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/Problem18_label28_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-69f5bdd-m [2018-09-18 12:22:15,315 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-18 12:22:15,317 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-18 12:22:15,330 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-18 12:22:15,331 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-18 12:22:15,333 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-18 12:22:15,334 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-18 12:22:15,337 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-18 12:22:15,341 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-18 12:22:15,342 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-18 12:22:15,343 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-18 12:22:15,344 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-18 12:22:15,345 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-18 12:22:15,348 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-18 12:22:15,354 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-18 12:22:15,355 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-18 12:22:15,360 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-18 12:22:15,362 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-18 12:22:15,366 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-18 12:22:15,373 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-18 12:22:15,374 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-18 12:22:15,377 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-18 12:22:15,380 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-18 12:22:15,399 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 12:22:15,428 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-18 12:22:15,428 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-18 12:22:15,431 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-18 12:22:15,432 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-18 12:22:15,432 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-18 12:22:15,432 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-18 12:22:15,433 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-18 12:22:15,433 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-18 12:22:15,433 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-18 12:22:15,436 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-18 12:22:15,437 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-09-18 12:22:15,437 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-18 12:22:15,438 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-18 12:22:15,438 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-18 12:22:15,438 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-18 12:22:15,439 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-18 12:22:15,439 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-18 12:22:15,439 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-18 12:22:15,439 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-18 12:22:15,439 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-18 12:22:15,440 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-18 12:22:15,440 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-18 12:22:15,440 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-18 12:22:15,440 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-18 12:22:15,442 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-18 12:22:15,442 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-18 12:22:15,443 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-18 12:22:15,443 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-18 12:22:15,443 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-18 12:22:15,443 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-18 12:22:15,444 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-18 12:22:15,444 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-18 12:22:15,444 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-18 12:22:15,444 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-18 12:22:15,518 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-18 12:22:15,536 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-18 12:22:15,543 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-18 12:22:15,545 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-18 12:22:15,546 INFO L276 PluginConnector]: CDTParser initialized [2018-09-18 12:22:15,546 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label28_true-unreach-call.c [2018-09-18 12:22:15,903 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c70ea557/13e71ff5b9dd422191ed103a4b9bb433/FLAG60c0a309a [2018-09-18 12:22:16,360 INFO L277 CDTParser]: Found 1 translation units. [2018-09-18 12:22:16,361 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label28_true-unreach-call.c [2018-09-18 12:22:16,392 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c70ea557/13e71ff5b9dd422191ed103a4b9bb433/FLAG60c0a309a [2018-09-18 12:22:16,414 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c70ea557/13e71ff5b9dd422191ed103a4b9bb433 [2018-09-18 12:22:16,428 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-18 12:22:16,433 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-18 12:22:16,434 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-18 12:22:16,434 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-18 12:22:16,443 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-18 12:22:16,444 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 12:22:16" (1/1) ... [2018-09-18 12:22:16,447 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f056338 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:22:16, skipping insertion in model container [2018-09-18 12:22:16,448 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 12:22:16" (1/1) ... [2018-09-18 12:22:16,461 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-18 12:22:17,562 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 12:22:17,586 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-18 12:22:18,041 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 12:22:18,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:22:18 WrapperNode [2018-09-18 12:22:18,197 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-18 12:22:18,199 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-18 12:22:18,199 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-18 12:22:18,199 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-18 12:22:18,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:22:18" (1/1) ... [2018-09-18 12:22:18,281 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:22:18" (1/1) ... [2018-09-18 12:22:18,378 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-18 12:22:18,379 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-18 12:22:18,379 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-18 12:22:18,379 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-18 12:22:18,781 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:22:18" (1/1) ... [2018-09-18 12:22:18,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:22:18" (1/1) ... [2018-09-18 12:22:18,801 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:22:18" (1/1) ... [2018-09-18 12:22:18,802 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:22:18" (1/1) ... [2018-09-18 12:22:18,891 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:22:18" (1/1) ... [2018-09-18 12:22:18,922 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:22:18" (1/1) ... [2018-09-18 12:22:18,949 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:22:18" (1/1) ... [2018-09-18 12:22:18,988 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-18 12:22:18,989 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-18 12:22:18,989 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-18 12:22:18,989 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-18 12:22:18,990 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:22:18" (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 12:22:19,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-18 12:22:19,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-18 12:22:19,063 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-09-18 12:22:19,063 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-09-18 12:22:19,064 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-09-18 12:22:19,064 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-09-18 12:22:19,064 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-18 12:22:19,064 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-18 12:22:19,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-18 12:22:19,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-18 12:22:19,065 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-18 12:22:19,065 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-18 12:22:27,039 INFO L356 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-18 12:22:27,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 12:22:27 BoogieIcfgContainer [2018-09-18 12:22:27,040 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-18 12:22:27,041 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-18 12:22:27,041 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-18 12:22:27,044 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-18 12:22:27,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 12:22:16" (1/3) ... [2018-09-18 12:22:27,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50effa89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 12:22:27, skipping insertion in model container [2018-09-18 12:22:27,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:22:18" (2/3) ... [2018-09-18 12:22:27,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50effa89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 12:22:27, skipping insertion in model container [2018-09-18 12:22:27,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 12:22:27" (3/3) ... [2018-09-18 12:22:27,048 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label28_true-unreach-call.c [2018-09-18 12:22:27,058 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-18 12:22:27,067 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-18 12:22:27,137 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-18 12:22:27,138 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-18 12:22:27,138 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-18 12:22:27,138 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-18 12:22:27,138 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-18 12:22:27,138 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-18 12:22:27,139 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-18 12:22:27,139 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-18 12:22:27,139 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-18 12:22:27,183 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states. [2018-09-18 12:22:27,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-18 12:22:27,196 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:22:27,197 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, 1, 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 12:22:27,199 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:22:27,204 INFO L82 PathProgramCache]: Analyzing trace with hash -2076114681, now seen corresponding path program 1 times [2018-09-18 12:22:27,206 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:22:27,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:22:27,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:22:27,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:22:27,255 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:22:27,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:22:27,764 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 12:22:27,766 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 12:22:27,767 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-18 12:22:27,767 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:22:27,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-18 12:22:27,789 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-18 12:22:27,790 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 12:22:27,793 INFO L87 Difference]: Start difference. First operand 775 states. Second operand 4 states. [2018-09-18 12:22:38,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:22:38,657 INFO L93 Difference]: Finished difference Result 2974 states and 5747 transitions. [2018-09-18 12:22:38,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-18 12:22:38,658 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2018-09-18 12:22:38,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:22:38,695 INFO L225 Difference]: With dead ends: 2974 [2018-09-18 12:22:38,695 INFO L226 Difference]: Without dead ends: 2193 [2018-09-18 12:22:38,705 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 12:22:38,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2193 states. [2018-09-18 12:22:38,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2193 to 1474. [2018-09-18 12:22:38,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1474 states. [2018-09-18 12:22:38,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 2384 transitions. [2018-09-18 12:22:38,879 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 2384 transitions. Word has length 71 [2018-09-18 12:22:38,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:22:38,880 INFO L480 AbstractCegarLoop]: Abstraction has 1474 states and 2384 transitions. [2018-09-18 12:22:38,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-18 12:22:38,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 2384 transitions. [2018-09-18 12:22:38,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-09-18 12:22:38,895 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:22:38,895 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, 2, 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] [2018-09-18 12:22:38,896 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:22:38,896 INFO L82 PathProgramCache]: Analyzing trace with hash 865904024, now seen corresponding path program 1 times [2018-09-18 12:22:38,896 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:22:38,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:22:38,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:22:38,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:22:38,899 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:22:38,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:22:39,190 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:22:39,191 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 12:22:39,191 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-18 12:22:39,191 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:22:39,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 12:22:39,194 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 12:22:39,194 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-18 12:22:39,194 INFO L87 Difference]: Start difference. First operand 1474 states and 2384 transitions. Second operand 5 states. [2018-09-18 12:22:48,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:22:48,836 INFO L93 Difference]: Finished difference Result 4422 states and 7235 transitions. [2018-09-18 12:22:48,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 12:22:48,837 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 141 [2018-09-18 12:22:48,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:22:48,860 INFO L225 Difference]: With dead ends: 4422 [2018-09-18 12:22:48,860 INFO L226 Difference]: Without dead ends: 2954 [2018-09-18 12:22:48,866 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-09-18 12:22:48,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2018-09-18 12:22:48,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2930. [2018-09-18 12:22:48,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2930 states. [2018-09-18 12:22:48,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2930 states to 2930 states and 4516 transitions. [2018-09-18 12:22:48,967 INFO L78 Accepts]: Start accepts. Automaton has 2930 states and 4516 transitions. Word has length 141 [2018-09-18 12:22:48,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:22:48,968 INFO L480 AbstractCegarLoop]: Abstraction has 2930 states and 4516 transitions. [2018-09-18 12:22:48,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 12:22:48,968 INFO L276 IsEmpty]: Start isEmpty. Operand 2930 states and 4516 transitions. [2018-09-18 12:22:48,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-09-18 12:22:48,980 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:22:48,980 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:22:48,980 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:22:48,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1444523296, now seen corresponding path program 1 times [2018-09-18 12:22:48,981 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:22:48,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:22:48,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:22:48,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:22:48,983 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:22:49,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:22:49,192 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:22:49,192 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 12:22:49,193 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-18 12:22:49,193 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:22:49,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 12:22:49,194 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 12:22:49,194 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-18 12:22:49,195 INFO L87 Difference]: Start difference. First operand 2930 states and 4516 transitions. Second operand 6 states. [2018-09-18 12:22:54,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:22:54,599 INFO L93 Difference]: Finished difference Result 7357 states and 11327 transitions. [2018-09-18 12:22:54,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 12:22:54,611 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 145 [2018-09-18 12:22:54,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:22:54,642 INFO L225 Difference]: With dead ends: 7357 [2018-09-18 12:22:54,643 INFO L226 Difference]: Without dead ends: 4433 [2018-09-18 12:22:54,653 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-18 12:22:54,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4433 states. [2018-09-18 12:22:54,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4433 to 4400. [2018-09-18 12:22:54,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4400 states. [2018-09-18 12:22:54,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4400 states to 4400 states and 5842 transitions. [2018-09-18 12:22:54,805 INFO L78 Accepts]: Start accepts. Automaton has 4400 states and 5842 transitions. Word has length 145 [2018-09-18 12:22:54,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:22:54,805 INFO L480 AbstractCegarLoop]: Abstraction has 4400 states and 5842 transitions. [2018-09-18 12:22:54,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 12:22:54,806 INFO L276 IsEmpty]: Start isEmpty. Operand 4400 states and 5842 transitions. [2018-09-18 12:22:54,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-18 12:22:54,809 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:22:54,809 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, 2, 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 12:22:54,810 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:22:54,810 INFO L82 PathProgramCache]: Analyzing trace with hash -797874491, now seen corresponding path program 1 times [2018-09-18 12:22:54,810 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:22:54,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:22:54,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:22:54,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:22:54,812 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:22:54,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:22:55,096 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:22:55,096 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 12:22:55,096 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-18 12:22:55,097 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:22:55,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-18 12:22:55,098 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-18 12:22:55,098 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 12:22:55,099 INFO L87 Difference]: Start difference. First operand 4400 states and 5842 transitions. Second operand 4 states. [2018-09-18 12:23:02,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:23:02,206 INFO L93 Difference]: Finished difference Result 17356 states and 23632 transitions. [2018-09-18 12:23:02,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-18 12:23:02,207 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 178 [2018-09-18 12:23:02,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:23:02,271 INFO L225 Difference]: With dead ends: 17356 [2018-09-18 12:23:02,271 INFO L226 Difference]: Without dead ends: 12962 [2018-09-18 12:23:02,298 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 12:23:02,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12962 states. [2018-09-18 12:23:02,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12962 to 12962. [2018-09-18 12:23:02,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12962 states. [2018-09-18 12:23:02,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12962 states to 12962 states and 16372 transitions. [2018-09-18 12:23:02,605 INFO L78 Accepts]: Start accepts. Automaton has 12962 states and 16372 transitions. Word has length 178 [2018-09-18 12:23:02,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:23:02,606 INFO L480 AbstractCegarLoop]: Abstraction has 12962 states and 16372 transitions. [2018-09-18 12:23:02,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-18 12:23:02,607 INFO L276 IsEmpty]: Start isEmpty. Operand 12962 states and 16372 transitions. [2018-09-18 12:23:02,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2018-09-18 12:23:02,614 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:23:02,615 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, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:23:02,615 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:23:02,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1768524495, now seen corresponding path program 1 times [2018-09-18 12:23:02,615 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:23:02,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:23:02,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:23:02,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:23:02,617 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:23:02,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:23:03,246 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 221 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:23:03,247 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:23:03,247 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 12:23:03,262 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:23:03,262 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:23:03,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:23:03,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:23:03,754 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 221 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:23:03,754 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:23:04,039 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 221 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:23:04,061 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:23:04,061 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 3 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 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 12:23:04,078 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:23:04,078 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:23:04,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:23:04,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:23:04,716 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 221 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:23:04,717 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:23:05,066 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 221 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:23:05,068 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:23:05,068 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 16 [2018-09-18 12:23:05,068 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:23:05,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 12:23:05,070 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 12:23:05,070 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2018-09-18 12:23:05,070 INFO L87 Difference]: Start difference. First operand 12962 states and 16372 transitions. Second operand 9 states. [2018-09-18 12:23:24,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:23:24,648 INFO L93 Difference]: Finished difference Result 60570 states and 86734 transitions. [2018-09-18 12:23:24,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-18 12:23:24,649 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 289 [2018-09-18 12:23:24,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:23:25,222 INFO L225 Difference]: With dead ends: 60570 [2018-09-18 12:23:25,222 INFO L226 Difference]: Without dead ends: 47614 [2018-09-18 12:23:25,383 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1177 GetRequests, 1153 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2018-09-18 12:23:25,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47614 states. [2018-09-18 12:23:26,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47614 to 47329. [2018-09-18 12:23:26,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47329 states. [2018-09-18 12:23:26,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47329 states to 47329 states and 61774 transitions. [2018-09-18 12:23:26,737 INFO L78 Accepts]: Start accepts. Automaton has 47329 states and 61774 transitions. Word has length 289 [2018-09-18 12:23:26,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:23:26,738 INFO L480 AbstractCegarLoop]: Abstraction has 47329 states and 61774 transitions. [2018-09-18 12:23:26,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-18 12:23:26,738 INFO L276 IsEmpty]: Start isEmpty. Operand 47329 states and 61774 transitions. [2018-09-18 12:23:26,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2018-09-18 12:23:26,754 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:23:26,755 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, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:23:26,755 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:23:26,756 INFO L82 PathProgramCache]: Analyzing trace with hash 942966389, now seen corresponding path program 1 times [2018-09-18 12:23:26,757 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:23:26,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:23:26,758 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:23:26,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:23:26,758 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:23:26,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:23:27,465 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-18 12:23:27,803 WARN L178 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-09-18 12:23:28,892 WARN L178 SmtUtils]: Spent 987.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2018-09-18 12:23:29,650 WARN L178 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2018-09-18 12:23:30,348 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 224 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:23:30,348 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:23:30,348 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 12:23:30,356 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:23:30,356 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:23:30,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:23:30,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:23:31,076 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2018-09-18 12:23:31,077 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:23:31,246 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2018-09-18 12:23:31,268 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-18 12:23:31,268 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [13] total 15 [2018-09-18 12:23:31,268 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:23:31,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 12:23:31,269 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 12:23:31,269 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2018-09-18 12:23:31,270 INFO L87 Difference]: Start difference. First operand 47329 states and 61774 transitions. Second operand 3 states. [2018-09-18 12:23:35,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:23:35,721 INFO L93 Difference]: Finished difference Result 94652 states and 123652 transitions. [2018-09-18 12:23:35,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 12:23:35,730 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 393 [2018-09-18 12:23:35,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:23:35,952 INFO L225 Difference]: With dead ends: 94652 [2018-09-18 12:23:35,952 INFO L226 Difference]: Without dead ends: 47329 [2018-09-18 12:23:36,152 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 798 GetRequests, 785 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2018-09-18 12:23:36,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47329 states. [2018-09-18 12:23:37,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47329 to 47329. [2018-09-18 12:23:37,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47329 states. [2018-09-18 12:23:37,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47329 states to 47329 states and 59455 transitions. [2018-09-18 12:23:37,228 INFO L78 Accepts]: Start accepts. Automaton has 47329 states and 59455 transitions. Word has length 393 [2018-09-18 12:23:37,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:23:37,230 INFO L480 AbstractCegarLoop]: Abstraction has 47329 states and 59455 transitions. [2018-09-18 12:23:37,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 12:23:37,230 INFO L276 IsEmpty]: Start isEmpty. Operand 47329 states and 59455 transitions. [2018-09-18 12:23:37,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2018-09-18 12:23:37,254 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:23:37,254 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, 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, 3, 3, 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] [2018-09-18 12:23:37,255 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:23:37,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1869243030, now seen corresponding path program 1 times [2018-09-18 12:23:37,255 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:23:37,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:23:37,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:23:37,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:23:37,256 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:23:37,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:23:37,910 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-18 12:23:38,130 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-09-18 12:23:38,624 WARN L178 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2018-09-18 12:23:39,171 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 362 proven. 174 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2018-09-18 12:23:39,171 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:23:39,172 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 12:23:39,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:23:39,179 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:23:39,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:23:39,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:23:39,544 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 528 proven. 2 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2018-09-18 12:23:39,544 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:23:39,784 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 528 proven. 2 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2018-09-18 12:23:39,806 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:23:39,806 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 6 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 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 12:23:39,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:23:39,827 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:23:40,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:23:40,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:23:40,237 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 528 proven. 2 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2018-09-18 12:23:40,238 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:23:40,705 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 528 proven. 2 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2018-09-18 12:23:40,707 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:23:40,708 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5, 5, 5] total 22 [2018-09-18 12:23:40,708 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:23:40,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-18 12:23:40,709 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-18 12:23:40,709 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2018-09-18 12:23:40,710 INFO L87 Difference]: Start difference. First operand 47329 states and 59455 transitions. Second operand 15 states. [2018-09-18 12:24:01,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:24:01,224 INFO L93 Difference]: Finished difference Result 111757 states and 145803 transitions. [2018-09-18 12:24:01,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-18 12:24:01,225 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 454 [2018-09-18 12:24:01,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:24:01,456 INFO L225 Difference]: With dead ends: 111757 [2018-09-18 12:24:01,456 INFO L226 Difference]: Without dead ends: 59642 [2018-09-18 12:24:01,696 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1904 GetRequests, 1837 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=949, Invalid=3607, Unknown=0, NotChecked=0, Total=4556 [2018-09-18 12:24:01,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59642 states. [2018-09-18 12:24:02,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59642 to 58957. [2018-09-18 12:24:02,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58957 states. [2018-09-18 12:24:03,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58957 states to 58957 states and 68918 transitions. [2018-09-18 12:24:03,419 INFO L78 Accepts]: Start accepts. Automaton has 58957 states and 68918 transitions. Word has length 454 [2018-09-18 12:24:03,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:24:03,420 INFO L480 AbstractCegarLoop]: Abstraction has 58957 states and 68918 transitions. [2018-09-18 12:24:03,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-18 12:24:03,420 INFO L276 IsEmpty]: Start isEmpty. Operand 58957 states and 68918 transitions. [2018-09-18 12:24:03,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 561 [2018-09-18 12:24:03,448 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:24:03,448 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, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:24:03,449 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:24:03,450 INFO L82 PathProgramCache]: Analyzing trace with hash 440246335, now seen corresponding path program 1 times [2018-09-18 12:24:03,450 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:24:03,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:24:03,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:24:03,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:24:03,451 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:24:03,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:24:03,898 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 12:24:04,842 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 132 proven. 243 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2018-09-18 12:24:04,843 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:24:04,843 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:24:04,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:24:04,862 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:24:05,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:24:05,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:24:05,400 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2018-09-18 12:24:05,401 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:24:05,797 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2018-09-18 12:24:05,819 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-18 12:24:05,820 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2018-09-18 12:24:05,820 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:24:05,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 12:24:05,821 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 12:24:05,821 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-09-18 12:24:05,821 INFO L87 Difference]: Start difference. First operand 58957 states and 68918 transitions. Second operand 3 states. [2018-09-18 12:24:09,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:24:09,432 INFO L93 Difference]: Finished difference Result 117908 states and 137830 transitions. [2018-09-18 12:24:09,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 12:24:09,433 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 560 [2018-09-18 12:24:09,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:24:09,663 INFO L225 Difference]: With dead ends: 117908 [2018-09-18 12:24:09,664 INFO L226 Difference]: Without dead ends: 58957 [2018-09-18 12:24:09,877 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1132 GetRequests, 1122 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-09-18 12:24:09,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58957 states. [2018-09-18 12:24:11,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58957 to 58957. [2018-09-18 12:24:11,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58957 states. [2018-09-18 12:24:11,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58957 states to 58957 states and 67073 transitions. [2018-09-18 12:24:11,662 INFO L78 Accepts]: Start accepts. Automaton has 58957 states and 67073 transitions. Word has length 560 [2018-09-18 12:24:11,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:24:11,663 INFO L480 AbstractCegarLoop]: Abstraction has 58957 states and 67073 transitions. [2018-09-18 12:24:11,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 12:24:11,663 INFO L276 IsEmpty]: Start isEmpty. Operand 58957 states and 67073 transitions. [2018-09-18 12:24:11,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 656 [2018-09-18 12:24:11,707 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:24:11,707 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, 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, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:24:11,707 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:24:11,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1842865461, now seen corresponding path program 1 times [2018-09-18 12:24:11,708 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:24:11,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:24:11,709 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:24:11,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:24:11,709 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:24:11,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:24:12,256 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 536 proven. 2 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2018-09-18 12:24:12,257 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:24:12,257 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 12:24:12,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:24:12,265 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:24:12,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:24:12,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:24:13,133 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 536 proven. 2 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2018-09-18 12:24:13,134 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:24:13,882 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 536 proven. 2 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2018-09-18 12:24:13,904 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:24:13,904 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 12:24:13,921 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:24:13,922 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:24:14,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:24:14,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:24:15,092 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 536 proven. 2 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2018-09-18 12:24:15,093 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:24:15,467 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 536 proven. 2 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2018-09-18 12:24:15,471 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:24:15,472 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-09-18 12:24:15,472 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:24:15,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 12:24:15,473 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 12:24:15,476 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-18 12:24:15,476 INFO L87 Difference]: Start difference. First operand 58957 states and 67073 transitions. Second operand 9 states. [2018-09-18 12:24:27,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:24:27,273 INFO L93 Difference]: Finished difference Result 132170 states and 159947 transitions. [2018-09-18 12:24:27,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-18 12:24:27,273 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 655 [2018-09-18 12:24:27,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:24:27,677 INFO L225 Difference]: With dead ends: 132170 [2018-09-18 12:24:27,677 INFO L226 Difference]: Without dead ends: 68532 [2018-09-18 12:24:27,955 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2650 GetRequests, 2621 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=172, Invalid=380, Unknown=0, NotChecked=0, Total=552 [2018-09-18 12:24:28,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68532 states. [2018-09-18 12:24:29,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68532 to 68187. [2018-09-18 12:24:29,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68187 states. [2018-09-18 12:24:29,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68187 states to 68187 states and 77912 transitions. [2018-09-18 12:24:29,510 INFO L78 Accepts]: Start accepts. Automaton has 68187 states and 77912 transitions. Word has length 655 [2018-09-18 12:24:29,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:24:29,512 INFO L480 AbstractCegarLoop]: Abstraction has 68187 states and 77912 transitions. [2018-09-18 12:24:29,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-18 12:24:29,512 INFO L276 IsEmpty]: Start isEmpty. Operand 68187 states and 77912 transitions. [2018-09-18 12:24:29,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 723 [2018-09-18 12:24:29,553 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:24:29,554 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:24:29,554 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:24:29,555 INFO L82 PathProgramCache]: Analyzing trace with hash -578940980, now seen corresponding path program 1 times [2018-09-18 12:24:29,555 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:24:29,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:24:29,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:24:29,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:24:29,556 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:24:29,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:24:30,709 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2018-09-18 12:24:30,709 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 12:24:30,709 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-18 12:24:30,709 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:24:30,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-18 12:24:30,710 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-18 12:24:30,710 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 12:24:30,711 INFO L87 Difference]: Start difference. First operand 68187 states and 77912 transitions. Second operand 4 states. [2018-09-18 12:24:36,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:24:36,549 INFO L93 Difference]: Finished difference Result 138761 states and 157038 transitions. [2018-09-18 12:24:36,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-18 12:24:36,550 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 722 [2018-09-18 12:24:36,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:24:36,715 INFO L225 Difference]: With dead ends: 138761 [2018-09-18 12:24:36,716 INFO L226 Difference]: Without dead ends: 69864 [2018-09-18 12:24:36,881 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 12:24:36,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69864 states. [2018-09-18 12:24:37,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69864 to 68957. [2018-09-18 12:24:37,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68957 states. [2018-09-18 12:24:38,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68957 states to 68957 states and 74693 transitions. [2018-09-18 12:24:38,037 INFO L78 Accepts]: Start accepts. Automaton has 68957 states and 74693 transitions. Word has length 722 [2018-09-18 12:24:38,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:24:38,039 INFO L480 AbstractCegarLoop]: Abstraction has 68957 states and 74693 transitions. [2018-09-18 12:24:38,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-18 12:24:38,039 INFO L276 IsEmpty]: Start isEmpty. Operand 68957 states and 74693 transitions. [2018-09-18 12:24:38,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 872 [2018-09-18 12:24:38,461 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:24:38,462 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, 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, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:24:38,462 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:24:38,463 INFO L82 PathProgramCache]: Analyzing trace with hash 73286151, now seen corresponding path program 1 times [2018-09-18 12:24:38,463 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:24:38,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:24:38,464 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:24:38,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:24:38,464 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:24:38,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:24:39,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1052 backedges. 672 proven. 2 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2018-09-18 12:24:39,261 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:24:39,261 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 12:24:39,269 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:24:39,270 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:24:39,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:24:39,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:24:39,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1052 backedges. 672 proven. 2 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2018-09-18 12:24:39,895 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:24:40,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1052 backedges. 672 proven. 2 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2018-09-18 12:24:40,784 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:24:40,784 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 12:24:40,800 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:24:40,800 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:24:41,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:24:41,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:24:41,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1052 backedges. 672 proven. 2 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2018-09-18 12:24:41,613 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:24:42,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1052 backedges. 672 proven. 2 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2018-09-18 12:24:42,267 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:24:42,268 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-09-18 12:24:42,268 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:24:42,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 12:24:42,270 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 12:24:42,270 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-18 12:24:42,270 INFO L87 Difference]: Start difference. First operand 68957 states and 74693 transitions. Second operand 9 states. [2018-09-18 12:24:52,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:24:52,440 INFO L93 Difference]: Finished difference Result 152403 states and 169602 transitions. [2018-09-18 12:24:52,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-18 12:24:52,445 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 871 [2018-09-18 12:24:52,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:24:52,723 INFO L225 Difference]: With dead ends: 152403 [2018-09-18 12:24:52,723 INFO L226 Difference]: Without dead ends: 75240 [2018-09-18 12:24:52,916 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3511 GetRequests, 3483 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2018-09-18 12:24:52,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75240 states. [2018-09-18 12:24:54,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75240 to 74918. [2018-09-18 12:24:54,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74918 states. [2018-09-18 12:24:54,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74918 states to 74918 states and 82191 transitions. [2018-09-18 12:24:54,211 INFO L78 Accepts]: Start accepts. Automaton has 74918 states and 82191 transitions. Word has length 871 [2018-09-18 12:24:54,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:24:54,211 INFO L480 AbstractCegarLoop]: Abstraction has 74918 states and 82191 transitions. [2018-09-18 12:24:54,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-18 12:24:54,212 INFO L276 IsEmpty]: Start isEmpty. Operand 74918 states and 82191 transitions. [2018-09-18 12:24:54,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 874 [2018-09-18 12:24:54,243 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:24:54,244 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:24:54,244 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:24:54,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1127494275, now seen corresponding path program 1 times [2018-09-18 12:24:54,245 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:24:54,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:24:54,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:24:54,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:24:54,246 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:24:54,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:24:54,550 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 12:24:55,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 256 proven. 354 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2018-09-18 12:24:55,204 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:24:55,205 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 12:24:55,213 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:24:55,213 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:24:55,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:24:55,423 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:24:56,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 424 proven. 0 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2018-09-18 12:24:56,101 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:24:57,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 256 proven. 255 refuted. 0 times theorem prover too weak. 543 trivial. 0 not checked. [2018-09-18 12:24:57,260 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 12:24:57,260 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 3] total 9 [2018-09-18 12:24:57,260 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:24:57,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 12:24:57,261 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 12:24:57,262 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-09-18 12:24:57,262 INFO L87 Difference]: Start difference. First operand 74918 states and 82191 transitions. Second operand 3 states. [2018-09-18 12:25:00,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:25:00,399 INFO L93 Difference]: Finished difference Result 151966 states and 166744 transitions. [2018-09-18 12:25:00,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 12:25:00,400 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 873 [2018-09-18 12:25:00,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:25:00,592 INFO L225 Difference]: With dead ends: 151966 [2018-09-18 12:25:00,593 INFO L226 Difference]: Without dead ends: 74939 [2018-09-18 12:25:00,759 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1753 GetRequests, 1745 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-09-18 12:25:00,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74939 states. [2018-09-18 12:25:01,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74939 to 74939. [2018-09-18 12:25:01,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74939 states. [2018-09-18 12:25:02,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74939 states to 74939 states and 82087 transitions. [2018-09-18 12:25:02,180 INFO L78 Accepts]: Start accepts. Automaton has 74939 states and 82087 transitions. Word has length 873 [2018-09-18 12:25:02,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:25:02,180 INFO L480 AbstractCegarLoop]: Abstraction has 74939 states and 82087 transitions. [2018-09-18 12:25:02,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 12:25:02,181 INFO L276 IsEmpty]: Start isEmpty. Operand 74939 states and 82087 transitions. [2018-09-18 12:25:02,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 873 [2018-09-18 12:25:02,607 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:25:02,608 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, 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, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:25:02,608 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:25:02,609 INFO L82 PathProgramCache]: Analyzing trace with hash -6908196, now seen corresponding path program 1 times [2018-09-18 12:25:02,609 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:25:02,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:25:02,610 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:25:02,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:25:02,611 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:25:02,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:25:03,719 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-18 12:25:04,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 608 proven. 67 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2018-09-18 12:25:04,673 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:25:04,674 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:25:04,681 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:25:04,682 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:25:04,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:25:04,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:25:06,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 430 proven. 0 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2018-09-18 12:25:06,034 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:25:07,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 256 proven. 354 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2018-09-18 12:25:07,782 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 12:25:07,782 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 5] total 16 [2018-09-18 12:25:07,783 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:25:07,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 12:25:07,784 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 12:25:07,784 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2018-09-18 12:25:07,784 INFO L87 Difference]: Start difference. First operand 74939 states and 82087 transitions. Second operand 5 states. [2018-09-18 12:25:13,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:25:13,259 INFO L93 Difference]: Finished difference Result 152656 states and 164518 transitions. [2018-09-18 12:25:13,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-18 12:25:13,262 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 872 [2018-09-18 12:25:13,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:25:13,454 INFO L225 Difference]: With dead ends: 152656 [2018-09-18 12:25:13,454 INFO L226 Difference]: Without dead ends: 78412 [2018-09-18 12:25:13,602 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1760 GetRequests, 1739 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2018-09-18 12:25:13,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78412 states. [2018-09-18 12:25:14,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78412 to 74158. [2018-09-18 12:25:14,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74158 states. [2018-09-18 12:25:14,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74158 states to 74158 states and 78728 transitions. [2018-09-18 12:25:14,621 INFO L78 Accepts]: Start accepts. Automaton has 74158 states and 78728 transitions. Word has length 872 [2018-09-18 12:25:14,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:25:14,622 INFO L480 AbstractCegarLoop]: Abstraction has 74158 states and 78728 transitions. [2018-09-18 12:25:14,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 12:25:14,622 INFO L276 IsEmpty]: Start isEmpty. Operand 74158 states and 78728 transitions. [2018-09-18 12:25:14,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 982 [2018-09-18 12:25:14,670 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:25:14,671 INFO L376 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:25:14,671 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:25:14,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1217098878, now seen corresponding path program 1 times [2018-09-18 12:25:14,672 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:25:14,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:25:14,673 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:25:14,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:25:14,673 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:25:14,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:25:16,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2297 backedges. 802 proven. 567 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2018-09-18 12:25:16,698 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:25:16,699 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 12:25:16,708 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:25:16,708 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:25:16,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:25:16,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:25:17,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2297 backedges. 1561 proven. 2 refuted. 0 times theorem prover too weak. 734 trivial. 0 not checked. [2018-09-18 12:25:17,598 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:25:18,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2297 backedges. 793 proven. 146 refuted. 0 times theorem prover too weak. 1358 trivial. 0 not checked. [2018-09-18 12:25:18,091 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:25:18,091 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 15 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 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 12:25:18,108 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:25:18,109 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:25:18,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:25:18,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:25:19,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2297 backedges. 1561 proven. 2 refuted. 0 times theorem prover too weak. 734 trivial. 0 not checked. [2018-09-18 12:25:19,479 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:25:19,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2297 backedges. 793 proven. 146 refuted. 0 times theorem prover too weak. 1358 trivial. 0 not checked. [2018-09-18 12:25:19,974 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:25:19,975 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5, 5, 5] total 21 [2018-09-18 12:25:19,975 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:25:19,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-18 12:25:19,977 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-18 12:25:19,977 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2018-09-18 12:25:19,977 INFO L87 Difference]: Start difference. First operand 74158 states and 78728 transitions. Second operand 20 states. [2018-09-18 12:25:38,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:25:38,041 INFO L93 Difference]: Finished difference Result 145694 states and 153528 transitions. [2018-09-18 12:25:38,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-18 12:25:38,041 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 981 [2018-09-18 12:25:38,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:25:38,174 INFO L225 Difference]: With dead ends: 145694 [2018-09-18 12:25:38,174 INFO L226 Difference]: Without dead ends: 75065 [2018-09-18 12:25:38,260 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4011 GetRequests, 3950 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=791, Invalid=2631, Unknown=0, NotChecked=0, Total=3422 [2018-09-18 12:25:38,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75065 states. [2018-09-18 12:25:39,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75065 to 69392. [2018-09-18 12:25:39,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69392 states. [2018-09-18 12:25:39,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69392 states to 69392 states and 71795 transitions. [2018-09-18 12:25:39,146 INFO L78 Accepts]: Start accepts. Automaton has 69392 states and 71795 transitions. Word has length 981 [2018-09-18 12:25:39,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:25:39,147 INFO L480 AbstractCegarLoop]: Abstraction has 69392 states and 71795 transitions. [2018-09-18 12:25:39,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-18 12:25:39,147 INFO L276 IsEmpty]: Start isEmpty. Operand 69392 states and 71795 transitions. [2018-09-18 12:25:39,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1001 [2018-09-18 12:25:39,173 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:25:39,174 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 12:25:39,174 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:25:39,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1892340537, now seen corresponding path program 1 times [2018-09-18 12:25:39,175 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:25:39,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:25:39,176 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:25:39,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:25:39,176 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:25:39,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:25:39,777 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 12:25:41,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1579 backedges. 298 proven. 1044 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2018-09-18 12:25:41,500 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:25:41,500 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:25:41,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:25:41,509 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:25:41,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:25:41,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:25:42,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1579 backedges. 681 proven. 0 refuted. 0 times theorem prover too weak. 898 trivial. 0 not checked. [2018-09-18 12:25:42,480 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:25:43,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1579 backedges. 320 proven. 601 refuted. 0 times theorem prover too weak. 658 trivial. 0 not checked. [2018-09-18 12:25:43,624 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 12:25:43,624 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [16, 6] total 21 [2018-09-18 12:25:43,624 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:25:43,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 12:25:43,625 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 12:25:43,625 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2018-09-18 12:25:43,626 INFO L87 Difference]: Start difference. First operand 69392 states and 71795 transitions. Second operand 5 states. [2018-09-18 12:25:48,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:25:48,577 INFO L93 Difference]: Finished difference Result 138394 states and 143216 transitions. [2018-09-18 12:25:48,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-18 12:25:48,577 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1000 [2018-09-18 12:25:48,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:25:48,678 INFO L225 Difference]: With dead ends: 138394 [2018-09-18 12:25:48,678 INFO L226 Difference]: Without dead ends: 69719 [2018-09-18 12:25:48,729 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2026 GetRequests, 1996 SyntacticMatches, 8 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2018-09-18 12:25:48,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69719 states. [2018-09-18 12:25:49,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69719 to 69422. [2018-09-18 12:25:49,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69422 states. [2018-09-18 12:25:49,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69422 states to 69422 states and 71661 transitions. [2018-09-18 12:25:49,375 INFO L78 Accepts]: Start accepts. Automaton has 69422 states and 71661 transitions. Word has length 1000 [2018-09-18 12:25:49,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:25:49,376 INFO L480 AbstractCegarLoop]: Abstraction has 69422 states and 71661 transitions. [2018-09-18 12:25:49,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 12:25:49,376 INFO L276 IsEmpty]: Start isEmpty. Operand 69422 states and 71661 transitions. [2018-09-18 12:25:49,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1529 [2018-09-18 12:25:49,408 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:25:49,409 INFO L376 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:25:49,409 INFO L423 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:25:49,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1002760450, now seen corresponding path program 1 times [2018-09-18 12:25:49,410 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:25:49,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:25:49,412 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:25:49,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:25:49,412 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:25:49,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:25:50,924 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 Received shutdown request... [2018-09-18 12:25:53,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2572 backedges. 384 proven. 1555 refuted. 0 times theorem prover too weak. 633 trivial. 0 not checked. [2018-09-18 12:25:53,941 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:25:53,941 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:25:53,948 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:25:53,949 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:25:54,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:25:54,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:25:54,345 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-18 12:25:54,547 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:25:54,547 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-18 12:25:54,554 WARN L206 ceAbstractionStarter]: Timeout [2018-09-18 12:25:54,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.09 12:25:54 BoogieIcfgContainer [2018-09-18 12:25:54,554 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-18 12:25:54,556 INFO L168 Benchmark]: Toolchain (without parser) took 218126.36 ms. Allocated memory was 1.5 GB in the beginning and 3.9 GB in the end (delta: 2.4 GB). Free memory was 1.4 GB in the beginning and 817.3 MB in the end (delta: 574.6 MB). Peak memory consumption was 3.0 GB. Max. memory is 7.1 GB. [2018-09-18 12:25:54,557 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-18 12:25:54,558 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1763.97 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 179.7 MB). Peak memory consumption was 179.7 MB. Max. memory is 7.1 GB. [2018-09-18 12:25:54,559 INFO L168 Benchmark]: Boogie Procedure Inliner took 179.88 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-18 12:25:54,561 INFO L168 Benchmark]: Boogie Preprocessor took 609.52 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 846.2 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -1.1 GB). Peak memory consumption was 85.6 MB. Max. memory is 7.1 GB. [2018-09-18 12:25:54,562 INFO L168 Benchmark]: RCFGBuilder took 8051.47 ms. Allocated memory is still 2.4 GB. Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 487.2 MB). Peak memory consumption was 487.2 MB. Max. memory is 7.1 GB. [2018-09-18 12:25:54,563 INFO L168 Benchmark]: TraceAbstraction took 207513.42 ms. Allocated memory was 2.4 GB in the beginning and 3.9 GB in the end (delta: 1.6 GB). Free memory was 1.8 GB in the beginning and 817.3 MB in the end (delta: 942.5 MB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. [2018-09-18 12:25:54,571 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1763.97 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 179.7 MB). Peak memory consumption was 179.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 179.88 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 609.52 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 846.2 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -1.1 GB). Peak memory consumption was 85.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 8051.47 ms. Allocated memory is still 2.4 GB. Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 487.2 MB). Peak memory consumption was 487.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 207513.42 ms. Allocated memory was 2.4 GB in the beginning and 3.9 GB in the end (delta: 1.6 GB). Free memory was 1.8 GB in the beginning and 817.3 MB in the end (delta: 942.5 MB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 201]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 201). Cancelled while BasicCegarLoop was analyzing trace of length 1529 with TraceHistMax 7, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 16 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 775 locations, 1 error locations. TIMEOUT Result, 207.4s OverallTime, 16 OverallIterations, 8 TraceHistogramMax, 145.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 5538 SDtfs, 52572 SDslu, 3064 SDs, 0 SdLazy, 96376 SolverSat, 19525 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 104.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20757 GetRequests, 20445 SyntacticMatches, 38 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2793 ImplicationChecksByTransitivity, 17.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=74939occurred 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: 14.6s AutomataMinimizationTime, 15 MinimizatonAttempts, 13544 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 3.7s SatisfiabilityAnalysisTime, 29.6s InterpolantComputationTime, 18403 NumberOfCodeBlocks, 18403 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 28556 ConstructedInterpolants, 0 QuantifiedInterpolants, 55470119 SizeOfPredicates, 11 NumberOfNonLiveVariables, 14439 ConjunctsInSsa, 96 ConjunctsInUnsatCore, 45 InterpolantComputations, 12 PerfectInterpolantSequences, 35695/39690 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/Problem18_label28_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-18_12-25-54-596.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem18_label28_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-18_12-25-54-596.csv Completed graceful shutdown