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/Problem10_label56_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-69f5bdd-m [2018-09-18 11:19:16,345 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-18 11:19:16,347 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-18 11:19:16,360 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-18 11:19:16,361 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-18 11:19:16,362 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-18 11:19:16,363 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-18 11:19:16,365 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-18 11:19:16,367 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-18 11:19:16,367 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-18 11:19:16,368 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-18 11:19:16,369 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-18 11:19:16,370 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-18 11:19:16,371 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-18 11:19:16,372 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-18 11:19:16,373 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-18 11:19:16,374 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-18 11:19:16,375 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-18 11:19:16,377 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-18 11:19:16,379 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-18 11:19:16,380 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-18 11:19:16,381 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-18 11:19:16,386 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-18 11:19:16,401 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-18 11:19:16,434 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-18 11:19:16,434 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-18 11:19:16,435 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-18 11:19:16,437 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-18 11:19:16,438 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-18 11:19:16,438 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-18 11:19:16,438 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-18 11:19:16,438 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-18 11:19:16,439 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-18 11:19:16,439 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-18 11:19:16,439 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-09-18 11:19:16,439 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-18 11:19:16,440 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-18 11:19:16,440 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-18 11:19:16,441 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-18 11:19:16,442 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-18 11:19:16,442 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-18 11:19:16,442 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-18 11:19:16,442 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-18 11:19:16,442 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-18 11:19:16,443 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-18 11:19:16,443 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-18 11:19:16,443 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-18 11:19:16,443 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-18 11:19:16,443 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-18 11:19:16,444 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-18 11:19:16,444 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-18 11:19:16,444 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-18 11:19:16,444 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-18 11:19:16,444 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-18 11:19:16,445 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-18 11:19:16,445 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-18 11:19:16,445 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-18 11:19:16,445 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-18 11:19:16,497 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-18 11:19:16,510 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-18 11:19:16,514 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-18 11:19:16,516 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-18 11:19:16,516 INFO L276 PluginConnector]: CDTParser initialized [2018-09-18 11:19:16,517 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label56_true-unreach-call.c [2018-09-18 11:19:16,864 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95a49e7cf/81ce3ca9efd047fe97431696fde24f13/FLAGb9e7d9409 [2018-09-18 11:19:17,156 INFO L277 CDTParser]: Found 1 translation units. [2018-09-18 11:19:17,157 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label56_true-unreach-call.c [2018-09-18 11:19:17,171 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95a49e7cf/81ce3ca9efd047fe97431696fde24f13/FLAGb9e7d9409 [2018-09-18 11:19:17,191 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95a49e7cf/81ce3ca9efd047fe97431696fde24f13 [2018-09-18 11:19:17,205 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-18 11:19:17,211 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-18 11:19:17,212 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-18 11:19:17,213 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-18 11:19:17,219 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-18 11:19:17,221 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 11:19:17" (1/1) ... [2018-09-18 11:19:17,224 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@181c80c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:19:17, skipping insertion in model container [2018-09-18 11:19:17,225 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 11:19:17" (1/1) ... [2018-09-18 11:19:17,238 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-18 11:19:17,835 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 11:19:17,854 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-18 11:19:18,000 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 11:19:18,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:19:18 WrapperNode [2018-09-18 11:19:18,056 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-18 11:19:18,057 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-18 11:19:18,057 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-18 11:19:18,057 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-18 11:19:18,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:19:18" (1/1) ... [2018-09-18 11:19:18,096 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:19:18" (1/1) ... [2018-09-18 11:19:18,190 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-18 11:19:18,190 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-18 11:19:18,190 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-18 11:19:18,190 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-18 11:19:18,346 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:19:18" (1/1) ... [2018-09-18 11:19:18,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:19:18" (1/1) ... [2018-09-18 11:19:18,354 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:19:18" (1/1) ... [2018-09-18 11:19:18,355 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:19:18" (1/1) ... [2018-09-18 11:19:18,399 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:19:18" (1/1) ... [2018-09-18 11:19:18,419 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:19:18" (1/1) ... [2018-09-18 11:19:18,430 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:19:18" (1/1) ... [2018-09-18 11:19:18,445 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-18 11:19:18,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-18 11:19:18,446 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-18 11:19:18,446 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-18 11:19:18,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:19:18" (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 11:19:18,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-18 11:19:18,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-18 11:19:18,508 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-18 11:19:18,508 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-18 11:19:18,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-18 11:19:18,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-18 11:19:18,509 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-18 11:19:18,509 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-18 11:19:21,798 INFO L356 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-18 11:19:21,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 11:19:21 BoogieIcfgContainer [2018-09-18 11:19:21,799 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-18 11:19:21,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-18 11:19:21,801 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-18 11:19:21,804 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-18 11:19:21,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 11:19:17" (1/3) ... [2018-09-18 11:19:21,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6294ecf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 11:19:21, skipping insertion in model container [2018-09-18 11:19:21,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:19:18" (2/3) ... [2018-09-18 11:19:21,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6294ecf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 11:19:21, skipping insertion in model container [2018-09-18 11:19:21,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 11:19:21" (3/3) ... [2018-09-18 11:19:21,808 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem10_label56_true-unreach-call.c [2018-09-18 11:19:21,818 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-18 11:19:21,826 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-18 11:19:21,877 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-18 11:19:21,877 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-18 11:19:21,878 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-18 11:19:21,878 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-18 11:19:21,878 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-18 11:19:21,878 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-18 11:19:21,878 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-18 11:19:21,879 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-18 11:19:21,879 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-18 11:19:21,904 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states. [2018-09-18 11:19:21,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-18 11:19:21,913 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:19:21,914 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] [2018-09-18 11:19:21,915 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:19:21,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1189398212, now seen corresponding path program 1 times [2018-09-18 11:19:21,924 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:19:21,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:19:21,976 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:19:21,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:19:21,977 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:19:22,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:19:22,355 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 11:19:22,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:19:22,439 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 11:19:22,440 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-18 11:19:22,440 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:19:22,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 11:19:22,458 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 11:19:22,459 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 11:19:22,461 INFO L87 Difference]: Start difference. First operand 216 states. Second operand 3 states. [2018-09-18 11:19:23,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:19:23,995 INFO L93 Difference]: Finished difference Result 574 states and 992 transitions. [2018-09-18 11:19:23,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 11:19:23,999 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2018-09-18 11:19:23,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:19:24,019 INFO L225 Difference]: With dead ends: 574 [2018-09-18 11:19:24,019 INFO L226 Difference]: Without dead ends: 356 [2018-09-18 11:19:24,027 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 11:19:24,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2018-09-18 11:19:24,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 356. [2018-09-18 11:19:24,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2018-09-18 11:19:24,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 607 transitions. [2018-09-18 11:19:24,107 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 607 transitions. Word has length 30 [2018-09-18 11:19:24,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:19:24,108 INFO L480 AbstractCegarLoop]: Abstraction has 356 states and 607 transitions. [2018-09-18 11:19:24,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 11:19:24,108 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 607 transitions. [2018-09-18 11:19:24,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-18 11:19:24,117 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:19:24,117 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:19:24,118 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:19:24,118 INFO L82 PathProgramCache]: Analyzing trace with hash 536301288, now seen corresponding path program 1 times [2018-09-18 11:19:24,118 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:19:24,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:19:24,120 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:19:24,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:19:24,120 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:19:24,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:19:24,513 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-18 11:19:24,513 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:19:24,513 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:19:24,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:19:24,532 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:19:24,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:19:24,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:19:24,719 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:19:24,719 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:19:25,052 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:19:25,091 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-18 11:19:25,091 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2018-09-18 11:19:25,091 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:19:25,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 11:19:25,093 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 11:19:25,094 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-09-18 11:19:25,094 INFO L87 Difference]: Start difference. First operand 356 states and 607 transitions. Second operand 3 states. [2018-09-18 11:19:27,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:19:27,017 INFO L93 Difference]: Finished difference Result 994 states and 1764 transitions. [2018-09-18 11:19:27,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 11:19:27,019 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 118 [2018-09-18 11:19:27,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:19:27,029 INFO L225 Difference]: With dead ends: 994 [2018-09-18 11:19:27,030 INFO L226 Difference]: Without dead ends: 644 [2018-09-18 11:19:27,034 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 234 SyntacticMatches, 5 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-09-18 11:19:27,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2018-09-18 11:19:27,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 644. [2018-09-18 11:19:27,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 644 states. [2018-09-18 11:19:27,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1047 transitions. [2018-09-18 11:19:27,085 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1047 transitions. Word has length 118 [2018-09-18 11:19:27,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:19:27,086 INFO L480 AbstractCegarLoop]: Abstraction has 644 states and 1047 transitions. [2018-09-18 11:19:27,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 11:19:27,087 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1047 transitions. [2018-09-18 11:19:27,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-18 11:19:27,092 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:19:27,092 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:19:27,093 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:19:27,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1448349764, now seen corresponding path program 1 times [2018-09-18 11:19:27,093 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:19:27,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:19:27,095 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:19:27,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:19:27,095 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:19:27,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:19:27,393 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:19:27,393 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 11:19:27,394 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-18 11:19:27,394 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:19:27,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 11:19:27,395 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 11:19:27,395 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-18 11:19:27,396 INFO L87 Difference]: Start difference. First operand 644 states and 1047 transitions. Second operand 5 states. [2018-09-18 11:19:30,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:19:30,962 INFO L93 Difference]: Finished difference Result 2182 states and 3740 transitions. [2018-09-18 11:19:30,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-18 11:19:30,964 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 156 [2018-09-18 11:19:30,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:19:30,979 INFO L225 Difference]: With dead ends: 2182 [2018-09-18 11:19:30,979 INFO L226 Difference]: Without dead ends: 1544 [2018-09-18 11:19:30,985 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-09-18 11:19:30,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2018-09-18 11:19:31,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 1529. [2018-09-18 11:19:31,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1529 states. [2018-09-18 11:19:31,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 2420 transitions. [2018-09-18 11:19:31,066 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 2420 transitions. Word has length 156 [2018-09-18 11:19:31,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:19:31,067 INFO L480 AbstractCegarLoop]: Abstraction has 1529 states and 2420 transitions. [2018-09-18 11:19:31,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 11:19:31,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 2420 transitions. [2018-09-18 11:19:31,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-09-18 11:19:31,080 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:19:31,081 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 11:19:31,081 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:19:31,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1458845129, now seen corresponding path program 1 times [2018-09-18 11:19:31,082 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:19:31,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:19:31,083 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:19:31,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:19:31,083 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:19:31,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:19:31,404 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 11:19:31,846 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 46 proven. 86 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 11:19:31,847 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:19:31,847 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:19:31,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:19:31,863 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:19:31,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:19:31,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:19:32,085 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-09-18 11:19:32,086 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:19:32,294 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 46 proven. 86 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 11:19:32,316 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 11:19:32,316 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2018-09-18 11:19:32,316 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:19:32,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 11:19:32,318 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 11:19:32,318 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-09-18 11:19:32,318 INFO L87 Difference]: Start difference. First operand 1529 states and 2420 transitions. Second operand 5 states. [2018-09-18 11:19:33,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:19:33,874 INFO L93 Difference]: Finished difference Result 3414 states and 5577 transitions. [2018-09-18 11:19:33,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 11:19:33,875 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 217 [2018-09-18 11:19:33,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:19:33,890 INFO L225 Difference]: With dead ends: 3414 [2018-09-18 11:19:33,890 INFO L226 Difference]: Without dead ends: 1891 [2018-09-18 11:19:33,897 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 428 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2018-09-18 11:19:33,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2018-09-18 11:19:33,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1846. [2018-09-18 11:19:33,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1846 states. [2018-09-18 11:19:33,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1846 states to 1846 states and 2689 transitions. [2018-09-18 11:19:33,961 INFO L78 Accepts]: Start accepts. Automaton has 1846 states and 2689 transitions. Word has length 217 [2018-09-18 11:19:33,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:19:33,961 INFO L480 AbstractCegarLoop]: Abstraction has 1846 states and 2689 transitions. [2018-09-18 11:19:33,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 11:19:33,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1846 states and 2689 transitions. [2018-09-18 11:19:33,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-18 11:19:33,968 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:19:33,969 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 11:19:33,969 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:19:33,969 INFO L82 PathProgramCache]: Analyzing trace with hash -714678896, now seen corresponding path program 1 times [2018-09-18 11:19:33,969 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:19:33,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:19:33,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:19:33,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:19:33,971 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:19:34,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:19:34,208 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2018-09-18 11:19:34,208 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 11:19:34,208 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-18 11:19:34,208 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:19:34,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-18 11:19:34,209 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-18 11:19:34,209 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 11:19:34,209 INFO L87 Difference]: Start difference. First operand 1846 states and 2689 transitions. Second operand 4 states. [2018-09-18 11:19:35,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:19:35,836 INFO L93 Difference]: Finished difference Result 5403 states and 8355 transitions. [2018-09-18 11:19:35,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-18 11:19:35,837 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 218 [2018-09-18 11:19:35,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:19:35,862 INFO L225 Difference]: With dead ends: 5403 [2018-09-18 11:19:35,862 INFO L226 Difference]: Without dead ends: 3563 [2018-09-18 11:19:35,876 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 11:19:35,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3563 states. [2018-09-18 11:19:35,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3563 to 3548. [2018-09-18 11:19:35,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3548 states. [2018-09-18 11:19:35,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3548 states to 3548 states and 5127 transitions. [2018-09-18 11:19:36,000 INFO L78 Accepts]: Start accepts. Automaton has 3548 states and 5127 transitions. Word has length 218 [2018-09-18 11:19:36,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:19:36,001 INFO L480 AbstractCegarLoop]: Abstraction has 3548 states and 5127 transitions. [2018-09-18 11:19:36,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-18 11:19:36,001 INFO L276 IsEmpty]: Start isEmpty. Operand 3548 states and 5127 transitions. [2018-09-18 11:19:36,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2018-09-18 11:19:36,016 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:19:36,016 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 11:19:36,017 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:19:36,017 INFO L82 PathProgramCache]: Analyzing trace with hash 59503363, now seen corresponding path program 1 times [2018-09-18 11:19:36,017 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:19:36,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:19:36,018 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:19:36,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:19:36,018 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:19:36,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:19:36,335 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 11:19:36,393 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 46 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 11:19:36,393 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:19:36,393 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:19:36,402 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:19:36,402 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:19:36,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:19:36,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:19:36,605 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-09-18 11:19:36,606 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:19:36,878 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 46 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 11:19:36,912 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 11:19:36,912 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-18 11:19:36,912 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:19:36,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 11:19:36,913 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 11:19:36,913 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-18 11:19:36,914 INFO L87 Difference]: Start difference. First operand 3548 states and 5127 transitions. Second operand 5 states. [2018-09-18 11:19:39,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:19:39,986 INFO L93 Difference]: Finished difference Result 9937 states and 15074 transitions. [2018-09-18 11:19:39,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-18 11:19:39,986 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 247 [2018-09-18 11:19:39,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:19:40,023 INFO L225 Difference]: With dead ends: 9937 [2018-09-18 11:19:40,023 INFO L226 Difference]: Without dead ends: 6395 [2018-09-18 11:19:40,050 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 489 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-09-18 11:19:40,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6395 states. [2018-09-18 11:19:40,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6395 to 6327. [2018-09-18 11:19:40,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6327 states. [2018-09-18 11:19:40,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6327 states to 6327 states and 8818 transitions. [2018-09-18 11:19:40,226 INFO L78 Accepts]: Start accepts. Automaton has 6327 states and 8818 transitions. Word has length 247 [2018-09-18 11:19:40,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:19:40,226 INFO L480 AbstractCegarLoop]: Abstraction has 6327 states and 8818 transitions. [2018-09-18 11:19:40,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 11:19:40,227 INFO L276 IsEmpty]: Start isEmpty. Operand 6327 states and 8818 transitions. [2018-09-18 11:19:40,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-09-18 11:19:40,243 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:19:40,244 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 11:19:40,244 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:19:40,244 INFO L82 PathProgramCache]: Analyzing trace with hash -266725808, now seen corresponding path program 1 times [2018-09-18 11:19:40,244 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:19:40,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:19:40,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:19:40,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:19:40,247 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:19:40,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:19:40,569 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 11:19:40,752 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 47 proven. 6 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-09-18 11:19:40,752 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:19:40,752 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:19:40,761 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:19:40,761 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:19:40,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:19:40,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:19:41,052 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 124 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:19:41,052 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:19:41,474 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 124 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:19:41,495 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:19:41,496 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 11:19:41,513 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:19:41,513 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:19:41,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:19:41,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:19:41,743 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 124 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:19:41,744 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:19:41,982 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 124 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:19:41,984 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:19:41,984 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5, 5, 5] total 13 [2018-09-18 11:19:41,984 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:19:41,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-18 11:19:41,985 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-18 11:19:41,985 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2018-09-18 11:19:41,986 INFO L87 Difference]: Start difference. First operand 6327 states and 8818 transitions. Second operand 11 states. [2018-09-18 11:19:45,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:19:45,428 INFO L93 Difference]: Finished difference Result 16379 states and 23485 transitions. [2018-09-18 11:19:45,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-18 11:19:45,432 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 252 [2018-09-18 11:19:45,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:19:45,448 INFO L225 Difference]: With dead ends: 16379 [2018-09-18 11:19:45,448 INFO L226 Difference]: Without dead ends: 3369 [2018-09-18 11:19:45,538 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1039 GetRequests, 1008 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=176, Invalid=474, Unknown=0, NotChecked=0, Total=650 [2018-09-18 11:19:45,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3369 states. [2018-09-18 11:19:45,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3369 to 2664. [2018-09-18 11:19:45,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2664 states. [2018-09-18 11:19:45,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2664 states to 2664 states and 3168 transitions. [2018-09-18 11:19:45,617 INFO L78 Accepts]: Start accepts. Automaton has 2664 states and 3168 transitions. Word has length 252 [2018-09-18 11:19:45,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:19:45,617 INFO L480 AbstractCegarLoop]: Abstraction has 2664 states and 3168 transitions. [2018-09-18 11:19:45,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-18 11:19:45,618 INFO L276 IsEmpty]: Start isEmpty. Operand 2664 states and 3168 transitions. [2018-09-18 11:19:45,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2018-09-18 11:19:45,629 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:19:45,629 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 11:19:45,630 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:19:45,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1112971575, now seen corresponding path program 1 times [2018-09-18 11:19:45,630 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:19:45,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:19:45,631 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:19:45,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:19:45,631 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:19:45,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:19:46,206 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 141 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:19:46,207 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:19:46,207 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 11:19:46,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:19:46,223 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:19:46,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:19:46,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:19:46,738 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 141 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:19:46,739 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:19:47,029 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 141 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:19:47,050 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:19:47,050 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 8 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 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:19:47,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:19:47,066 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:19:47,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:19:47,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:19:47,521 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 141 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:19:47,521 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:19:48,364 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 141 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:19:48,367 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:19:48,368 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-09-18 11:19:48,368 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:19:48,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 11:19:48,369 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 11:19:48,369 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-09-18 11:19:48,370 INFO L87 Difference]: Start difference. First operand 2664 states and 3168 transitions. Second operand 9 states. [2018-09-18 11:19:53,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:19:53,274 INFO L93 Difference]: Finished difference Result 6948 states and 8607 transitions. [2018-09-18 11:19:53,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-18 11:19:53,275 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 269 [2018-09-18 11:19:53,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:19:53,294 INFO L225 Difference]: With dead ends: 6948 [2018-09-18 11:19:53,294 INFO L226 Difference]: Without dead ends: 4290 [2018-09-18 11:19:53,300 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1099 GetRequests, 1073 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2018-09-18 11:19:53,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4290 states. [2018-09-18 11:19:53,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4290 to 3940. [2018-09-18 11:19:53,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3940 states. [2018-09-18 11:19:53,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3940 states to 3940 states and 4673 transitions. [2018-09-18 11:19:53,426 INFO L78 Accepts]: Start accepts. Automaton has 3940 states and 4673 transitions. Word has length 269 [2018-09-18 11:19:53,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:19:53,426 INFO L480 AbstractCegarLoop]: Abstraction has 3940 states and 4673 transitions. [2018-09-18 11:19:53,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-18 11:19:53,427 INFO L276 IsEmpty]: Start isEmpty. Operand 3940 states and 4673 transitions. [2018-09-18 11:19:53,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2018-09-18 11:19:53,443 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:19:53,444 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 11:19:53,444 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:19:53,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1270182200, now seen corresponding path program 1 times [2018-09-18 11:19:53,446 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:19:53,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:19:53,447 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:19:53,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:19:53,447 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:19:53,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:19:54,009 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 5 proven. 48 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-09-18 11:19:54,010 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:19:54,010 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:19:54,017 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:19:54,018 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:19:54,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:19:54,103 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:19:54,268 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 20 [2018-09-18 11:19:54,797 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 5 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:19:54,797 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:19:58,876 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 1670