java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label35_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-69f5bdd-m [2018-09-18 11:23:38,539 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-18 11:23:38,541 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-18 11:23:38,553 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-18 11:23:38,554 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-18 11:23:38,555 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-18 11:23:38,556 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-18 11:23:38,558 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-18 11:23:38,559 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-18 11:23:38,560 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-18 11:23:38,561 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-18 11:23:38,561 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-18 11:23:38,562 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-18 11:23:38,563 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-18 11:23:38,564 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-18 11:23:38,565 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-18 11:23:38,566 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-18 11:23:38,568 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-18 11:23:38,570 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-18 11:23:38,572 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-18 11:23:38,573 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-18 11:23:38,575 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-18 11:23:38,577 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-18 11:23:38,578 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-18 11:23:38,578 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-18 11:23:38,579 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-18 11:23:38,580 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-18 11:23:38,581 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-18 11:23:38,582 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-18 11:23:38,583 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-18 11:23:38,583 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-18 11:23:38,584 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-09-18 11:23:38,587 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-18 11:23:38,606 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-18 11:23:38,607 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-18 11:23:38,608 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-18 11:23:38,608 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-18 11:23:38,609 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-18 11:23:38,609 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-18 11:23:38,609 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-18 11:23:38,609 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-18 11:23:38,610 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-18 11:23:38,610 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-18 11:23:38,610 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-09-18 11:23:38,611 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-18 11:23:38,611 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-18 11:23:38,612 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-18 11:23:38,612 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-18 11:23:38,612 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-18 11:23:38,612 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-18 11:23:38,612 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-18 11:23:38,614 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-18 11:23:38,615 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-18 11:23:38,615 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-18 11:23:38,615 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-18 11:23:38,615 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-18 11:23:38,615 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-18 11:23:38,616 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-18 11:23:38,616 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-18 11:23:38,616 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-18 11:23:38,616 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-18 11:23:38,616 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-18 11:23:38,617 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-18 11:23:38,617 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-18 11:23:38,617 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-18 11:23:38,617 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-18 11:23:38,617 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-18 11:23:38,672 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-18 11:23:38,691 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-18 11:23:38,696 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-18 11:23:38,697 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-18 11:23:38,698 INFO L276 PluginConnector]: CDTParser initialized [2018-09-18 11:23:38,699 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label35_true-unreach-call.c [2018-09-18 11:23:39,048 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4266da6a/c4282d2ee3874d0ab2712824aeb74c2a/FLAG8b365dd0b [2018-09-18 11:23:39,356 INFO L277 CDTParser]: Found 1 translation units. [2018-09-18 11:23:39,357 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label35_true-unreach-call.c [2018-09-18 11:23:39,372 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4266da6a/c4282d2ee3874d0ab2712824aeb74c2a/FLAG8b365dd0b [2018-09-18 11:23:39,388 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4266da6a/c4282d2ee3874d0ab2712824aeb74c2a [2018-09-18 11:23:39,399 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-18 11:23:39,402 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-18 11:23:39,404 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-18 11:23:39,404 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-18 11:23:39,411 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-18 11:23:39,412 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 11:23:39" (1/1) ... [2018-09-18 11:23:39,415 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68983f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:23:39, skipping insertion in model container [2018-09-18 11:23:39,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 11:23:39" (1/1) ... [2018-09-18 11:23:39,427 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-18 11:23:40,151 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 11:23:40,169 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-18 11:23:40,366 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 11:23:40,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:23:40 WrapperNode [2018-09-18 11:23:40,444 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-18 11:23:40,445 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-18 11:23:40,445 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-18 11:23:40,445 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-18 11:23:40,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:23:40" (1/1) ... [2018-09-18 11:23:40,500 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:23:40" (1/1) ... [2018-09-18 11:23:40,618 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-18 11:23:40,618 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-18 11:23:40,618 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-18 11:23:40,618 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-18 11:23:40,630 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:23:40" (1/1) ... [2018-09-18 11:23:40,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:23:40" (1/1) ... [2018-09-18 11:23:40,640 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:23:40" (1/1) ... [2018-09-18 11:23:40,641 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:23:40" (1/1) ... [2018-09-18 11:23:40,922 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:23:40" (1/1) ... [2018-09-18 11:23:40,934 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:23:40" (1/1) ... [2018-09-18 11:23:40,948 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:23:40" (1/1) ... [2018-09-18 11:23:40,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-18 11:23:40,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-18 11:23:40,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-18 11:23:40,965 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-18 11:23:40,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:23:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-18 11:23:41,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-18 11:23:41,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-18 11:23:41,028 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-18 11:23:41,028 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-18 11:23:41,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-18 11:23:41,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-18 11:23:41,029 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-18 11:23:41,029 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-18 11:23:45,183 INFO L356 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-18 11:23:45,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 11:23:45 BoogieIcfgContainer [2018-09-18 11:23:45,184 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-18 11:23:45,185 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-18 11:23:45,185 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-18 11:23:45,188 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-18 11:23:45,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 11:23:39" (1/3) ... [2018-09-18 11:23:45,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@89ad866 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 11:23:45, skipping insertion in model container [2018-09-18 11:23:45,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:23:40" (2/3) ... [2018-09-18 11:23:45,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@89ad866 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 11:23:45, skipping insertion in model container [2018-09-18 11:23:45,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 11:23:45" (3/3) ... [2018-09-18 11:23:45,192 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label35_true-unreach-call.c [2018-09-18 11:23:45,202 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-18 11:23:45,212 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-18 11:23:45,271 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-18 11:23:45,272 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-18 11:23:45,272 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-18 11:23:45,272 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-18 11:23:45,272 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-18 11:23:45,273 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-18 11:23:45,273 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-18 11:23:45,273 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-18 11:23:45,273 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-18 11:23:45,308 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states. [2018-09-18 11:23:45,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-18 11:23:45,319 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:23:45,320 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] [2018-09-18 11:23:45,321 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:23:45,327 INFO L82 PathProgramCache]: Analyzing trace with hash 460642553, now seen corresponding path program 1 times [2018-09-18 11:23:45,330 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:23:45,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:23:45,379 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:23:45,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:23:45,379 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:23:45,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:23:45,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:23:45,850 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 11:23:45,851 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-18 11:23:45,851 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:23:45,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-18 11:23:45,873 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-18 11:23:45,873 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 11:23:45,876 INFO L87 Difference]: Start difference. First operand 293 states. Second operand 4 states. [2018-09-18 11:23:49,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:23:49,049 INFO L93 Difference]: Finished difference Result 998 states and 1780 transitions. [2018-09-18 11:23:49,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-18 11:23:49,052 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2018-09-18 11:23:49,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:23:49,075 INFO L225 Difference]: With dead ends: 998 [2018-09-18 11:23:49,075 INFO L226 Difference]: Without dead ends: 699 [2018-09-18 11:23:49,084 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 11:23:49,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2018-09-18 11:23:49,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 693. [2018-09-18 11:23:49,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 693 states. [2018-09-18 11:23:49,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1109 transitions. [2018-09-18 11:23:49,182 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1109 transitions. Word has length 65 [2018-09-18 11:23:49,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:23:49,183 INFO L480 AbstractCegarLoop]: Abstraction has 693 states and 1109 transitions. [2018-09-18 11:23:49,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-18 11:23:49,183 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1109 transitions. [2018-09-18 11:23:49,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-09-18 11:23:49,193 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:23:49,193 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:23:49,194 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:23:49,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1344478420, now seen corresponding path program 1 times [2018-09-18 11:23:49,194 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:23:49,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:23:49,196 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:23:49,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:23:49,196 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:23:49,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:23:49,472 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:23:49,472 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 11:23:49,473 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-18 11:23:49,473 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:23:49,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-18 11:23:49,475 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-18 11:23:49,475 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 11:23:49,476 INFO L87 Difference]: Start difference. First operand 693 states and 1109 transitions. Second operand 4 states. [2018-09-18 11:23:53,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:23:53,820 INFO L93 Difference]: Finished difference Result 2539 states and 4264 transitions. [2018-09-18 11:23:53,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-18 11:23:53,820 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 139 [2018-09-18 11:23:53,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:23:53,835 INFO L225 Difference]: With dead ends: 2539 [2018-09-18 11:23:53,835 INFO L226 Difference]: Without dead ends: 1852 [2018-09-18 11:23:53,842 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 11:23:53,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2018-09-18 11:23:53,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1835. [2018-09-18 11:23:53,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2018-09-18 11:23:53,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2830 transitions. [2018-09-18 11:23:53,942 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2830 transitions. Word has length 139 [2018-09-18 11:23:53,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:23:53,943 INFO L480 AbstractCegarLoop]: Abstraction has 1835 states and 2830 transitions. [2018-09-18 11:23:53,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-18 11:23:53,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2830 transitions. [2018-09-18 11:23:53,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-18 11:23:53,957 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:23:53,957 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:23:53,957 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:23:53,959 INFO L82 PathProgramCache]: Analyzing trace with hash -2061838657, now seen corresponding path program 1 times [2018-09-18 11:23:53,959 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:23:53,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:23:53,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:23:53,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:23:53,960 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:23:54,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:23:54,524 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:23:54,525 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 11:23:54,525 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-18 11:23:54,525 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:23:54,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 11:23:54,526 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 11:23:54,526 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-18 11:23:54,527 INFO L87 Difference]: Start difference. First operand 1835 states and 2830 transitions. Second operand 6 states. [2018-09-18 11:23:59,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:23:59,348 INFO L93 Difference]: Finished difference Result 7366 states and 13526 transitions. [2018-09-18 11:23:59,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-18 11:23:59,348 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 164 [2018-09-18 11:23:59,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:23:59,420 INFO L225 Difference]: With dead ends: 7366 [2018-09-18 11:23:59,421 INFO L226 Difference]: Without dead ends: 5537 [2018-09-18 11:23:59,480 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-09-18 11:23:59,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5537 states. [2018-09-18 11:23:59,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5537 to 4800. [2018-09-18 11:23:59,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4800 states. [2018-09-18 11:23:59,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4800 states to 4800 states and 7124 transitions. [2018-09-18 11:23:59,720 INFO L78 Accepts]: Start accepts. Automaton has 4800 states and 7124 transitions. Word has length 164 [2018-09-18 11:23:59,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:23:59,721 INFO L480 AbstractCegarLoop]: Abstraction has 4800 states and 7124 transitions. [2018-09-18 11:23:59,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 11:23:59,721 INFO L276 IsEmpty]: Start isEmpty. Operand 4800 states and 7124 transitions. [2018-09-18 11:23:59,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-09-18 11:23:59,743 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:23:59,744 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-18 11:23:59,744 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:23:59,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1896930166, now seen corresponding path program 1 times [2018-09-18 11:23:59,745 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:23:59,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:23:59,746 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:23:59,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:23:59,746 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:23:59,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:24:00,095 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-18 11:24:00,095 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 11:24:00,095 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-18 11:24:00,095 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:24:00,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-18 11:24:00,097 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-18 11:24:00,097 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 11:24:00,097 INFO L87 Difference]: Start difference. First operand 4800 states and 7124 transitions. Second operand 4 states. [2018-09-18 11:24:04,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:24:04,232 INFO L93 Difference]: Finished difference Result 12909 states and 21989 transitions. [2018-09-18 11:24:04,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-18 11:24:04,234 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 230 [2018-09-18 11:24:04,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:24:04,290 INFO L225 Difference]: With dead ends: 12909 [2018-09-18 11:24:04,291 INFO L226 Difference]: Without dead ends: 8115 [2018-09-18 11:24:04,340 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 11:24:04,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8115 states. [2018-09-18 11:24:04,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8115 to 7727. [2018-09-18 11:24:04,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7727 states. [2018-09-18 11:24:04,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7727 states to 7727 states and 11241 transitions. [2018-09-18 11:24:04,623 INFO L78 Accepts]: Start accepts. Automaton has 7727 states and 11241 transitions. Word has length 230 [2018-09-18 11:24:04,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:24:04,624 INFO L480 AbstractCegarLoop]: Abstraction has 7727 states and 11241 transitions. [2018-09-18 11:24:04,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-18 11:24:04,625 INFO L276 IsEmpty]: Start isEmpty. Operand 7727 states and 11241 transitions. [2018-09-18 11:24:04,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-09-18 11:24:04,654 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:24:04,654 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-18 11:24:04,654 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:24:04,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1960371396, now seen corresponding path program 1 times [2018-09-18 11:24:04,655 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:24:04,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:24:04,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:24:04,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:24:04,656 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:24:04,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:24:05,271 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 116 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 11:24:05,271 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:24:05,272 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:24:05,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:24:05,281 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:24:05,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:24:05,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:24:05,929 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2018-09-18 11:24:05,929 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:24:06,140 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-09-18 11:24:06,326 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2018-09-18 11:24:07,079 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 116 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 11:24:07,114 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 11:24:07,114 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 11 [2018-09-18 11:24:07,115 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:24:07,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 11:24:07,116 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 11:24:07,116 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-18 11:24:07,116 INFO L87 Difference]: Start difference. First operand 7727 states and 11241 transitions. Second operand 5 states. [2018-09-18 11:24:11,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:24:11,280 INFO L93 Difference]: Finished difference Result 18747 states and 27197 transitions. [2018-09-18 11:24:11,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-18 11:24:11,281 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 234 [2018-09-18 11:24:11,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:24:11,363 INFO L225 Difference]: With dead ends: 18747 [2018-09-18 11:24:11,363 INFO L226 Difference]: Without dead ends: 10831 [2018-09-18 11:24:11,405 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 465 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2018-09-18 11:24:11,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10831 states. [2018-09-18 11:24:11,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10831 to 10811. [2018-09-18 11:24:11,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10811 states. [2018-09-18 11:24:11,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10811 states to 10811 states and 15627 transitions. [2018-09-18 11:24:11,788 INFO L78 Accepts]: Start accepts. Automaton has 10811 states and 15627 transitions. Word has length 234 [2018-09-18 11:24:11,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:24:11,789 INFO L480 AbstractCegarLoop]: Abstraction has 10811 states and 15627 transitions. [2018-09-18 11:24:11,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 11:24:11,789 INFO L276 IsEmpty]: Start isEmpty. Operand 10811 states and 15627 transitions. [2018-09-18 11:24:11,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2018-09-18 11:24:11,819 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:24:11,819 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-18 11:24:11,820 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:24:11,820 INFO L82 PathProgramCache]: Analyzing trace with hash 546111089, now seen corresponding path program 1 times [2018-09-18 11:24:11,820 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:24:11,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:24:11,822 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:24:11,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:24:11,822 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:24:11,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:24:12,091 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 11:24:12,504 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 116 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 11:24:12,504 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:24:12,504 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:24:12,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:24:12,520 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:24:12,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:24:12,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:24:13,026 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2018-09-18 11:24:13,026 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:24:14,023 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 116 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 11:24:14,056 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 11:24:14,057 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-18 11:24:14,057 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:24:14,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 11:24:14,058 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 11:24:14,058 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-18 11:24:14,059 INFO L87 Difference]: Start difference. First operand 10811 states and 15627 transitions. Second operand 5 states. [2018-09-18 11:24:18,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:24:18,903 INFO L93 Difference]: Finished difference Result 26075 states and 38904 transitions. [2018-09-18 11:24:18,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 11:24:18,912 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 280 [2018-09-18 11:24:18,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:24:18,986 INFO L225 Difference]: With dead ends: 26075 [2018-09-18 11:24:18,987 INFO L226 Difference]: Without dead ends: 15270 [2018-09-18 11:24:19,031 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 555 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-09-18 11:24:19,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15270 states. [2018-09-18 11:24:19,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15270 to 15021. [2018-09-18 11:24:19,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15021 states. [2018-09-18 11:24:19,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15021 states to 15021 states and 21142 transitions. [2018-09-18 11:24:19,522 INFO L78 Accepts]: Start accepts. Automaton has 15021 states and 21142 transitions. Word has length 280 [2018-09-18 11:24:19,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:24:19,522 INFO L480 AbstractCegarLoop]: Abstraction has 15021 states and 21142 transitions. [2018-09-18 11:24:19,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 11:24:19,523 INFO L276 IsEmpty]: Start isEmpty. Operand 15021 states and 21142 transitions. [2018-09-18 11:24:19,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2018-09-18 11:24:19,562 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:24:19,562 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:24:19,562 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:24:19,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1348465692, now seen corresponding path program 1 times [2018-09-18 11:24:19,563 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:24:19,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:24:19,564 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:24:19,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:24:19,564 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:24:19,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:24:19,858 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2018-09-18 11:24:19,858 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 11:24:19,858 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-18 11:24:19,859 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:24:19,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 11:24:19,860 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 11:24:19,860 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 11:24:19,860 INFO L87 Difference]: Start difference. First operand 15021 states and 21142 transitions. Second operand 3 states. [2018-09-18 11:24:22,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:24:22,634 INFO L93 Difference]: Finished difference Result 31576 states and 45707 transitions. [2018-09-18 11:24:22,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 11:24:22,634 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 289 [2018-09-18 11:24:22,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:24:22,695 INFO L225 Difference]: With dead ends: 31576 [2018-09-18 11:24:22,695 INFO L226 Difference]: Without dead ends: 16750 [2018-09-18 11:24:22,743 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 11:24:22,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16750 states. [2018-09-18 11:24:23,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16750 to 16748. [2018-09-18 11:24:23,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16748 states. [2018-09-18 11:24:23,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16748 states to 16748 states and 23600 transitions. [2018-09-18 11:24:23,153 INFO L78 Accepts]: Start accepts. Automaton has 16748 states and 23600 transitions. Word has length 289 [2018-09-18 11:24:23,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:24:23,154 INFO L480 AbstractCegarLoop]: Abstraction has 16748 states and 23600 transitions. [2018-09-18 11:24:23,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 11:24:23,155 INFO L276 IsEmpty]: Start isEmpty. Operand 16748 states and 23600 transitions. [2018-09-18 11:24:23,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2018-09-18 11:24:23,197 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:24:23,198 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 11:24:23,198 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:24:23,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1783736515, now seen corresponding path program 1 times [2018-09-18 11:24:23,198 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:24:23,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:24:23,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:24:23,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:24:23,200 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:24:23,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:24:23,855 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 215 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:24:23,856 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:24:23,856 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:24:23,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:24:23,872 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:24:23,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:24:23,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:24:24,244 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-09-18 11:24:24,244 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:24:24,327 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-09-18 11:24:24,348 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-18 11:24:24,348 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-09-18 11:24:24,348 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:24:24,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 11:24:24,349 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 11:24:24,349 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-09-18 11:24:24,350 INFO L87 Difference]: Start difference. First operand 16748 states and 23600 transitions. Second operand 3 states. [2018-09-18 11:24:25,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:24:25,790 INFO L93 Difference]: Finished difference Result 38953 states and 58099 transitions. [2018-09-18 11:24:25,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 11:24:25,790 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 300 [2018-09-18 11:24:25,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:24:25,880 INFO L225 Difference]: With dead ends: 38953 [2018-09-18 11:24:25,880 INFO L226 Difference]: Without dead ends: 22400 [2018-09-18 11:24:25,955 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 600 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-09-18 11:24:25,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22400 states. [2018-09-18 11:24:26,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22400 to 22383. [2018-09-18 11:24:26,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22383 states. [2018-09-18 11:24:26,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22383 states to 22383 states and 30883 transitions. [2018-09-18 11:24:26,530 INFO L78 Accepts]: Start accepts. Automaton has 22383 states and 30883 transitions. Word has length 300 [2018-09-18 11:24:26,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:24:26,530 INFO L480 AbstractCegarLoop]: Abstraction has 22383 states and 30883 transitions. [2018-09-18 11:24:26,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 11:24:26,531 INFO L276 IsEmpty]: Start isEmpty. Operand 22383 states and 30883 transitions. [2018-09-18 11:24:26,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2018-09-18 11:24:26,565 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:24:26,565 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:24:26,565 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:24:26,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1062228098, now seen corresponding path program 1 times [2018-09-18 11:24:26,566 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:24:26,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:24:26,567 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:24:26,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:24:26,567 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:24:26,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:24:27,817 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 2 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:24:27,818 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:24:27,818 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:24:27,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:24:27,827 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:24:27,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:24:27,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:24:28,413 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 209 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:24:28,413 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:24:28,646 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2018-09-18 11:24:29,381 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 117 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:24:29,402 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:24:29,402 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:24:29,422 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:24:29,422 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:24:29,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:24:29,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:24:29,932 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 209 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:24:29,932 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:24:30,851 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 117 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:24:30,853 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:24:30,854 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8, 8, 8] total 36 [2018-09-18 11:24:30,854 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:24:30,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-18 11:24:30,856 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-18 11:24:30,856 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2018-09-18 11:24:30,857 INFO L87 Difference]: Start difference. First operand 22383 states and 30883 transitions. Second operand 21 states. [2018-09-18 11:24:33,771 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 29 [2018-09-18 11:24:35,949 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2018-09-18 11:24:39,405 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2018-09-18 11:24:40,519 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2018-09-18 11:24:45,896 WARN L178 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2018-09-18 11:24:48,924 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2018-09-18 11:24:49,192 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2018-09-18 11:24:49,880 WARN L178 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2018-09-18 11:24:54,889 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2018-09-18 11:24:57,501 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-18 11:25:05,288 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2018-09-18 11:25:06,870 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2018-09-18 11:25:11,373 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2018-09-18 11:25:14,088 WARN L178 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2018-09-18 11:25:19,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:25:19,022 INFO L93 Difference]: Finished difference Result 60304 states and 90586 transitions. [2018-09-18 11:25:19,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2018-09-18 11:25:19,022 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 308 [2018-09-18 11:25:19,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:25:19,204 INFO L225 Difference]: With dead ends: 60304 [2018-09-18 11:25:19,204 INFO L226 Difference]: Without dead ends: 37562 [2018-09-18 11:25:19,318 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1410 GetRequests, 1211 SyntacticMatches, 2 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14551 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=4726, Invalid=34676, Unknown=0, NotChecked=0, Total=39402 [2018-09-18 11:25:19,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37562 states. [2018-09-18 11:25:20,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37562 to 35924. [2018-09-18 11:25:20,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35924 states. [2018-09-18 11:25:20,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35924 states to 35924 states and 48972 transitions. [2018-09-18 11:25:20,334 INFO L78 Accepts]: Start accepts. Automaton has 35924 states and 48972 transitions. Word has length 308 [2018-09-18 11:25:20,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:25:20,335 INFO L480 AbstractCegarLoop]: Abstraction has 35924 states and 48972 transitions. [2018-09-18 11:25:20,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-18 11:25:20,335 INFO L276 IsEmpty]: Start isEmpty. Operand 35924 states and 48972 transitions. [2018-09-18 11:25:20,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2018-09-18 11:25:20,390 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:25:20,391 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:25:20,391 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:25:20,391 INFO L82 PathProgramCache]: Analyzing trace with hash 183799237, now seen corresponding path program 1 times [2018-09-18 11:25:20,392 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:25:20,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:25:20,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:25:20,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:25:20,393 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:25:20,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:25:21,397 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 357 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:25:21,398 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:25:21,398 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:25:21,406 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:25:21,406 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:25:21,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:25:21,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:25:21,875 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 355 proven. 2 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-09-18 11:25:21,875 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:25:22,318 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 355 proven. 2 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-09-18 11:25:22,338 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:25:22,339 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:25:22,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:25:22,354 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:25:22,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:25:22,613 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:25:23,296 WARN L178 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 42 [2018-09-18 11:25:23,446 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2018-09-18 11:25:24,028 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 205 proven. 152 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-09-18 11:25:24,028 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:25:24,134 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2018-09-18 11:25:24,450 WARN L178 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2018-09-18 11:25:25,402 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 189 proven. 172 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-09-18 11:25:25,405 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:25:25,405 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5, 8, 10] total 31 [2018-09-18 11:25:25,406 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:25:25,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-18 11:25:25,407 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-18 11:25:25,407 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2018-09-18 11:25:25,408 INFO L87 Difference]: Start difference. First operand 35924 states and 48972 transitions. Second operand 18 states. [2018-09-18 11:25:29,499 WARN L178 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2018-09-18 11:25:39,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:25:39,587 INFO L93 Difference]: Finished difference Result 76583 states and 117614 transitions. [2018-09-18 11:25:39,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-18 11:25:39,588 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 362 [2018-09-18 11:25:39,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:25:39,774 INFO L225 Difference]: With dead ends: 76583 [2018-09-18 11:25:39,774 INFO L226 Difference]: Without dead ends: 38811 [2018-09-18 11:25:39,922 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1560 GetRequests, 1471 SyntacticMatches, 8 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2042 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1404, Invalid=5402, Unknown=0, NotChecked=0, Total=6806 [2018-09-18 11:25:39,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38811 states. [2018-09-18 11:25:41,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38811 to 37756. [2018-09-18 11:25:41,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37756 states. [2018-09-18 11:25:41,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37756 states to 37756 states and 46906 transitions. [2018-09-18 11:25:41,179 INFO L78 Accepts]: Start accepts. Automaton has 37756 states and 46906 transitions. Word has length 362 [2018-09-18 11:25:41,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:25:41,179 INFO L480 AbstractCegarLoop]: Abstraction has 37756 states and 46906 transitions. [2018-09-18 11:25:41,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-18 11:25:41,179 INFO L276 IsEmpty]: Start isEmpty. Operand 37756 states and 46906 transitions. [2018-09-18 11:25:41,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2018-09-18 11:25:41,219 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:25:41,220 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:25:41,220 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:25:41,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1568235000, now seen corresponding path program 1 times [2018-09-18 11:25:41,221 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:25:41,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:25:41,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:25:41,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:25:41,222 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:25:41,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:25:41,776 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 186 proven. 226 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 11:25:41,777 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:25:41,777 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:25:41,784 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:25:41,785 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:25:41,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:25:41,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:25:42,085 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 356 proven. 2 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2018-09-18 11:25:42,085 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:25:42,276 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2018-09-18 11:25:42,768 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 180 proven. 232 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 11:25:42,790 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:25:42,790 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 10 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 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:25:42,807 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:25:42,807 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:25:43,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:25:43,070 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:25:43,395 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 356 proven. 2 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2018-09-18 11:25:43,396 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:25:43,945 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 251 proven. 73 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-09-18 11:25:43,947 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:25:43,948 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8, 5, 5] total 26 [2018-09-18 11:25:43,948 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:25:43,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-18 11:25:43,950 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-18 11:25:43,950 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2018-09-18 11:25:43,950 INFO L87 Difference]: Start difference. First operand 37756 states and 46906 transitions. Second operand 16 states. [2018-09-18 11:25:54,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:25:54,924 INFO L93 Difference]: Finished difference Result 88505 states and 130691 transitions. [2018-09-18 11:25:54,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-18 11:25:54,924 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 366 [2018-09-18 11:25:54,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:25:55,304 INFO L225 Difference]: With dead ends: 88505 [2018-09-18 11:25:55,304 INFO L226 Difference]: Without dead ends: 49449 [2018-09-18 11:25:55,448 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1555 GetRequests, 1486 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=903, Invalid=3789, Unknown=0, NotChecked=0, Total=4692 [2018-09-18 11:25:55,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49449 states. [2018-09-18 11:25:57,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49449 to 46461. [2018-09-18 11:25:57,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46461 states. [2018-09-18 11:25:57,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46461 states to 46461 states and 58616 transitions. [2018-09-18 11:25:57,181 INFO L78 Accepts]: Start accepts. Automaton has 46461 states and 58616 transitions. Word has length 366 [2018-09-18 11:25:57,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:25:57,182 INFO L480 AbstractCegarLoop]: Abstraction has 46461 states and 58616 transitions. [2018-09-18 11:25:57,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-18 11:25:57,182 INFO L276 IsEmpty]: Start isEmpty. Operand 46461 states and 58616 transitions. [2018-09-18 11:25:57,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2018-09-18 11:25:57,205 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:25:57,205 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:25:57,205 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:25:57,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1614263236, now seen corresponding path program 1 times [2018-09-18 11:25:57,206 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:25:57,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:25:57,206 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:25:57,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:25:57,207 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:25:57,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:25:58,501 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 249 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:25:58,502 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:25:58,502 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 11:25:58,510 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:25:58,510 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:25:58,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:25:58,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:25:59,719 WARN L178 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2018-09-18 11:25:59,816 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 360 proven. 2 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-09-18 11:25:59,816 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:26:00,421 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 360 proven. 2 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-09-18 11:26:00,443 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:26:00,444 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 11:26:00,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:26:00,462 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:26:00,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:26:00,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:26:00,961 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 356 proven. 6 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-09-18 11:26:00,962 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:26:01,493 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 360 proven. 2 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-09-18 11:26:01,495 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:26:01,495 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 5, 5, 5, 5] total 28 [2018-09-18 11:26:01,495 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:26:01,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-18 11:26:01,496 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-18 11:26:01,496 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2018-09-18 11:26:01,497 INFO L87 Difference]: Start difference. First operand 46461 states and 58616 transitions. Second operand 21 states. [2018-09-18 11:26:03,950 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2018-09-18 11:26:06,179 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-09-18 11:26:15,154 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2018-09-18 11:26:16,028 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2018-09-18 11:26:21,178 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2018-09-18 11:26:29,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:26:29,306 INFO L93 Difference]: Finished difference Result 100591 states and 143126 transitions. [2018-09-18 11:26:29,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-18 11:26:29,307 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 367 [2018-09-18 11:26:29,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:26:29,508 INFO L225 Difference]: With dead ends: 100591 [2018-09-18 11:26:29,509 INFO L226 Difference]: Without dead ends: 50727 [2018-09-18 11:26:29,675 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1681 GetRequests, 1542 SyntacticMatches, 2 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6641 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=2868, Invalid=16314, Unknown=0, NotChecked=0, Total=19182 [2018-09-18 11:26:29,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50727 states. [2018-09-18 11:26:30,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50727 to 47761. [2018-09-18 11:26:30,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47761 states. [2018-09-18 11:26:30,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47761 states to 47761 states and 58409 transitions. [2018-09-18 11:26:30,879 INFO L78 Accepts]: Start accepts. Automaton has 47761 states and 58409 transitions. Word has length 367 [2018-09-18 11:26:30,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:26:30,880 INFO L480 AbstractCegarLoop]: Abstraction has 47761 states and 58409 transitions. [2018-09-18 11:26:30,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-18 11:26:30,880 INFO L276 IsEmpty]: Start isEmpty. Operand 47761 states and 58409 transitions. [2018-09-18 11:26:30,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2018-09-18 11:26:30,898 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:26:30,898 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:26:30,899 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:26:30,899 INFO L82 PathProgramCache]: Analyzing trace with hash -747618932, now seen corresponding path program 1 times [2018-09-18 11:26:30,899 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:26:30,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:26:30,900 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:26:30,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:26:30,900 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:26:30,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:26:31,346 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 180 proven. 186 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-09-18 11:26:31,346 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:26:31,346 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 11:26:31,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:26:31,354 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:26:31,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:26:31,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:26:38,330 WARN L178 SmtUtils]: Spent 6.49 s on a formula simplification. DAG size of input: 508 DAG size of output: 26 [2018-09-18 11:26:40,977 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 176 proven. 191 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-09-18 11:26:40,977 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:26:41,793 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 365 proven. 2 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-09-18 11:26:41,814 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:26:41,814 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 14 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 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:26:41,830 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:26:41,830 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:26:42,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:26:42,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:26:50,588 WARN L178 SmtUtils]: Spent 8.22 s on a formula simplification. DAG size of input: 508 DAG size of output: 26 [2018-09-18 11:26:54,774 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 176 proven. 191 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-09-18 11:26:54,774 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:26:55,510 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 365 proven. 2 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-09-18 11:26:55,512 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:26:55,513 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 5, 8, 5] total 21 [2018-09-18 11:26:55,513 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:26:55,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-18 11:26:55,514 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-18 11:26:55,514 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=342, Unknown=3, NotChecked=0, Total=420 [2018-09-18 11:26:55,514 INFO L87 Difference]: Start difference. First operand 47761 states and 58409 transitions. Second operand 13 states. [2018-09-18 11:27:02,153 WARN L178 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 42 DAG size of output: 41 Received shutdown request... [2018-09-18 11:27:38,646 WARN L186 SmtUtils]: Removed 6 from assertion stack [2018-09-18 11:27:38,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-18 11:27:38,647 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-18 11:27:38,655 WARN L206 ceAbstractionStarter]: Timeout [2018-09-18 11:27:38,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.09 11:27:38 BoogieIcfgContainer [2018-09-18 11:27:38,655 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-18 11:27:38,657 INFO L168 Benchmark]: Toolchain (without parser) took 239256.71 ms. Allocated memory was 1.5 GB in the beginning and 3.9 GB in the end (delta: 2.3 GB). Free memory was 1.4 GB in the beginning and 3.1 GB in the end (delta: -1.7 GB). Peak memory consumption was 604.1 MB. Max. memory is 7.1 GB. [2018-09-18 11:27:38,658 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-18 11:27:38,658 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1040.54 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: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. [2018-09-18 11:27:38,659 INFO L168 Benchmark]: Boogie Procedure Inliner took 173.23 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: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-18 11:27:38,660 INFO L168 Benchmark]: Boogie Preprocessor took 346.15 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 816.3 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -942.2 MB). Peak memory consumption was 51.5 MB. Max. memory is 7.1 GB. [2018-09-18 11:27:38,661 INFO L168 Benchmark]: RCFGBuilder took 4219.27 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 168.4 MB). Peak memory consumption was 168.4 MB. Max. memory is 7.1 GB. [2018-09-18 11:27:38,661 INFO L168 Benchmark]: TraceAbstraction took 233470.87 ms. Allocated memory was 2.3 GB in the beginning and 3.9 GB in the end (delta: 1.5 GB). Free memory was 2.1 GB in the beginning and 3.1 GB in the end (delta: -1.0 GB). Peak memory consumption was 477.0 MB. Max. memory is 7.1 GB. [2018-09-18 11:27:38,666 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1040.54 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: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 173.23 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: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 346.15 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 816.3 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -942.2 MB). Peak memory consumption was 51.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4219.27 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 168.4 MB). Peak memory consumption was 168.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 233470.87 ms. Allocated memory was 2.3 GB in the beginning and 3.9 GB in the end (delta: 1.5 GB). Free memory was 2.1 GB in the beginning and 3.1 GB in the end (delta: -1.0 GB). Peak memory consumption was 477.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 180]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 180). Cancelled while BasicCegarLoop was constructing difference of abstraction (47761states) and FLOYD_HOARE automaton (currently 61 states, 13 states before enhancement), while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 19. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 293 locations, 1 error locations. TIMEOUT Result, 233.3s OverallTime, 13 OverallIterations, 4 TraceHistogramMax, 176.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2991 SDtfs, 38815 SDslu, 6031 SDs, 0 SdLazy, 67634 SolverSat, 13169 SolverUnsat, 13 SolverUnknown, 0 SolverNotchecked, 118.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9521 GetRequests, 8894 SyntacticMatches, 23 SemanticMatches, 603 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26438 ImplicationChecksByTransitivity, 64.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47761occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 7.7s AutomataMinimizationTime, 12 MinimizatonAttempts, 10083 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 2.2s SatisfiabilityAnalysisTime, 43.2s InterpolantComputationTime, 7861 NumberOfCodeBlocks, 7861 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 12200 ConstructedInterpolants, 28 QuantifiedInterpolants, 29126403 SizeOfPredicates, 42 NumberOfNonLiveVariables, 7382 ConjunctsInSsa, 184 ConjunctsInUnsatCore, 39 InterpolantComputations, 9 PerfectInterpolantSequences, 9807/12213 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem11_label35_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-18_11-27-38-680.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem11_label35_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-18_11-27-38-680.csv Completed graceful shutdown