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/Problem03_label51_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-69f5bdd-m [2018-09-18 10:17:09,845 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-18 10:17:09,847 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-18 10:17:09,867 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-18 10:17:09,867 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-18 10:17:09,869 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-18 10:17:09,871 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-18 10:17:09,873 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-18 10:17:09,875 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-18 10:17:09,877 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-18 10:17:09,878 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-18 10:17:09,879 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-18 10:17:09,880 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-18 10:17:09,881 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-18 10:17:09,882 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-18 10:17:09,883 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-18 10:17:09,887 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-18 10:17:09,889 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-18 10:17:09,891 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-18 10:17:09,893 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-18 10:17:09,896 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-18 10:17:09,897 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-18 10:17:09,900 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-18 10:17:09,915 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 10:17:09,938 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-18 10:17:09,938 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-18 10:17:09,939 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-18 10:17:09,939 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-18 10:17:09,940 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-18 10:17:09,940 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-18 10:17:09,940 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-18 10:17:09,940 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-18 10:17:09,943 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-18 10:17:09,944 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-18 10:17:09,944 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-09-18 10:17:09,944 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-18 10:17:09,945 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-18 10:17:09,945 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-18 10:17:09,945 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-18 10:17:09,945 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-18 10:17:09,946 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-18 10:17:09,946 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-18 10:17:09,946 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-18 10:17:09,946 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-18 10:17:09,946 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-18 10:17:09,947 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-18 10:17:09,947 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-18 10:17:09,947 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-18 10:17:09,947 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-18 10:17:09,947 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-18 10:17:09,948 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-18 10:17:09,948 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-18 10:17:09,948 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-18 10:17:09,948 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-18 10:17:09,948 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-18 10:17:09,948 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-18 10:17:09,949 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-18 10:17:09,949 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-18 10:17:10,018 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-18 10:17:10,030 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-18 10:17:10,035 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-18 10:17:10,037 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-18 10:17:10,037 INFO L276 PluginConnector]: CDTParser initialized [2018-09-18 10:17:10,038 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label51_true-unreach-call.c [2018-09-18 10:17:10,376 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ff680f57/67cade71eca84b08bee1f728c938305d/FLAG8fd196f79 [2018-09-18 10:17:10,754 INFO L277 CDTParser]: Found 1 translation units. [2018-09-18 10:17:10,755 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label51_true-unreach-call.c [2018-09-18 10:17:10,780 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ff680f57/67cade71eca84b08bee1f728c938305d/FLAG8fd196f79 [2018-09-18 10:17:10,797 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ff680f57/67cade71eca84b08bee1f728c938305d [2018-09-18 10:17:10,810 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-18 10:17:10,813 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-18 10:17:10,815 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-18 10:17:10,815 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-18 10:17:10,822 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-18 10:17:10,824 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 10:17:10" (1/1) ... [2018-09-18 10:17:10,827 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cedc78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:17:10, skipping insertion in model container [2018-09-18 10:17:10,827 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 10:17:10" (1/1) ... [2018-09-18 10:17:10,840 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-18 10:17:11,637 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 10:17:11,659 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-18 10:17:11,897 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 10:17:11,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:17:11 WrapperNode [2018-09-18 10:17:11,960 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-18 10:17:11,961 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-18 10:17:11,961 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-18 10:17:11,961 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-18 10:17:11,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:17:11" (1/1) ... [2018-09-18 10:17:12,011 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:17:11" (1/1) ... [2018-09-18 10:17:12,131 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-18 10:17:12,132 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-18 10:17:12,132 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-18 10:17:12,133 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-18 10:17:12,396 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:17:11" (1/1) ... [2018-09-18 10:17:12,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:17:11" (1/1) ... [2018-09-18 10:17:12,406 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:17:11" (1/1) ... [2018-09-18 10:17:12,406 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:17:11" (1/1) ... [2018-09-18 10:17:12,469 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:17:11" (1/1) ... [2018-09-18 10:17:12,499 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:17:11" (1/1) ... [2018-09-18 10:17:12,520 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:17:11" (1/1) ... [2018-09-18 10:17:12,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-18 10:17:12,532 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-18 10:17:12,532 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-18 10:17:12,532 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-18 10:17:12,533 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:17:11" (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 10:17:12,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-18 10:17:12,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-18 10:17:12,613 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-18 10:17:12,613 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-18 10:17:12,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-18 10:17:12,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-18 10:17:12,614 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-18 10:17:12,614 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-18 10:17:17,278 INFO L356 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-18 10:17:17,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 10:17:17 BoogieIcfgContainer [2018-09-18 10:17:17,279 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-18 10:17:17,280 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-18 10:17:17,280 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-18 10:17:17,284 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-18 10:17:17,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 10:17:10" (1/3) ... [2018-09-18 10:17:17,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e3da7bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 10:17:17, skipping insertion in model container [2018-09-18 10:17:17,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 10:17:11" (2/3) ... [2018-09-18 10:17:17,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e3da7bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 10:17:17, skipping insertion in model container [2018-09-18 10:17:17,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 10:17:17" (3/3) ... [2018-09-18 10:17:17,288 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label51_true-unreach-call.c [2018-09-18 10:17:17,296 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-18 10:17:17,304 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-18 10:17:17,357 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-18 10:17:17,358 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-18 10:17:17,358 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-18 10:17:17,359 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-18 10:17:17,359 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-18 10:17:17,359 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-18 10:17:17,359 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-18 10:17:17,359 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-18 10:17:17,359 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-18 10:17:17,389 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-09-18 10:17:17,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-09-18 10:17:17,416 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:17:17,418 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:17:17,419 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:17:17,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1377037548, now seen corresponding path program 1 times [2018-09-18 10:17:17,427 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:17:17,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:17:17,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:17:17,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:17:17,475 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:17:17,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:17:18,672 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 10:17:18,675 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 10:17:18,675 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-18 10:17:18,676 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:17:18,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-18 10:17:18,696 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-18 10:17:18,697 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 10:17:18,699 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 4 states. [2018-09-18 10:17:22,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:17:22,872 INFO L93 Difference]: Finished difference Result 1077 states and 1927 transitions. [2018-09-18 10:17:22,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-18 10:17:22,876 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 195 [2018-09-18 10:17:22,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:17:22,901 INFO L225 Difference]: With dead ends: 1077 [2018-09-18 10:17:22,902 INFO L226 Difference]: Without dead ends: 759 [2018-09-18 10:17:22,910 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 10:17:22,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2018-09-18 10:17:23,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 519. [2018-09-18 10:17:23,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 519 states. [2018-09-18 10:17:23,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 918 transitions. [2018-09-18 10:17:23,048 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 918 transitions. Word has length 195 [2018-09-18 10:17:23,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:17:23,049 INFO L480 AbstractCegarLoop]: Abstraction has 519 states and 918 transitions. [2018-09-18 10:17:23,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-18 10:17:23,052 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 918 transitions. [2018-09-18 10:17:23,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-09-18 10:17:23,071 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:17:23,072 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:17:23,072 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:17:23,073 INFO L82 PathProgramCache]: Analyzing trace with hash 233310665, now seen corresponding path program 1 times [2018-09-18 10:17:23,073 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:17:23,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:17:23,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:17:23,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:17:23,077 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:17:23,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:17:23,530 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 10:17:23,952 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:17:23,952 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 10:17:23,953 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-18 10:17:23,953 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:17:23,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 10:17:23,960 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 10:17:23,960 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-18 10:17:23,961 INFO L87 Difference]: Start difference. First operand 519 states and 918 transitions. Second operand 6 states. [2018-09-18 10:17:27,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:17:27,582 INFO L93 Difference]: Finished difference Result 1480 states and 2698 transitions. [2018-09-18 10:17:27,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 10:17:27,584 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 223 [2018-09-18 10:17:27,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:17:27,597 INFO L225 Difference]: With dead ends: 1480 [2018-09-18 10:17:27,597 INFO L226 Difference]: Without dead ends: 967 [2018-09-18 10:17:27,600 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-18 10:17:27,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2018-09-18 10:17:27,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 949. [2018-09-18 10:17:27,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 949 states. [2018-09-18 10:17:27,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 1579 transitions. [2018-09-18 10:17:27,663 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 1579 transitions. Word has length 223 [2018-09-18 10:17:27,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:17:27,664 INFO L480 AbstractCegarLoop]: Abstraction has 949 states and 1579 transitions. [2018-09-18 10:17:27,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 10:17:27,664 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 1579 transitions. [2018-09-18 10:17:27,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-09-18 10:17:27,670 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:17:27,670 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:17:27,670 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:17:27,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1168787131, now seen corresponding path program 1 times [2018-09-18 10:17:27,671 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:17:27,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:17:27,672 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:17:27,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:17:27,672 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:17:27,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:17:27,958 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:17:27,958 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 10:17:27,958 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-18 10:17:27,958 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:17:27,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 10:17:27,959 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 10:17:27,960 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-18 10:17:27,960 INFO L87 Difference]: Start difference. First operand 949 states and 1579 transitions. Second operand 6 states. [2018-09-18 10:17:30,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:17:30,974 INFO L93 Difference]: Finished difference Result 2923 states and 5085 transitions. [2018-09-18 10:17:30,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-18 10:17:30,974 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 230 [2018-09-18 10:17:30,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:17:30,989 INFO L225 Difference]: With dead ends: 2923 [2018-09-18 10:17:30,989 INFO L226 Difference]: Without dead ends: 1980 [2018-09-18 10:17:30,996 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-18 10:17:30,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2018-09-18 10:17:31,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1937. [2018-09-18 10:17:31,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1937 states. [2018-09-18 10:17:31,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 3132 transitions. [2018-09-18 10:17:31,089 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 3132 transitions. Word has length 230 [2018-09-18 10:17:31,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:17:31,089 INFO L480 AbstractCegarLoop]: Abstraction has 1937 states and 3132 transitions. [2018-09-18 10:17:31,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 10:17:31,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 3132 transitions. [2018-09-18 10:17:31,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2018-09-18 10:17:31,103 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:17:31,103 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:17:31,103 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:17:31,104 INFO L82 PathProgramCache]: Analyzing trace with hash 735234804, now seen corresponding path program 1 times [2018-09-18 10:17:31,104 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:17:31,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:17:31,105 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:17:31,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:17:31,106 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:17:31,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:17:31,583 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:17:31,584 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 10:17:31,584 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-18 10:17:31,584 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:17:31,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 10:17:31,585 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 10:17:31,586 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 10:17:31,586 INFO L87 Difference]: Start difference. First operand 1937 states and 3132 transitions. Second operand 3 states. [2018-09-18 10:17:33,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:17:33,739 INFO L93 Difference]: Finished difference Result 5678 states and 9481 transitions. [2018-09-18 10:17:33,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 10:17:33,740 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2018-09-18 10:17:33,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:17:33,766 INFO L225 Difference]: With dead ends: 5678 [2018-09-18 10:17:33,767 INFO L226 Difference]: Without dead ends: 3747 [2018-09-18 10:17:33,778 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 10:17:33,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3747 states. [2018-09-18 10:17:33,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3747 to 3742. [2018-09-18 10:17:33,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3742 states. [2018-09-18 10:17:33,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3742 states to 3742 states and 5849 transitions. [2018-09-18 10:17:33,891 INFO L78 Accepts]: Start accepts. Automaton has 3742 states and 5849 transitions. Word has length 241 [2018-09-18 10:17:33,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:17:33,892 INFO L480 AbstractCegarLoop]: Abstraction has 3742 states and 5849 transitions. [2018-09-18 10:17:33,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 10:17:33,892 INFO L276 IsEmpty]: Start isEmpty. Operand 3742 states and 5849 transitions. [2018-09-18 10:17:33,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-09-18 10:17:33,910 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:17:33,910 INFO L376 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:17:33,910 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:17:33,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1160092379, now seen corresponding path program 1 times [2018-09-18 10:17:33,911 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:17:33,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:17:33,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:17:33,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:17:33,913 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:17:33,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:17:34,188 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 10:17:34,616 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 10:17:34,617 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:17:34,617 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 10:17:34,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:17:34,633 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:17:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:17:34,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:17:35,353 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-09-18 10:17:35,354 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:17:35,660 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 10:17:35,702 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 10:17:35,702 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2018-09-18 10:17:35,703 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:17:35,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 10:17:35,704 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 10:17:35,704 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-09-18 10:17:35,704 INFO L87 Difference]: Start difference. First operand 3742 states and 5849 transitions. Second operand 5 states. [2018-09-18 10:17:38,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:17:38,957 INFO L93 Difference]: Finished difference Result 9638 states and 15649 transitions. [2018-09-18 10:17:38,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 10:17:38,959 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 248 [2018-09-18 10:17:38,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:17:38,995 INFO L225 Difference]: With dead ends: 9638 [2018-09-18 10:17:38,995 INFO L226 Difference]: Without dead ends: 5902 [2018-09-18 10:17:39,020 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 490 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2018-09-18 10:17:39,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5902 states. [2018-09-18 10:17:39,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5902 to 5719. [2018-09-18 10:17:39,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5719 states. [2018-09-18 10:17:39,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5719 states to 5719 states and 8242 transitions. [2018-09-18 10:17:39,213 INFO L78 Accepts]: Start accepts. Automaton has 5719 states and 8242 transitions. Word has length 248 [2018-09-18 10:17:39,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:17:39,214 INFO L480 AbstractCegarLoop]: Abstraction has 5719 states and 8242 transitions. [2018-09-18 10:17:39,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 10:17:39,214 INFO L276 IsEmpty]: Start isEmpty. Operand 5719 states and 8242 transitions. [2018-09-18 10:17:39,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2018-09-18 10:17:39,239 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:17:39,239 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-18 10:17:39,240 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:17:39,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1041536929, now seen corresponding path program 1 times [2018-09-18 10:17:39,240 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:17:39,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:17:39,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:17:39,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:17:39,242 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:17:39,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:17:39,899 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 71 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-09-18 10:17:39,900 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:17:39,900 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 10:17:39,918 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:17:39,918 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:17:40,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:17:40,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:17:40,333 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-18 10:17:40,333 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:17:40,559 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-18 10:17:40,596 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:17:40,596 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 4 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 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 10:17:40,623 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:17:40,623 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:17:41,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:17:41,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:17:41,502 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-18 10:17:41,502 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:17:41,830 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-18 10:17:41,838 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:17:41,838 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 15 [2018-09-18 10:17:41,838 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:17:41,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 10:17:41,846 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 10:17:41,846 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-09-18 10:17:41,846 INFO L87 Difference]: Start difference. First operand 5719 states and 8242 transitions. Second operand 9 states. [2018-09-18 10:17:46,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:17:46,262 INFO L93 Difference]: Finished difference Result 16978 states and 27759 transitions. [2018-09-18 10:17:46,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-18 10:17:46,265 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 261 [2018-09-18 10:17:46,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:17:46,347 INFO L225 Difference]: With dead ends: 16978 [2018-09-18 10:17:46,348 INFO L226 Difference]: Without dead ends: 11265 [2018-09-18 10:17:46,384 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1062 GetRequests, 1039 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2018-09-18 10:17:46,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11265 states. [2018-09-18 10:17:46,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11265 to 10189. [2018-09-18 10:17:46,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10189 states. [2018-09-18 10:17:46,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10189 states to 10189 states and 14199 transitions. [2018-09-18 10:17:46,852 INFO L78 Accepts]: Start accepts. Automaton has 10189 states and 14199 transitions. Word has length 261 [2018-09-18 10:17:46,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:17:46,853 INFO L480 AbstractCegarLoop]: Abstraction has 10189 states and 14199 transitions. [2018-09-18 10:17:46,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-18 10:17:46,853 INFO L276 IsEmpty]: Start isEmpty. Operand 10189 states and 14199 transitions. [2018-09-18 10:17:46,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-09-18 10:17:46,900 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:17:46,901 INFO L376 BasicCegarLoop]: trace histogram [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, 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] [2018-09-18 10:17:46,901 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:17:46,902 INFO L82 PathProgramCache]: Analyzing trace with hash -61853199, now seen corresponding path program 1 times [2018-09-18 10:17:46,902 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:17:46,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:17:46,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:17:46,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:17:46,908 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:17:46,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:17:47,597 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-18 10:17:47,834 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 114 proven. 34 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-09-18 10:17:47,834 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:17:47,834 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 10:17:47,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:17:47,849 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:17:48,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:17:48,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:17:48,426 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 114 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-09-18 10:17:48,426 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:17:49,029 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-09-18 10:17:49,051 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:17:49,051 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 10:17:49,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:17:49,076 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:17:49,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:17:49,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:17:49,672 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 114 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-09-18 10:17:49,673 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:17:49,868 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-09-18 10:17:49,871 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:17:49,872 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4, 4, 4] total 13 [2018-09-18 10:17:49,872 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:17:49,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-18 10:17:49,873 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-18 10:17:49,873 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2018-09-18 10:17:49,873 INFO L87 Difference]: Start difference. First operand 10189 states and 14199 transitions. Second operand 8 states. [2018-09-18 10:17:57,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:17:57,253 INFO L93 Difference]: Finished difference Result 27663 states and 47438 transitions. [2018-09-18 10:17:57,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-18 10:17:57,253 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 302 [2018-09-18 10:17:57,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:17:57,404 INFO L225 Difference]: With dead ends: 27663 [2018-09-18 10:17:57,404 INFO L226 Difference]: Without dead ends: 17480 [2018-09-18 10:17:57,483 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1263 GetRequests, 1223 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=308, Invalid=1174, Unknown=0, NotChecked=0, Total=1482 [2018-09-18 10:17:57,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17480 states. [2018-09-18 10:17:58,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17480 to 15171. [2018-09-18 10:17:58,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15171 states. [2018-09-18 10:17:58,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15171 states to 15171 states and 20488 transitions. [2018-09-18 10:17:58,235 INFO L78 Accepts]: Start accepts. Automaton has 15171 states and 20488 transitions. Word has length 302 [2018-09-18 10:17:58,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:17:58,236 INFO L480 AbstractCegarLoop]: Abstraction has 15171 states and 20488 transitions. [2018-09-18 10:17:58,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-18 10:17:58,236 INFO L276 IsEmpty]: Start isEmpty. Operand 15171 states and 20488 transitions. [2018-09-18 10:17:58,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2018-09-18 10:17:58,287 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:17:58,287 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 10:17:58,288 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:17:58,288 INFO L82 PathProgramCache]: Analyzing trace with hash 144350631, now seen corresponding path program 1 times [2018-09-18 10:17:58,288 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:17:58,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:17:58,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:17:58,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:17:58,289 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:17:58,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:17:58,989 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 138 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:17:58,989 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:17:58,989 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 10:17:58,997 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:17:58,997 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:17:59,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:17:59,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:17:59,326 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-09-18 10:17:59,327 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:17:59,651 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 105 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 10:17:59,672 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 10:17:59,673 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2018-09-18 10:17:59,673 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:17:59,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 10:17:59,674 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 10:17:59,674 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-09-18 10:17:59,674 INFO L87 Difference]: Start difference. First operand 15171 states and 20488 transitions. Second operand 6 states. [2018-09-18 10:18:01,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:18:01,816 INFO L93 Difference]: Finished difference Result 29345 states and 41004 transitions. [2018-09-18 10:18:01,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-18 10:18:01,817 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 308 [2018-09-18 10:18:01,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:18:01,893 INFO L225 Difference]: With dead ends: 29345 [2018-09-18 10:18:01,893 INFO L226 Difference]: Without dead ends: 15599 [2018-09-18 10:18:01,931 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 608 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2018-09-18 10:18:01,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15599 states. [2018-09-18 10:18:02,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15599 to 15281. [2018-09-18 10:18:02,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15281 states. [2018-09-18 10:18:02,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15281 states to 15281 states and 20541 transitions. [2018-09-18 10:18:02,463 INFO L78 Accepts]: Start accepts. Automaton has 15281 states and 20541 transitions. Word has length 308 [2018-09-18 10:18:02,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:18:02,463 INFO L480 AbstractCegarLoop]: Abstraction has 15281 states and 20541 transitions. [2018-09-18 10:18:02,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 10:18:02,464 INFO L276 IsEmpty]: Start isEmpty. Operand 15281 states and 20541 transitions. [2018-09-18 10:18:02,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2018-09-18 10:18:02,517 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:18:02,517 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 10:18:02,518 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:18:02,518 INFO L82 PathProgramCache]: Analyzing trace with hash -825276038, now seen corresponding path program 1 times [2018-09-18 10:18:02,518 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:18:02,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:18:02,519 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:18:02,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:18:02,519 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:18:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:18:03,223 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 109 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 10:18:03,224 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:18:03,224 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 10:18:03,232 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:18:03,232 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:18:03,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:18:03,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:18:03,630 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-09-18 10:18:03,631 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:18:03,988 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 109 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 10:18:04,012 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 10:18:04,012 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-18 10:18:04,012 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:18:04,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 10:18:04,013 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 10:18:04,013 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-09-18 10:18:04,013 INFO L87 Difference]: Start difference. First operand 15281 states and 20541 transitions. Second operand 5 states. [2018-09-18 10:18:06,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:18:06,604 INFO L93 Difference]: Finished difference Result 37234 states and 51290 transitions. [2018-09-18 10:18:06,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-18 10:18:06,605 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 310 [2018-09-18 10:18:06,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:18:06,708 INFO L225 Difference]: With dead ends: 37234 [2018-09-18 10:18:06,708 INFO L226 Difference]: Without dead ends: 22843 [2018-09-18 10:18:06,750 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 615 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-09-18 10:18:06,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22843 states. [2018-09-18 10:18:07,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22843 to 21877. [2018-09-18 10:18:07,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21877 states. [2018-09-18 10:18:07,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21877 states to 21877 states and 29481 transitions. [2018-09-18 10:18:07,331 INFO L78 Accepts]: Start accepts. Automaton has 21877 states and 29481 transitions. Word has length 310 [2018-09-18 10:18:07,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:18:07,331 INFO L480 AbstractCegarLoop]: Abstraction has 21877 states and 29481 transitions. [2018-09-18 10:18:07,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 10:18:07,332 INFO L276 IsEmpty]: Start isEmpty. Operand 21877 states and 29481 transitions. [2018-09-18 10:18:07,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2018-09-18 10:18:07,361 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:18:07,361 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 10:18:07,361 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:18:07,362 INFO L82 PathProgramCache]: Analyzing trace with hash 681995704, now seen corresponding path program 1 times [2018-09-18 10:18:07,362 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:18:07,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:18:07,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:18:07,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:18:07,363 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:18:07,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:18:07,831 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 12 [2018-09-18 10:18:08,157 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:18:08,157 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 10:18:08,157 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-18 10:18:08,157 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:18:08,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-18 10:18:08,158 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-18 10:18:08,158 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-09-18 10:18:08,159 INFO L87 Difference]: Start difference. First operand 21877 states and 29481 transitions. Second operand 7 states. [2018-09-18 10:18:10,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:18:10,716 INFO L93 Difference]: Finished difference Result 55109 states and 74401 transitions. [2018-09-18 10:18:10,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-18 10:18:10,717 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 330 [2018-09-18 10:18:10,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:18:10,857 INFO L225 Difference]: With dead ends: 55109 [2018-09-18 10:18:10,858 INFO L226 Difference]: Without dead ends: 34684 [2018-09-18 10:18:10,901 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2018-09-18 10:18:10,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34684 states. [2018-09-18 10:18:11,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34684 to 33877. [2018-09-18 10:18:11,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33877 states. [2018-09-18 10:18:11,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33877 states to 33877 states and 44016 transitions. [2018-09-18 10:18:11,763 INFO L78 Accepts]: Start accepts. Automaton has 33877 states and 44016 transitions. Word has length 330 [2018-09-18 10:18:11,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:18:11,764 INFO L480 AbstractCegarLoop]: Abstraction has 33877 states and 44016 transitions. [2018-09-18 10:18:11,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-18 10:18:11,764 INFO L276 IsEmpty]: Start isEmpty. Operand 33877 states and 44016 transitions. [2018-09-18 10:18:11,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2018-09-18 10:18:11,812 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:18:11,813 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 10:18:11,813 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:18:11,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1523706639, now seen corresponding path program 1 times [2018-09-18 10:18:11,814 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:18:11,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:18:11,814 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:18:11,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:18:11,815 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:18:11,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:18:12,101 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-09-18 10:18:12,471 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-09-18 10:18:12,675 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-09-18 10:18:12,876 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 129 proven. 28 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-09-18 10:18:12,876 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:18:12,877 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 10:18:12,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:18:12,893 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:18:13,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:18:13,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:18:13,226 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2018-09-18 10:18:13,226 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:18:13,353 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 129 proven. 28 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-09-18 10:18:13,375 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 10:18:13,375 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 11 [2018-09-18 10:18:13,376 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:18:13,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 10:18:13,377 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 10:18:13,377 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-09-18 10:18:13,377 INFO L87 Difference]: Start difference. First operand 33877 states and 44016 transitions. Second operand 5 states. [2018-09-18 10:18:15,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:18:15,942 INFO L93 Difference]: Finished difference Result 84802 states and 109373 transitions. [2018-09-18 10:18:15,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 10:18:15,942 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 338 [2018-09-18 10:18:15,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:18:16,111 INFO L225 Difference]: With dead ends: 84802 [2018-09-18 10:18:16,112 INFO L226 Difference]: Without dead ends: 52556 [2018-09-18 10:18:16,525 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 686 GetRequests, 670 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2018-09-18 10:18:16,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52556 states. [2018-09-18 10:18:17,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52556 to 50910. [2018-09-18 10:18:17,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50910 states. [2018-09-18 10:18:17,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50910 states to 50910 states and 63906 transitions. [2018-09-18 10:18:17,656 INFO L78 Accepts]: Start accepts. Automaton has 50910 states and 63906 transitions. Word has length 338 [2018-09-18 10:18:17,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:18:17,656 INFO L480 AbstractCegarLoop]: Abstraction has 50910 states and 63906 transitions. [2018-09-18 10:18:17,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 10:18:17,657 INFO L276 IsEmpty]: Start isEmpty. Operand 50910 states and 63906 transitions. [2018-09-18 10:18:17,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2018-09-18 10:18:17,709 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:18:17,709 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 10:18:17,709 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:18:17,710 INFO L82 PathProgramCache]: Analyzing trace with hash 191731517, now seen corresponding path program 1 times [2018-09-18 10:18:17,710 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:18:17,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:18:17,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:18:17,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:18:17,711 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:18:17,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:18:18,594 WARN L178 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-09-18 10:18:18,808 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 185 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:18:18,809 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:18:18,809 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 10:18:18,817 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:18:18,818 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:18:19,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:18:19,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:18:19,673 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-09-18 10:18:19,674 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:18:20,180 WARN L178 SmtUtils]: Spent 449.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-09-18 10:18:20,448 WARN L178 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 38 [2018-09-18 10:18:20,537 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-09-18 10:18:20,758 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 140 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 10:18:20,780 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 10:18:20,781 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 12 [2018-09-18 10:18:20,781 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:18:20,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 10:18:20,781 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 10:18:20,782 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2018-09-18 10:18:20,782 INFO L87 Difference]: Start difference. First operand 50910 states and 63906 transitions. Second operand 5 states. [2018-09-18 10:18:23,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:18:23,436 INFO L93 Difference]: Finished difference Result 100555 states and 126103 transitions. [2018-09-18 10:18:23,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-18 10:18:23,436 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 341 [2018-09-18 10:18:23,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:18:23,569 INFO L225 Difference]: With dead ends: 100555 [2018-09-18 10:18:23,569 INFO L226 Difference]: Without dead ends: 51316 [2018-09-18 10:18:23,638 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 678 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2018-09-18 10:18:23,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51316 states. [2018-09-18 10:18:24,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51316 to 50911. [2018-09-18 10:18:24,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50911 states. [2018-09-18 10:18:24,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50911 states to 50911 states and 62673 transitions. [2018-09-18 10:18:24,773 INFO L78 Accepts]: Start accepts. Automaton has 50911 states and 62673 transitions. Word has length 341 [2018-09-18 10:18:24,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:18:24,773 INFO L480 AbstractCegarLoop]: Abstraction has 50911 states and 62673 transitions. [2018-09-18 10:18:24,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 10:18:24,774 INFO L276 IsEmpty]: Start isEmpty. Operand 50911 states and 62673 transitions. [2018-09-18 10:18:24,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2018-09-18 10:18:24,835 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:18:24,835 INFO L376 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 10:18:24,836 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:18:24,836 INFO L82 PathProgramCache]: Analyzing trace with hash 860820868, now seen corresponding path program 1 times [2018-09-18 10:18:24,836 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:18:24,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:18:24,837 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:18:24,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:18:24,838 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:18:24,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:18:25,455 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 148 proven. 8 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-09-18 10:18:25,455 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:18:25,455 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:18:25,467 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:18:25,467 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:18:25,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:18:25,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:18:26,197 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 181 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-18 10:18:26,197 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:18:26,557 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 181 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-18 10:18:26,579 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:18:26,579 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 12 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 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 10:18:26,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:18:26,595 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:18:27,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:18:27,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:18:27,230 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 181 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-18 10:18:27,230 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:18:27,643 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 181 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-18 10:18:27,646 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:18:27,646 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 14 [2018-09-18 10:18:27,647 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:18:27,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-18 10:18:27,648 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-18 10:18:27,648 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-09-18 10:18:27,648 INFO L87 Difference]: Start difference. First operand 50911 states and 62673 transitions. Second operand 8 states. [2018-09-18 10:18:36,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:18:36,872 INFO L93 Difference]: Finished difference Result 147014 states and 195319 transitions. [2018-09-18 10:18:36,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-18 10:18:36,872 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 342 [2018-09-18 10:18:36,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:18:37,284 INFO L225 Difference]: With dead ends: 147014 [2018-09-18 10:18:37,285 INFO L226 Difference]: Without dead ends: 96325 [2018-09-18 10:18:37,410 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1438 GetRequests, 1390 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=426, Invalid=1830, Unknown=0, NotChecked=0, Total=2256 [2018-09-18 10:18:37,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96325 states. [2018-09-18 10:18:40,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96325 to 92728. [2018-09-18 10:18:40,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92728 states. [2018-09-18 10:18:40,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92728 states to 92728 states and 111665 transitions. [2018-09-18 10:18:40,179 INFO L78 Accepts]: Start accepts. Automaton has 92728 states and 111665 transitions. Word has length 342 [2018-09-18 10:18:40,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:18:40,180 INFO L480 AbstractCegarLoop]: Abstraction has 92728 states and 111665 transitions. [2018-09-18 10:18:40,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-18 10:18:40,180 INFO L276 IsEmpty]: Start isEmpty. Operand 92728 states and 111665 transitions. [2018-09-18 10:18:40,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-09-18 10:18:40,252 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:18:40,252 INFO L376 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 10:18:40,252 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:18:40,252 INFO L82 PathProgramCache]: Analyzing trace with hash -784758727, now seen corresponding path program 1 times [2018-09-18 10:18:40,253 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:18:40,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:18:40,253 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:18:40,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:18:40,254 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:18:40,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:18:40,908 WARN L178 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-18 10:18:41,232 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 166 proven. 46 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-09-18 10:18:41,232 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:18:41,233 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 10:18:41,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:18:41,241 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:18:41,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:18:41,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:18:41,589 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2018-09-18 10:18:41,590 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:18:41,695 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 150 proven. 16 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-09-18 10:18:41,716 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 10:18:41,716 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2018-09-18 10:18:41,716 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:18:41,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 10:18:41,717 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 10:18:41,717 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-09-18 10:18:41,717 INFO L87 Difference]: Start difference. First operand 92728 states and 111665 transitions. Second operand 5 states. [2018-09-18 10:18:44,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:18:44,664 INFO L93 Difference]: Finished difference Result 167168 states and 204040 transitions. [2018-09-18 10:18:44,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 10:18:44,665 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 354 [2018-09-18 10:18:44,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:18:44,880 INFO L225 Difference]: With dead ends: 167168 [2018-09-18 10:18:44,880 INFO L226 Difference]: Without dead ends: 74838 [2018-09-18 10:18:44,996 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 716 GetRequests, 705 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-09-18 10:18:45,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74838 states. [2018-09-18 10:18:47,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74838 to 73570. [2018-09-18 10:18:47,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73570 states. [2018-09-18 10:18:47,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73570 states to 73570 states and 87033 transitions. [2018-09-18 10:18:47,273 INFO L78 Accepts]: Start accepts. Automaton has 73570 states and 87033 transitions. Word has length 354 [2018-09-18 10:18:47,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:18:47,273 INFO L480 AbstractCegarLoop]: Abstraction has 73570 states and 87033 transitions. [2018-09-18 10:18:47,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 10:18:47,273 INFO L276 IsEmpty]: Start isEmpty. Operand 73570 states and 87033 transitions. [2018-09-18 10:18:47,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-09-18 10:18:47,330 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:18:47,331 INFO L376 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 10:18:47,331 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:18:47,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1294549902, now seen corresponding path program 1 times [2018-09-18 10:18:47,331 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:18:47,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:18:47,332 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:18:47,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:18:47,332 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:18:47,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:18:47,668 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-09-18 10:18:47,815 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-09-18 10:18:47,977 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 229 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-09-18 10:18:47,978 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:18:47,978 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 10:18:47,987 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:18:47,988 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:18:48,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:18:48,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:18:48,387 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 203 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-09-18 10:18:48,387 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:18:48,675 WARN L178 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2018-09-18 10:18:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 184 proven. 46 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-18 10:18:49,370 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:18:49,371 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 10:18:49,386 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:18:49,387 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:18:49,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:18:49,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:18:50,173 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 203 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-09-18 10:18:50,174 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:18:50,461 WARN L178 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2018-09-18 10:18:51,670 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 165 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 10:18:51,674 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:18:51,674 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 8, 8] total 22 [2018-09-18 10:18:51,675 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:18:51,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-18 10:18:51,676 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-18 10:18:51,676 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2018-09-18 10:18:51,677 INFO L87 Difference]: Start difference. First operand 73570 states and 87033 transitions. Second operand 10 states. [2018-09-18 10:19:10,997 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-09-18 10:19:16,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:19:16,964 INFO L93 Difference]: Finished difference Result 208430 states and 312374 transitions. [2018-09-18 10:19:16,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-18 10:19:16,965 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 363 [2018-09-18 10:19:16,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:19:17,494 INFO L225 Difference]: With dead ends: 208430 [2018-09-18 10:19:17,495 INFO L226 Difference]: Without dead ends: 126640 [2018-09-18 10:19:17,681 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1595 GetRequests, 1498 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3166 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1433, Invalid=8269, Unknown=0, NotChecked=0, Total=9702 [2018-09-18 10:19:17,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126640 states. [2018-09-18 10:19:21,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126640 to 109977. [2018-09-18 10:19:21,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109977 states. [2018-09-18 10:19:21,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109977 states to 109977 states and 125242 transitions. [2018-09-18 10:19:21,235 INFO L78 Accepts]: Start accepts. Automaton has 109977 states and 125242 transitions. Word has length 363 [2018-09-18 10:19:21,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:19:21,235 INFO L480 AbstractCegarLoop]: Abstraction has 109977 states and 125242 transitions. [2018-09-18 10:19:21,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-18 10:19:21,235 INFO L276 IsEmpty]: Start isEmpty. Operand 109977 states and 125242 transitions. [2018-09-18 10:19:21,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2018-09-18 10:19:21,344 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:19:21,345 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, 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, 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 10:19:21,345 INFO L423 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:19:21,345 INFO L82 PathProgramCache]: Analyzing trace with hash -563277750, now seen corresponding path program 1 times [2018-09-18 10:19:21,345 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:19:21,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:19:21,346 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:19:21,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:19:21,347 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:19:21,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:19:21,925 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 228 proven. 34 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-09-18 10:19:21,926 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:19:21,926 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 10:19:21,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:19:21,935 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:19:22,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:19:22,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:19:22,315 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 214 proven. 30 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-09-18 10:19:22,315 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:19:22,512 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 242 proven. 2 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-09-18 10:19:22,535 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:19:22,535 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 17 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 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 10:19:22,551 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:19:22,551 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:19:23,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:19:23,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:19:23,351 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 176 proven. 74 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-09-18 10:19:23,351 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:19:23,524 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 246 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-09-18 10:19:23,527 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:19:23,528 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4, 4, 4] total 13 [2018-09-18 10:19:23,528 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:19:23,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-18 10:19:23,529 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-18 10:19:23,529 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-09-18 10:19:23,530 INFO L87 Difference]: Start difference. First operand 109977 states and 125242 transitions. Second operand 8 states. [2018-09-18 10:19:30,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:19:30,874 INFO L93 Difference]: Finished difference Result 197768 states and 234310 transitions. [2018-09-18 10:19:30,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-18 10:19:30,874 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 380 [2018-09-18 10:19:30,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:19:31,124 INFO L225 Difference]: With dead ends: 197768 [2018-09-18 10:19:31,124 INFO L226 Difference]: Without dead ends: 91182 [2018-09-18 10:19:31,262 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1563 GetRequests, 1529 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=235, Invalid=821, Unknown=0, NotChecked=0, Total=1056 [2018-09-18 10:19:31,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91182 states. [2018-09-18 10:19:33,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91182 to 83702. [2018-09-18 10:19:33,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83702 states. [2018-09-18 10:19:33,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83702 states to 83702 states and 92780 transitions. [2018-09-18 10:19:33,517 INFO L78 Accepts]: Start accepts. Automaton has 83702 states and 92780 transitions. Word has length 380 [2018-09-18 10:19:33,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:19:33,517 INFO L480 AbstractCegarLoop]: Abstraction has 83702 states and 92780 transitions. [2018-09-18 10:19:33,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-18 10:19:33,518 INFO L276 IsEmpty]: Start isEmpty. Operand 83702 states and 92780 transitions. [2018-09-18 10:19:33,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2018-09-18 10:19:33,575 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:19:33,575 INFO L376 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 10:19:33,575 INFO L423 AbstractCegarLoop]: === Iteration 17 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:19:33,575 INFO L82 PathProgramCache]: Analyzing trace with hash 640422368, now seen corresponding path program 1 times [2018-09-18 10:19:33,576 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:19:33,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:19:33,576 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:19:33,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:19:33,577 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:19:33,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:19:34,005 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 182 proven. 60 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 10:19:34,006 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:19:34,006 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:19:34,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:19:34,015 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:19:34,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:19:34,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:19:34,411 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-09-18 10:19:34,411 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:19:34,670 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 184 proven. 49 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-09-18 10:19:34,693 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 10:19:34,694 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 5] total 14 [2018-09-18 10:19:34,694 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:19:34,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 10:19:34,694 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 10:19:34,695 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2018-09-18 10:19:34,695 INFO L87 Difference]: Start difference. First operand 83702 states and 92780 transitions. Second operand 5 states. [2018-09-18 10:19:37,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:19:37,699 INFO L93 Difference]: Finished difference Result 195723 states and 219432 transitions. [2018-09-18 10:19:37,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-18 10:19:37,700 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 382 [2018-09-18 10:19:37,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:19:37,917 INFO L225 Difference]: With dead ends: 195723 [2018-09-18 10:19:37,918 INFO L226 Difference]: Without dead ends: 116904 [2018-09-18 10:19:37,976 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 756 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2018-09-18 10:19:38,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116904 states. [2018-09-18 10:19:39,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116904 to 114202. [2018-09-18 10:19:39,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114202 states. [2018-09-18 10:19:39,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114202 states to 114202 states and 125666 transitions. [2018-09-18 10:19:39,767 INFO L78 Accepts]: Start accepts. Automaton has 114202 states and 125666 transitions. Word has length 382 [2018-09-18 10:19:39,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:19:39,768 INFO L480 AbstractCegarLoop]: Abstraction has 114202 states and 125666 transitions. [2018-09-18 10:19:39,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 10:19:39,768 INFO L276 IsEmpty]: Start isEmpty. Operand 114202 states and 125666 transitions. [2018-09-18 10:19:39,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2018-09-18 10:19:39,811 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:19:39,811 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, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:19:39,811 INFO L423 AbstractCegarLoop]: === Iteration 18 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:19:39,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1466499758, now seen corresponding path program 1 times [2018-09-18 10:19:39,812 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:19:39,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:19:39,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:19:39,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:19:39,813 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:19:39,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:19:40,288 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 258 proven. 34 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-09-18 10:19:40,288 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:19:40,288 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:19:40,299 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:19:40,299 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:19:40,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:19:40,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:19:43,962 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 290 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-09-18 10:19:43,965 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:19:44,327 WARN L178 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2018-09-18 10:19:44,451 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2018-09-18 10:19:44,702 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 258 proven. 34 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-09-18 10:19:44,724 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:19:44,724 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 20 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 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 10:19:44,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:19:44,741 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:19:45,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:19:45,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:19:45,528 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 290 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-09-18 10:19:45,529 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:19:45,999 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 258 proven. 34 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-09-18 10:19:46,003 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:19:46,003 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 14 [2018-09-18 10:19:46,003 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:19:46,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 10:19:46,004 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 10:19:46,004 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2018-09-18 10:19:46,004 INFO L87 Difference]: Start difference. First operand 114202 states and 125666 transitions. Second operand 9 states. [2018-09-18 10:19:57,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:19:57,426 INFO L93 Difference]: Finished difference Result 233721 states and 274898 transitions. [2018-09-18 10:19:57,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-18 10:19:57,427 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 395 [2018-09-18 10:19:57,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:19:57,876 INFO L225 Difference]: With dead ends: 233721 [2018-09-18 10:19:57,877 INFO L226 Difference]: Without dead ends: 122984 [2018-09-18 10:19:58,018 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1660 GetRequests, 1609 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=478, Invalid=2174, Unknown=0, NotChecked=0, Total=2652 [2018-09-18 10:19:58,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122984 states. [2018-09-18 10:20:00,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122984 to 111518. [2018-09-18 10:20:00,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111518 states. [2018-09-18 10:20:00,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111518 states to 111518 states and 121780 transitions. [2018-09-18 10:20:00,853 INFO L78 Accepts]: Start accepts. Automaton has 111518 states and 121780 transitions. Word has length 395 [2018-09-18 10:20:00,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:20:00,853 INFO L480 AbstractCegarLoop]: Abstraction has 111518 states and 121780 transitions. [2018-09-18 10:20:00,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-18 10:20:00,853 INFO L276 IsEmpty]: Start isEmpty. Operand 111518 states and 121780 transitions. [2018-09-18 10:20:00,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2018-09-18 10:20:00,904 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:20:00,905 INFO L376 BasicCegarLoop]: trace histogram [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, 4, 4, 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, 1, 1, 1, 1, 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 10:20:00,905 INFO L423 AbstractCegarLoop]: === Iteration 19 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:20:00,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1924281348, now seen corresponding path program 1 times [2018-09-18 10:20:00,906 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:20:00,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:20:00,907 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:20:00,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:20:00,907 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:20:00,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:20:01,350 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 331 proven. 59 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2018-09-18 10:20:01,351 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:20:01,351 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:20:01,359 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:20:01,359 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:20:01,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:20:01,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:20:01,788 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 404 proven. 4 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-09-18 10:20:01,789 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:20:02,007 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 333 proven. 47 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-09-18 10:20:02,626 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:20:02,626 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 22 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 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 10:20:02,646 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:20:02,646 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:20:03,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:20:03,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:20:03,452 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 404 proven. 4 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-09-18 10:20:03,453 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:20:03,626 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 333 proven. 47 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-09-18 10:20:03,629 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 10:20:03,630 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 8 [2018-09-18 10:20:03,630 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 10:20:03,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-18 10:20:03,631 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-18 10:20:03,631 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-09-18 10:20:03,631 INFO L87 Difference]: Start difference. First operand 111518 states and 121780 transitions. Second operand 7 states. [2018-09-18 10:20:09,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:20:09,906 INFO L93 Difference]: Finished difference Result 323229 states and 363834 transitions. [2018-09-18 10:20:09,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-18 10:20:09,907 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 425 [2018-09-18 10:20:09,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:20:10,507 INFO L225 Difference]: With dead ends: 323229 [2018-09-18 10:20:10,507 INFO L226 Difference]: Without dead ends: 224142 [2018-09-18 10:20:10,613 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1710 GetRequests, 1692 SyntacticMatches, 10 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-09-18 10:20:10,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224142 states. [2018-09-18 10:20:14,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224142 to 217926. [2018-09-18 10:20:14,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217926 states. [2018-09-18 10:20:14,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217926 states to 217926 states and 239125 transitions. [2018-09-18 10:20:14,944 INFO L78 Accepts]: Start accepts. Automaton has 217926 states and 239125 transitions. Word has length 425 [2018-09-18 10:20:14,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:20:14,945 INFO L480 AbstractCegarLoop]: Abstraction has 217926 states and 239125 transitions. [2018-09-18 10:20:14,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-18 10:20:14,945 INFO L276 IsEmpty]: Start isEmpty. Operand 217926 states and 239125 transitions. [2018-09-18 10:20:15,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2018-09-18 10:20:15,047 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:20:15,047 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 10:20:15,047 INFO L423 AbstractCegarLoop]: === Iteration 20 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:20:15,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1232524515, now seen corresponding path program 1 times [2018-09-18 10:20:15,048 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:20:15,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:20:15,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:20:15,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:20:15,049 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:20:15,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:20:15,537 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 385 proven. 37 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-09-18 10:20:15,537 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:20:15,537 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:20:15,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:20:15,545 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:20:15,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:20:15,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:20:15,984 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2018-09-18 10:20:15,984 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:20:17,161 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 219 proven. 84 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2018-09-18 10:20:17,183 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 10:20:17,184 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 5] total 15 [2018-09-18 10:20:17,184 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:20:17,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 10:20:17,185 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 10:20:17,185 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2018-09-18 10:20:17,185 INFO L87 Difference]: Start difference. First operand 217926 states and 239125 transitions. Second operand 5 states. [2018-09-18 10:20:24,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:20:24,031 INFO L93 Difference]: Finished difference Result 504987 states and 549685 transitions. [2018-09-18 10:20:24,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-18 10:20:24,031 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 426 [2018-09-18 10:20:24,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:20:24,882 INFO L225 Difference]: With dead ends: 504987 [2018-09-18 10:20:24,882 INFO L226 Difference]: Without dead ends: 300415 [2018-09-18 10:20:25,069 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 864 GetRequests, 846 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2018-09-18 10:20:25,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300415 states. [2018-09-18 10:20:30,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300415 to 298541. [2018-09-18 10:20:30,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298541 states. [2018-09-18 10:20:30,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298541 states to 298541 states and 324094 transitions. [2018-09-18 10:20:30,957 INFO L78 Accepts]: Start accepts. Automaton has 298541 states and 324094 transitions. Word has length 426 [2018-09-18 10:20:30,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 10:20:30,958 INFO L480 AbstractCegarLoop]: Abstraction has 298541 states and 324094 transitions. [2018-09-18 10:20:30,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 10:20:30,958 INFO L276 IsEmpty]: Start isEmpty. Operand 298541 states and 324094 transitions. [2018-09-18 10:20:31,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2018-09-18 10:20:31,100 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 10:20:31,100 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:20:31,100 INFO L423 AbstractCegarLoop]: === Iteration 21 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 10:20:31,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1350115274, now seen corresponding path program 1 times [2018-09-18 10:20:31,100 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 10:20:31,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:20:31,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:20:31,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 10:20:31,101 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 10:20:31,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:20:32,320 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 255 proven. 4 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2018-09-18 10:20:32,320 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:20:32,320 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 10:20:32,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 10:20:32,330 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 10:20:32,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 10:20:32,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:20:32,690 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 277 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2018-09-18 10:20:32,690 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:20:32,807 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 255 proven. 4 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2018-09-18 10:20:32,828 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 10:20:32,829 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 4 [2018-09-18 10:20:32,829 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 10:20:32,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 10:20:32,829 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 10:20:32,829 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-18 10:20:32,830 INFO L87 Difference]: Start difference. First operand 298541 states and 324094 transitions. Second operand 3 states. [2018-09-18 10:20:41,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 10:20:41,500 INFO L93 Difference]: Finished difference Result 577784 states and 626980 transitions. [2018-09-18 10:20:41,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 10:20:41,501 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 441 [2018-09-18 10:20:41,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 10:20:42,603 INFO L225 Difference]: With dead ends: 577784 [2018-09-18 10:20:42,604 INFO L226 Difference]: Without dead ends: 298490 [2018-09-18 10:20:42,873 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 885 GetRequests, 883 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-18 10:20:43,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298490 states. Received shutdown request... [2018-09-18 10:20:49,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298490 to 298484. [2018-09-18 10:20:49,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298484 states. [2018-09-18 10:20:49,051 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-18 10:20:49,055 WARN L206 ceAbstractionStarter]: Timeout [2018-09-18 10:20:49,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.09 10:20:49 BoogieIcfgContainer [2018-09-18 10:20:49,056 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-18 10:20:49,057 INFO L168 Benchmark]: Toolchain (without parser) took 218246.22 ms. Allocated memory was 1.5 GB in the beginning and 5.0 GB in the end (delta: 3.5 GB). Free memory was 1.4 GB in the beginning and 3.0 GB in the end (delta: -1.6 GB). Peak memory consumption was 4.0 GB. Max. memory is 7.1 GB. [2018-09-18 10:20:49,058 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-18 10:20:49,058 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1146.02 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. [2018-09-18 10:20:49,059 INFO L168 Benchmark]: Boogie Procedure Inliner took 170.88 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-09-18 10:20:49,059 INFO L168 Benchmark]: Boogie Preprocessor took 399.25 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 812.1 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -944.6 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. [2018-09-18 10:20:49,060 INFO L168 Benchmark]: RCFGBuilder took 4747.08 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 259.3 MB). Peak memory consumption was 259.3 MB. Max. memory is 7.1 GB. [2018-09-18 10:20:49,061 INFO L168 Benchmark]: TraceAbstraction took 211776.10 ms. Allocated memory was 2.3 GB in the beginning and 5.0 GB in the end (delta: 2.7 GB). Free memory was 2.0 GB in the beginning and 3.0 GB in the end (delta: -1.0 GB). Peak memory consumption was 3.8 GB. Max. memory is 7.1 GB. [2018-09-18 10:20:49,066 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1146.02 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 170.88 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 399.25 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 812.1 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -944.6 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4747.08 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 259.3 MB). Peak memory consumption was 259.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 211776.10 ms. Allocated memory was 2.3 GB in the beginning and 5.0 GB in the end (delta: 2.7 GB). Free memory was 2.0 GB in the beginning and 3.0 GB in the end (delta: -1.0 GB). Peak memory consumption was 3.8 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1599]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1599). Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 211.7s OverallTime, 21 OverallIterations, 6 TraceHistogramMax, 129.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4632 SDtfs, 27355 SDslu, 7670 SDs, 0 SdLazy, 47598 SolverSat, 8814 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 63.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16710 GetRequests, 16244 SyntacticMatches, 44 SemanticMatches, 422 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5303 ImplicationChecksByTransitivity, 18.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=298541occurred in iteration=20, 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: 37.9s AutomataMinimizationTime, 21 MinimizatonAttempts, 59282 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.5s SsaConstructionTime, 7.3s SatisfiabilityAnalysisTime, 29.8s InterpolantComputationTime, 14919 NumberOfCodeBlocks, 14919 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 22936 ConstructedInterpolants, 0 QuantifiedInterpolants, 22269935 SizeOfPredicates, 74 NumberOfNonLiveVariables, 31014 ConjunctsInSsa, 222 ConjunctsInUnsatCore, 67 InterpolantComputations, 14 PerfectInterpolantSequences, 14420/15635 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/Problem03_label51_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-18_10-20-49-079.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label51_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-18_10-20-49-079.csv Completed graceful shutdown