:52,138 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 199 proven. 78 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2018-09-18 11:22:52,141 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:22:52,141 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 13 [2018-09-18 11:22:52,141 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:22:52,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 11:22:52,142 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 11:22:52,143 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-09-18 11:22:52,143 INFO L87 Difference]: Start difference. First operand 8969 states and 11628 transitions. Second operand 9 states. [2018-09-18 11:22:56,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:22:56,031 INFO L93 Difference]: Finished difference Result 18875 states and 25466 transitions. [2018-09-18 11:22:56,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-18 11:22:56,035 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 348 [2018-09-18 11:22:56,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:22:56,073 INFO L225 Difference]: With dead ends: 18875 [2018-09-18 11:22:56,073 INFO L226 Difference]: Without dead ends: 9912 [2018-09-18 11:22:56,114 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1408 GetRequests, 1385 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2018-09-18 11:22:56,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9912 states. [2018-09-18 11:22:56,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9912 to 9837. [2018-09-18 11:22:56,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9837 states. [2018-09-18 11:22:56,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9837 states to 9837 states and 12631 transitions. [2018-09-18 11:22:56,335 INFO L78 Accepts]: Start accepts. Automaton has 9837 states and 12631 transitions. Word has length 348 [2018-09-18 11:22:56,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:22:56,335 INFO L480 AbstractCegarLoop]: Abstraction has 9837 states and 12631 transitions. [2018-09-18 11:22:56,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-18 11:22:56,336 INFO L276 IsEmpty]: Start isEmpty. Operand 9837 states and 12631 transitions. [2018-09-18 11:22:56,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2018-09-18 11:22:56,378 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:22:56,378 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-18 11:22:56,379 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:22:56,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1706198452, now seen corresponding path program 1 times [2018-09-18 11:22:56,379 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:22:56,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:22:56,380 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:22:56,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:22:56,381 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:22:56,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:22:56,849 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-18 11:22:57,043 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-18 11:22:57,537 WARN L178 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-09-18 11:22:57,861 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 300 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2018-09-18 11:22:57,862 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:22:57,862 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:22:57,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:22:57,872 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:22:57,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:22:57,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:22:59,082 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 300 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2018-09-18 11:22:59,082 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:22:59,650 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 300 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2018-09-18 11:22:59,670 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:22:59,670 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:22:59,689 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:22:59,689 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:22:59,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:22:59,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:23:00,093 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 300 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2018-09-18 11:23:00,093 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:23:00,371 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 300 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2018-09-18 11:23:00,374 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:23:00,374 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 8, 5, 5] total 24 [2018-09-18 11:23:00,374 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:23:00,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-18 11:23:00,375 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-18 11:23:00,376 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2018-09-18 11:23:00,376 INFO L87 Difference]: Start difference. First operand 9837 states and 12631 transitions. Second operand 15 states. [2018-09-18 11:23:01,056 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2018-09-18 11:23:01,926 WARN L178 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2018-09-18 11:23:02,959 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 17 [2018-09-18 11:23:04,037 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2018-09-18 11:23:04,214 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2018-09-18 11:23:04,706 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2018-09-18 11:23:05,729 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2018-09-18 11:23:06,848 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2018-09-18 11:23:11,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:23:11,054 INFO L93 Difference]: Finished difference Result 23994 states and 32164 transitions. [2018-09-18 11:23:11,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-18 11:23:11,055 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 377 [2018-09-18 11:23:11,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:23:11,115 INFO L225 Difference]: With dead ends: 23994 [2018-09-18 11:23:11,116 INFO L226 Difference]: Without dead ends: 14163 [2018-09-18 11:23:11,154 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1575 GetRequests, 1518 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=682, Invalid=2510, Unknown=0, NotChecked=0, Total=3192 [2018-09-18 11:23:11,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14163 states. [2018-09-18 11:23:11,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14163 to 10893. [2018-09-18 11:23:11,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10893 states. [2018-09-18 11:23:11,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10893 states to 10893 states and 13349 transitions. [2018-09-18 11:23:11,441 INFO L78 Accepts]: Start accepts. Automaton has 10893 states and 13349 transitions. Word has length 377 [2018-09-18 11:23:11,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:23:11,442 INFO L480 AbstractCegarLoop]: Abstraction has 10893 states and 13349 transitions. [2018-09-18 11:23:11,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-18 11:23:11,443 INFO L276 IsEmpty]: Start isEmpty. Operand 10893 states and 13349 transitions. [2018-09-18 11:23:11,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2018-09-18 11:23:11,475 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:23:11,475 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:23:11,476 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:23:11,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1510440066, now seen corresponding path program 1 times [2018-09-18 11:23:11,476 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:23:11,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:23:11,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:23:11,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:23:11,477 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:23:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:23:12,250 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 367 proven. 2 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-09-18 11:23:12,251 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:23:12,251 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:23:12,268 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:23:12,269 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:23:12,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:23:12,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:23:13,079 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 367 proven. 2 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-09-18 11:23:13,080 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:23:13,576 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 367 proven. 2 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-09-18 11:23:13,596 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:23:13,596 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:23:13,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:23:13,612 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:23:13,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:23:13,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:23:14,049 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 367 proven. 2 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-09-18 11:23:14,050 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:23:14,448 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 367 proven. 2 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-09-18 11:23:14,450 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:23:14,450 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-09-18 11:23:14,450 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:23:14,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 11:23:14,451 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 11:23:14,451 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-18 11:23:14,452 INFO L87 Difference]: Start difference. First operand 10893 states and 13349 transitions. Second operand 9 states. [2018-09-18 11:23:18,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:23:18,012 INFO L93 Difference]: Finished difference Result 24123 states and 30261 transitions. [2018-09-18 11:23:18,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-18 11:23:18,013 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 433 [2018-09-18 11:23:18,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:23:18,046 INFO L225 Difference]: With dead ends: 24123 [2018-09-18 11:23:18,046 INFO L226 Difference]: Without dead ends: 13236 [2018-09-18 11:23:18,070 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1750 GetRequests, 1727 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2018-09-18 11:23:18,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13236 states. [2018-09-18 11:23:18,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13236 to 13081. [2018-09-18 11:23:18,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13081 states. [2018-09-18 11:23:18,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13081 states to 13081 states and 15673 transitions. [2018-09-18 11:23:18,300 INFO L78 Accepts]: Start accepts. Automaton has 13081 states and 15673 transitions. Word has length 433 [2018-09-18 11:23:18,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:23:18,301 INFO L480 AbstractCegarLoop]: Abstraction has 13081 states and 15673 transitions. [2018-09-18 11:23:18,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-18 11:23:18,302 INFO L276 IsEmpty]: Start isEmpty. Operand 13081 states and 15673 transitions. [2018-09-18 11:23:18,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2018-09-18 11:23:18,327 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:23:18,328 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:23:18,328 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:23:18,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1671852664, now seen corresponding path program 1 times [2018-09-18 11:23:18,329 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:23:18,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:23:18,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:23:18,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:23:18,330 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:23:18,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:23:18,690 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2018-09-18 11:23:18,691 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 11:23:18,691 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-18 11:23:18,691 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:23:18,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 11:23:18,692 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 11:23:18,692 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 11:23:18,692 INFO L87 Difference]: Start difference. First operand 13081 states and 15673 transitions. Second operand 3 states. [2018-09-18 11:23:20,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:23:20,944 INFO L93 Difference]: Finished difference Result 29913 states and 36564 transitions. [2018-09-18 11:23:20,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 11:23:20,945 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 462 [2018-09-18 11:23:20,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:23:20,982 INFO L225 Difference]: With dead ends: 29913 [2018-09-18 11:23:20,982 INFO L226 Difference]: Without dead ends: 15930 [2018-09-18 11:23:21,016 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 [2018-09-18 11:23:21,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15930 states. [2018-09-18 11:23:21,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15930 to 15879. [2018-09-18 11:23:21,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15879 states. [2018-09-18 11:23:21,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15879 states to 15879 states and 18589 transitions. [2018-09-18 11:23:21,276 INFO L78 Accepts]: Start accepts. Automaton has 15879 states and 18589 transitions. Word has length 462 [2018-09-18 11:23:21,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:23:21,278 INFO L480 AbstractCegarLoop]: Abstraction has 15879 states and 18589 transitions. [2018-09-18 11:23:21,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 11:23:21,278 INFO L276 IsEmpty]: Start isEmpty. Operand 15879 states and 18589 transitions. [2018-09-18 11:23:21,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2018-09-18 11:23:21,308 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:23:21,309 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-18 11:23:21,309 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:23:21,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1104413609, now seen corresponding path program 1 times [2018-09-18 11:23:21,309 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:23:21,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:23:21,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:23:21,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:23:21,310 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:23:21,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:23:22,099 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 167 proven. 394 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2018-09-18 11:23:22,099 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:23:22,100 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:23:22,108 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:23:22,108 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:23:22,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:23:22,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:23:22,585 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 622 trivial. 0 not checked. [2018-09-18 11:23:22,585 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:23:22,895 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 622 trivial. 0 not checked. [2018-09-18 11:23:22,917 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-18 11:23:22,918 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 9 [2018-09-18 11:23:22,918 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:23:22,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 11:23:22,918 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 11:23:22,919 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-09-18 11:23:22,919 INFO L87 Difference]: Start difference. First operand 15879 states and 18589 transitions. Second operand 3 states. [2018-09-18 11:23:25,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:23:25,271 INFO L93 Difference]: Finished difference Result 36509 states and 43817 transitions. [2018-09-18 11:23:25,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 11:23:25,272 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 526 [2018-09-18 11:23:25,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:23:25,323 INFO L225 Difference]: With dead ends: 36509 [2018-09-18 11:23:25,323 INFO L226 Difference]: Without dead ends: 20825 [2018-09-18 11:23:25,360 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1060 GetRequests, 1053 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-09-18 11:23:25,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20825 states. [2018-09-18 11:23:25,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20825 to 20825. [2018-09-18 11:23:25,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20825 states. [2018-09-18 11:23:25,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20825 states to 20825 states and 24665 transitions. [2018-09-18 11:23:25,745 INFO L78 Accepts]: Start accepts. Automaton has 20825 states and 24665 transitions. Word has length 526 [2018-09-18 11:23:25,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:23:25,746 INFO L480 AbstractCegarLoop]: Abstraction has 20825 states and 24665 transitions. [2018-09-18 11:23:25,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 11:23:25,746 INFO L276 IsEmpty]: Start isEmpty. Operand 20825 states and 24665 transitions. [2018-09-18 11:23:25,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2018-09-18 11:23:25,794 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:23:25,794 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:23:25,795 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:23:25,795 INFO L82 PathProgramCache]: Analyzing trace with hash 2022942990, now seen corresponding path program 1 times [2018-09-18 11:23:25,795 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:23:25,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:23:25,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:23:25,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:23:25,796 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:23:25,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:23:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 775 backedges. 167 proven. 406 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2018-09-18 11:23:26,367 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:23:26,367 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:23:26,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:23:26,378 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:23:26,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:23:26,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:23:31,014 INFO L134 CoverageAnalysis]: Checked inductivity of 775 backedges. 497 proven. 107 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2018-09-18 11:23:31,014 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:23:33,312 WARN L178 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 39 DAG size of output: 15 [2018-09-18 11:23:34,722 INFO L134 CoverageAnalysis]: Checked inductivity of 775 backedges. 494 proven. 281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:23:34,743 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:23:34,744 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:23:34,760 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:23:34,761 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:23:35,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:23:35,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:23:37,243 INFO L134 CoverageAnalysis]: Checked inductivity of 775 backedges. 497 proven. 107 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2018-09-18 11:23:37,243 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:23:40,463 INFO L134 CoverageAnalysis]: Checked inductivity of 775 backedges. 494 proven. 281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:23:40,466 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:23:40,466 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 11, 8, 11] total 23 [2018-09-18 11:23:40,466 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:23:40,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-18 11:23:40,468 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-18 11:23:40,468 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=377, Unknown=4, NotChecked=0, Total=506 [2018-09-18 11:23:40,468 INFO L87 Difference]: Start difference. First operand 20825 states and 24665 transitions. Second operand 11 states. [2018-09-18 11:23:53,099 WARN L178 SmtUtils]: Spent 554.00 ms on a formula simplification that was a NOOP. DAG size: 17 Received shutdown request... [2018-09-18 11:26:19,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-18 11:26:19,136 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-18 11:26:19,142 WARN L206 ceAbstractionStarter]: Timeout [2018-09-18 11:26:19,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.09 11:26:19 BoogieIcfgContainer [2018-09-18 11:26:19,143 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-18 11:26:19,144 INFO L168 Benchmark]: Toolchain (without parser) took 253220.84 ms. Allocated memory was 1.5 GB in the beginning and 3.6 GB in the end (delta: 2.0 GB). Free memory was 1.4 GB in the beginning and 2.7 GB in the end (delta: -1.3 GB). Peak memory consumption was 753.4 MB. Max. memory is 7.1 GB. [2018-09-18 11:26:19,145 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-18 11:26:19,145 INFO L168 Benchmark]: CACSL2BoogieTranslator took 914.95 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: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. [2018-09-18 11:26:19,146 INFO L168 Benchmark]: Boogie Procedure Inliner took 180.71 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-18 11:26:19,146 INFO L168 Benchmark]: Boogie Preprocessor took 371.58 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 820.5 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -947.4 MB). Peak memory consumption was 49.5 MB. Max. memory is 7.1 GB. [2018-09-18 11:26:19,147 INFO L168 Benchmark]: RCFGBuilder took 4741.97 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 183.1 MB). Peak memory consumption was 183.1 MB. Max. memory is 7.1 GB. [2018-09-18 11:26:19,148 INFO L168 Benchmark]: TraceAbstraction took 247004.25 ms. Allocated memory was 2.4 GB in the beginning and 3.6 GB in the end (delta: 1.2 GB). Free memory was 2.1 GB in the beginning and 2.7 GB in the end (delta: -612.2 MB). Peak memory consumption was 602.0 MB. Max. memory is 7.1 GB. [2018-09-18 11:26:19,152 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 914.95 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: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 180.71 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 371.58 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 820.5 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -947.4 MB). Peak memory consumption was 49.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4741.97 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 183.1 MB). Peak memory consumption was 183.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 247004.25 ms. Allocated memory was 2.4 GB in the beginning and 3.6 GB in the end (delta: 1.2 GB). Free memory was 2.1 GB in the beginning and 2.7 GB in the end (delta: -612.2 MB). Peak memory consumption was 602.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 123]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 123). Cancelled while BasicCegarLoop was constructing difference of abstraction (20825states) and FLOYD_HOARE automaton (currently 26 states, 11 states before enhancement), while ReachableStatesComputation was computing reachable states (47041 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 293 locations, 1 error locations. TIMEOUT Result, 246.9s OverallTime, 13 OverallIterations, 5 TraceHistogramMax, 207.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2732 SDtfs, 13935 SDslu, 2591 SDs, 0 SdLazy, 24519 SolverSat, 5970 SolverUnsat, 76 SolverUnknown, 0 SolverNotchecked, 180.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11338 GetRequests, 11104 SyntacticMatches, 37 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1405 ImplicationChecksByTransitivity, 38.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20825occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 2.3s AutomataMinimizationTime, 12 MinimizatonAttempts, 4811 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 2.9s SatisfiabilityAnalysisTime, 31.9s InterpolantComputationTime, 9737 NumberOfCodeBlocks, 9737 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 15256 ConstructedInterpolants, 313 QuantifiedInterpolants, 21221730 SizeOfPredicates, 25 NumberOfNonLiveVariables, 9300 ConjunctsInSsa, 139 ConjunctsInUnsatCore, 43 InterpolantComputations, 11 PerfectInterpolantSequences, 14956/17255 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem11_label26_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-18_11-26-19-166.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem11_label26_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-18_11-26-19-166.csv Completed graceful shutdown