java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/psyco/psyco_abp_1_true-unreach-call_false-termination_true-no-overflow.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 15:18:16,301 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 15:18:16,303 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 15:18:16,316 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 15:18:16,316 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 15:18:16,317 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 15:18:16,319 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 15:18:16,321 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 15:18:16,324 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 15:18:16,326 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 15:18:16,327 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 15:18:16,328 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 15:18:16,336 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 15:18:16,337 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 15:18:16,338 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 15:18:16,339 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 15:18:16,341 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 15:18:16,344 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 15:18:16,346 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 15:18:16,348 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 15:18:16,349 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 15:18:16,350 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 15:18:16,352 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 15:18:16,352 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 15:18:16,353 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 15:18:16,353 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 15:18:16,354 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 15:18:16,355 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 15:18:16,356 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 15:18:16,357 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 15:18:16,357 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 15:18:16,358 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-07-24 15:18:16,360 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 [2018-07-24 15:18:16,378 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 15:18:16,379 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 15:18:16,380 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 15:18:16,381 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 15:18:16,381 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 15:18:16,381 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 15:18:16,381 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 15:18:16,381 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 15:18:16,382 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 15:18:16,382 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 15:18:16,382 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 15:18:16,383 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 15:18:16,383 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 15:18:16,383 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 15:18:16,384 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 15:18:16,384 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 15:18:16,384 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 15:18:16,384 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 15:18:16,384 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 15:18:16,384 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 15:18:16,385 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 15:18:16,385 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 15:18:16,385 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 15:18:16,387 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 15:18:16,387 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 15:18:16,387 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 15:18:16,388 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 15:18:16,388 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 15:18:16,388 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 15:18:16,388 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 15:18:16,388 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 15:18:16,388 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 15:18:16,389 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 15:18:16,458 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 15:18:16,472 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 15:18:16,477 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 15:18:16,479 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 15:18:16,480 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 15:18:16,480 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/psyco/psyco_abp_1_true-unreach-call_false-termination_true-no-overflow.c [2018-07-24 15:18:16,836 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e645b510/a94308a041bb416b942d6d2057262bc0/FLAGf2969522d [2018-07-24 15:18:17,033 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 15:18:17,034 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/psyco/psyco_abp_1_true-unreach-call_false-termination_true-no-overflow.c [2018-07-24 15:18:17,048 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e645b510/a94308a041bb416b942d6d2057262bc0/FLAGf2969522d [2018-07-24 15:18:17,064 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e645b510/a94308a041bb416b942d6d2057262bc0 [2018-07-24 15:18:17,074 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 15:18:17,075 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 15:18:17,076 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 15:18:17,076 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 15:18:17,083 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 15:18:17,084 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 03:18:17" (1/1) ... [2018-07-24 15:18:17,086 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5898fe7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 03:18:17, skipping insertion in model container [2018-07-24 15:18:17,087 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 03:18:17" (1/1) ... [2018-07-24 15:18:17,307 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 15:18:17,546 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 15:18:17,572 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 15:18:17,679 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 15:18:17,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 03:18:17 WrapperNode [2018-07-24 15:18:17,726 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 15:18:17,727 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 15:18:17,727 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 15:18:17,727 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 15:18:17,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 03:18:17" (1/1) ... [2018-07-24 15:18:17,751 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 03:18:17" (1/1) ... [2018-07-24 15:18:17,759 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 15:18:17,759 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 15:18:17,760 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 15:18:17,760 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 15:18:17,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 03:18:17" (1/1) ... [2018-07-24 15:18:17,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 03:18:17" (1/1) ... [2018-07-24 15:18:17,773 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 03:18:17" (1/1) ... [2018-07-24 15:18:17,773 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 03:18:17" (1/1) ... [2018-07-24 15:18:17,789 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 03:18:17" (1/1) ... [2018-07-24 15:18:17,800 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 03:18:17" (1/1) ... [2018-07-24 15:18:17,807 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 03:18:17" (1/1) ... [2018-07-24 15:18:17,819 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 15:18:17,822 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 15:18:17,823 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 15:18:17,823 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 15:18:17,824 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 03:18:17" (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 [2018-07-24 15:18:17,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 15:18:17,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 15:18:17,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 15:18:17,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 15:18:17,992 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 15:18:17,992 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 15:18:19,939 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 15:18:19,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 03:18:19 BoogieIcfgContainer [2018-07-24 15:18:19,940 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 15:18:19,941 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 15:18:19,941 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 15:18:19,945 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 15:18:19,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 03:18:17" (1/3) ... [2018-07-24 15:18:19,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57e7cae4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 03:18:19, skipping insertion in model container [2018-07-24 15:18:19,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 03:18:17" (2/3) ... [2018-07-24 15:18:19,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57e7cae4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 03:18:19, skipping insertion in model container [2018-07-24 15:18:19,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 03:18:19" (3/3) ... [2018-07-24 15:18:19,949 INFO L112 eAbstractionObserver]: Analyzing ICFG psyco_abp_1_true-unreach-call_false-termination_true-no-overflow.c [2018-07-24 15:18:19,961 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 15:18:19,971 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 15:18:20,028 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 15:18:20,029 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 15:18:20,030 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 15:18:20,030 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 15:18:20,030 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 15:18:20,030 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 15:18:20,031 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 15:18:20,031 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 15:18:20,031 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 15:18:20,055 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states. [2018-07-24 15:18:20,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-07-24 15:18:20,063 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:18:20,064 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 15:18:20,065 INFO L414 AbstractCegarLoop]: === Iteration 1 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:18:20,070 INFO L82 PathProgramCache]: Analyzing trace with hash -784715869, now seen corresponding path program 1 times [2018-07-24 15:18:20,074 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:18:20,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:20,139 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:18:20,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:20,139 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:18:20,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:18:20,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:18:20,248 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 15:18:20,249 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-07-24 15:18:20,249 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 15:18:20,255 INFO L450 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-07-24 15:18:20,271 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-07-24 15:18:20,272 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-07-24 15:18:20,275 INFO L87 Difference]: Start difference. First operand 114 states. Second operand 2 states. [2018-07-24 15:18:20,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:18:20,323 INFO L93 Difference]: Finished difference Result 222 states and 422 transitions. [2018-07-24 15:18:20,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-07-24 15:18:20,325 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2018-07-24 15:18:20,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:18:20,345 INFO L225 Difference]: With dead ends: 222 [2018-07-24 15:18:20,345 INFO L226 Difference]: Without dead ends: 104 [2018-07-24 15:18:20,355 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-07-24 15:18:20,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-07-24 15:18:20,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-07-24 15:18:20,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-07-24 15:18:20,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 169 transitions. [2018-07-24 15:18:20,421 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 169 transitions. Word has length 13 [2018-07-24 15:18:20,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:18:20,422 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 169 transitions. [2018-07-24 15:18:20,422 INFO L472 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-07-24 15:18:20,422 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 169 transitions. [2018-07-24 15:18:20,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-07-24 15:18:20,424 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:18:20,424 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 15:18:20,425 INFO L414 AbstractCegarLoop]: === Iteration 2 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:18:20,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1976099357, now seen corresponding path program 1 times [2018-07-24 15:18:20,425 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:18:20,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:20,428 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:18:20,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:20,428 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:18:20,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:18:20,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:18:20,565 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 15:18:20,566 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 15:18:20,566 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 15:18:20,569 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 15:18:20,569 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 15:18:20,570 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 15:18:20,570 INFO L87 Difference]: Start difference. First operand 104 states and 169 transitions. Second operand 3 states. [2018-07-24 15:18:20,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:18:20,754 INFO L93 Difference]: Finished difference Result 205 states and 336 transitions. [2018-07-24 15:18:20,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 15:18:20,755 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2018-07-24 15:18:20,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:18:20,757 INFO L225 Difference]: With dead ends: 205 [2018-07-24 15:18:20,757 INFO L226 Difference]: Without dead ends: 107 [2018-07-24 15:18:20,759 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 15:18:20,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-07-24 15:18:20,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-07-24 15:18:20,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-07-24 15:18:20,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 172 transitions. [2018-07-24 15:18:20,771 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 172 transitions. Word has length 14 [2018-07-24 15:18:20,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:18:20,772 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 172 transitions. [2018-07-24 15:18:20,772 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 15:18:20,772 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 172 transitions. [2018-07-24 15:18:20,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-07-24 15:18:20,773 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:18:20,773 INFO L353 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 15:18:20,774 INFO L414 AbstractCegarLoop]: === Iteration 3 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:18:20,774 INFO L82 PathProgramCache]: Analyzing trace with hash 645002054, now seen corresponding path program 1 times [2018-07-24 15:18:20,774 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:18:20,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:20,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:18:20,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:20,776 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:18:20,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:18:20,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:18:20,931 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 15:18:20,931 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 15:18:20,931 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 15:18:20,932 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 15:18:20,932 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 15:18:20,932 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 15:18:20,932 INFO L87 Difference]: Start difference. First operand 107 states and 172 transitions. Second operand 3 states. [2018-07-24 15:18:21,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:18:21,569 INFO L93 Difference]: Finished difference Result 209 states and 338 transitions. [2018-07-24 15:18:21,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 15:18:21,570 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2018-07-24 15:18:21,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:18:21,572 INFO L225 Difference]: With dead ends: 209 [2018-07-24 15:18:21,573 INFO L226 Difference]: Without dead ends: 190 [2018-07-24 15:18:21,577 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 15:18:21,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-07-24 15:18:21,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 176. [2018-07-24 15:18:21,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-07-24 15:18:21,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 285 transitions. [2018-07-24 15:18:21,604 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 285 transitions. Word has length 19 [2018-07-24 15:18:21,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:18:21,604 INFO L471 AbstractCegarLoop]: Abstraction has 176 states and 285 transitions. [2018-07-24 15:18:21,604 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 15:18:21,604 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 285 transitions. [2018-07-24 15:18:21,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-07-24 15:18:21,606 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:18:21,606 INFO L353 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 15:18:21,606 INFO L414 AbstractCegarLoop]: === Iteration 4 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:18:21,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1271474490, now seen corresponding path program 1 times [2018-07-24 15:18:21,607 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:18:21,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:21,608 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:18:21,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:21,608 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:18:21,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:18:21,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:18:21,692 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 15:18:21,692 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 15:18:21,692 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 15:18:21,693 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 15:18:21,693 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 15:18:21,693 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 15:18:21,694 INFO L87 Difference]: Start difference. First operand 176 states and 285 transitions. Second operand 3 states. [2018-07-24 15:18:21,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:18:21,772 INFO L93 Difference]: Finished difference Result 297 states and 481 transitions. [2018-07-24 15:18:21,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 15:18:21,773 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2018-07-24 15:18:21,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:18:21,775 INFO L225 Difference]: With dead ends: 297 [2018-07-24 15:18:21,775 INFO L226 Difference]: Without dead ends: 128 [2018-07-24 15:18:21,777 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 15:18:21,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-07-24 15:18:21,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2018-07-24 15:18:21,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-07-24 15:18:21,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 198 transitions. [2018-07-24 15:18:21,788 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 198 transitions. Word has length 20 [2018-07-24 15:18:21,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:18:21,788 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 198 transitions. [2018-07-24 15:18:21,788 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 15:18:21,788 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 198 transitions. [2018-07-24 15:18:21,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-07-24 15:18:21,790 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:18:21,790 INFO L353 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 15:18:21,790 INFO L414 AbstractCegarLoop]: === Iteration 5 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:18:21,790 INFO L82 PathProgramCache]: Analyzing trace with hash -2078068567, now seen corresponding path program 1 times [2018-07-24 15:18:21,791 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:18:21,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:21,792 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:18:21,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:21,792 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:18:21,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:18:21,889 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-07-24 15:18:21,890 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 15:18:21,890 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 15:18:21,890 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 15:18:21,890 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 15:18:21,891 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 15:18:21,891 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 15:18:21,891 INFO L87 Difference]: Start difference. First operand 126 states and 198 transitions. Second operand 3 states. [2018-07-24 15:18:22,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:18:22,005 INFO L93 Difference]: Finished difference Result 230 states and 362 transitions. [2018-07-24 15:18:22,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 15:18:22,006 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2018-07-24 15:18:22,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:18:22,007 INFO L225 Difference]: With dead ends: 230 [2018-07-24 15:18:22,007 INFO L226 Difference]: Without dead ends: 111 [2018-07-24 15:18:22,009 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 15:18:22,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-07-24 15:18:22,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2018-07-24 15:18:22,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-07-24 15:18:22,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 167 transitions. [2018-07-24 15:18:22,030 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 167 transitions. Word has length 25 [2018-07-24 15:18:22,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:18:22,030 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 167 transitions. [2018-07-24 15:18:22,030 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 15:18:22,030 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 167 transitions. [2018-07-24 15:18:22,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-07-24 15:18:22,032 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:18:22,032 INFO L353 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 15:18:22,032 INFO L414 AbstractCegarLoop]: === Iteration 6 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:18:22,032 INFO L82 PathProgramCache]: Analyzing trace with hash -2048080470, now seen corresponding path program 1 times [2018-07-24 15:18:22,033 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:18:22,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:22,034 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:18:22,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:22,034 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:18:22,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:18:22,140 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:18:22,141 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:18:22,141 INFO L191 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 [2018-07-24 15:18:22,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:18:22,158 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:18:22,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:18:22,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:18:22,283 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:18:22,283 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:18:22,437 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:18:22,459 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:18:22,459 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 15:18:22,479 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:18:22,479 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:18:22,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:18:22,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:18:22,642 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:18:22,642 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:18:22,678 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:18:22,680 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 15:18:22,680 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4] total 6 [2018-07-24 15:18:22,680 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 15:18:22,680 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 15:18:22,681 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 15:18:22,681 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-07-24 15:18:22,682 INFO L87 Difference]: Start difference. First operand 109 states and 167 transitions. Second operand 4 states. [2018-07-24 15:18:23,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:18:23,217 INFO L93 Difference]: Finished difference Result 192 states and 299 transitions. [2018-07-24 15:18:23,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 15:18:23,219 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2018-07-24 15:18:23,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:18:23,222 INFO L225 Difference]: With dead ends: 192 [2018-07-24 15:18:23,222 INFO L226 Difference]: Without dead ends: 174 [2018-07-24 15:18:23,223 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-07-24 15:18:23,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-07-24 15:18:23,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2018-07-24 15:18:23,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-07-24 15:18:23,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 265 transitions. [2018-07-24 15:18:23,234 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 265 transitions. Word has length 27 [2018-07-24 15:18:23,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:18:23,234 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 265 transitions. [2018-07-24 15:18:23,234 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 15:18:23,234 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 265 transitions. [2018-07-24 15:18:23,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-07-24 15:18:23,235 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:18:23,236 INFO L353 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 15:18:23,236 INFO L414 AbstractCegarLoop]: === Iteration 7 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:18:23,236 INFO L82 PathProgramCache]: Analyzing trace with hash 945458420, now seen corresponding path program 1 times [2018-07-24 15:18:23,236 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:18:23,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:23,237 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:18:23,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:23,238 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:18:23,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:18:23,415 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:18:23,415 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:18:23,416 INFO L191 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 [2018-07-24 15:18:23,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:18:23,433 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:18:23,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:18:23,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:18:23,690 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:18:23,690 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:18:23,977 WARN L169 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 13 [2018-07-24 15:18:24,186 WARN L169 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 19 [2018-07-24 15:18:24,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-07-24 15:18:24,266 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 15:18:24,267 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 5] total 7 [2018-07-24 15:18:24,267 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 15:18:24,267 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 15:18:24,268 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 15:18:24,268 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-07-24 15:18:24,268 INFO L87 Difference]: Start difference. First operand 172 states and 265 transitions. Second operand 4 states. [2018-07-24 15:18:25,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:18:25,013 INFO L93 Difference]: Finished difference Result 289 states and 444 transitions. [2018-07-24 15:18:25,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-24 15:18:25,013 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2018-07-24 15:18:25,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:18:25,016 INFO L225 Difference]: With dead ends: 289 [2018-07-24 15:18:25,016 INFO L226 Difference]: Without dead ends: 280 [2018-07-24 15:18:25,017 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-07-24 15:18:25,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2018-07-24 15:18:25,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 262. [2018-07-24 15:18:25,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2018-07-24 15:18:25,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 408 transitions. [2018-07-24 15:18:25,032 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 408 transitions. Word has length 28 [2018-07-24 15:18:25,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:18:25,032 INFO L471 AbstractCegarLoop]: Abstraction has 262 states and 408 transitions. [2018-07-24 15:18:25,032 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 15:18:25,033 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 408 transitions. [2018-07-24 15:18:25,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-07-24 15:18:25,034 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:18:25,034 INFO L353 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 15:18:25,034 INFO L414 AbstractCegarLoop]: === Iteration 8 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:18:25,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1709359769, now seen corresponding path program 1 times [2018-07-24 15:18:25,035 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:18:25,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:25,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:18:25,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:25,036 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:18:25,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:18:25,127 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-07-24 15:18:25,128 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 15:18:25,128 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 15:18:25,128 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 15:18:25,129 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 15:18:25,129 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 15:18:25,129 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 15:18:25,130 INFO L87 Difference]: Start difference. First operand 262 states and 408 transitions. Second operand 3 states. [2018-07-24 15:18:25,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:18:25,206 INFO L93 Difference]: Finished difference Result 454 states and 703 transitions. [2018-07-24 15:18:25,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 15:18:25,207 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2018-07-24 15:18:25,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:18:25,209 INFO L225 Difference]: With dead ends: 454 [2018-07-24 15:18:25,209 INFO L226 Difference]: Without dead ends: 220 [2018-07-24 15:18:25,210 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 15:18:25,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2018-07-24 15:18:25,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 218. [2018-07-24 15:18:25,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2018-07-24 15:18:25,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 326 transitions. [2018-07-24 15:18:25,222 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 326 transitions. Word has length 29 [2018-07-24 15:18:25,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:18:25,222 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 326 transitions. [2018-07-24 15:18:25,223 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 15:18:25,223 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 326 transitions. [2018-07-24 15:18:25,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-07-24 15:18:25,224 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:18:25,224 INFO L353 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 15:18:25,224 INFO L414 AbstractCegarLoop]: === Iteration 9 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:18:25,225 INFO L82 PathProgramCache]: Analyzing trace with hash -847629460, now seen corresponding path program 1 times [2018-07-24 15:18:25,225 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:18:25,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:25,226 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:18:25,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:25,226 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:18:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:18:25,823 WARN L169 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 13 [2018-07-24 15:18:25,828 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:18:25,828 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:18:25,828 INFO L191 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 [2018-07-24 15:18:25,843 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:18:25,844 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:18:25,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:18:25,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:18:25,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-07-24 15:18:25,948 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:18:26,062 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-07-24 15:18:26,083 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 15:18:26,083 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2018-07-24 15:18:26,083 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 15:18:26,084 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 15:18:26,084 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 15:18:26,084 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-07-24 15:18:26,085 INFO L87 Difference]: Start difference. First operand 218 states and 326 transitions. Second operand 3 states. [2018-07-24 15:18:26,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:18:26,132 INFO L93 Difference]: Finished difference Result 221 states and 328 transitions. [2018-07-24 15:18:26,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 15:18:26,132 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2018-07-24 15:18:26,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:18:26,134 INFO L225 Difference]: With dead ends: 221 [2018-07-24 15:18:26,135 INFO L226 Difference]: Without dead ends: 215 [2018-07-24 15:18:26,135 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-07-24 15:18:26,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-07-24 15:18:26,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 214. [2018-07-24 15:18:26,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-07-24 15:18:26,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 317 transitions. [2018-07-24 15:18:26,146 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 317 transitions. Word has length 31 [2018-07-24 15:18:26,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:18:26,147 INFO L471 AbstractCegarLoop]: Abstraction has 214 states and 317 transitions. [2018-07-24 15:18:26,147 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 15:18:26,147 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 317 transitions. [2018-07-24 15:18:26,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-07-24 15:18:26,149 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:18:26,149 INFO L353 BasicCegarLoop]: trace histogram [4, 3, 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] [2018-07-24 15:18:26,149 INFO L414 AbstractCegarLoop]: === Iteration 10 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:18:26,150 INFO L82 PathProgramCache]: Analyzing trace with hash -592457384, now seen corresponding path program 1 times [2018-07-24 15:18:26,150 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:18:26,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:26,151 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:18:26,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:26,151 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:18:26,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:18:26,247 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-07-24 15:18:26,247 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 15:18:26,247 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 15:18:26,248 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 15:18:26,248 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 15:18:26,248 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 15:18:26,248 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 15:18:26,249 INFO L87 Difference]: Start difference. First operand 214 states and 317 transitions. Second operand 3 states. [2018-07-24 15:18:26,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:18:26,505 INFO L93 Difference]: Finished difference Result 363 states and 541 transitions. [2018-07-24 15:18:26,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 15:18:26,505 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2018-07-24 15:18:26,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:18:26,507 INFO L225 Difference]: With dead ends: 363 [2018-07-24 15:18:26,507 INFO L226 Difference]: Without dead ends: 177 [2018-07-24 15:18:26,508 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 15:18:26,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-07-24 15:18:26,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 175. [2018-07-24 15:18:26,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-07-24 15:18:26,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 257 transitions. [2018-07-24 15:18:26,517 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 257 transitions. Word has length 36 [2018-07-24 15:18:26,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:18:26,517 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 257 transitions. [2018-07-24 15:18:26,517 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 15:18:26,517 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 257 transitions. [2018-07-24 15:18:26,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-07-24 15:18:26,519 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:18:26,519 INFO L353 BasicCegarLoop]: trace histogram [4, 3, 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] [2018-07-24 15:18:26,519 INFO L414 AbstractCegarLoop]: === Iteration 11 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:18:26,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1564943497, now seen corresponding path program 1 times [2018-07-24 15:18:26,520 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:18:26,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:26,521 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:18:26,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:26,521 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:18:26,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:18:26,767 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 15:18:26,768 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:18:26,768 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 15:18:26,776 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:18:26,777 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:18:26,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:18:26,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:18:27,045 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 15:18:27,046 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:18:27,384 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 15:18:27,415 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:18:27,415 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 15:18:27,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:18:27,445 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:18:27,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:18:27,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:18:27,648 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 15:18:27,648 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:18:27,907 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 15:18:27,908 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 15:18:27,909 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4] total 7 [2018-07-24 15:18:27,909 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 15:18:27,910 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 15:18:27,910 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 15:18:27,910 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-07-24 15:18:27,911 INFO L87 Difference]: Start difference. First operand 175 states and 257 transitions. Second operand 5 states. [2018-07-24 15:18:28,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:18:28,184 INFO L93 Difference]: Finished difference Result 252 states and 370 transitions. [2018-07-24 15:18:28,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-24 15:18:28,184 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2018-07-24 15:18:28,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:18:28,187 INFO L225 Difference]: With dead ends: 252 [2018-07-24 15:18:28,187 INFO L226 Difference]: Without dead ends: 247 [2018-07-24 15:18:28,187 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 142 SyntacticMatches, 6 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-07-24 15:18:28,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2018-07-24 15:18:28,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 241. [2018-07-24 15:18:28,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-07-24 15:18:28,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 356 transitions. [2018-07-24 15:18:28,198 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 356 transitions. Word has length 37 [2018-07-24 15:18:28,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:18:28,198 INFO L471 AbstractCegarLoop]: Abstraction has 241 states and 356 transitions. [2018-07-24 15:18:28,198 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 15:18:28,199 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 356 transitions. [2018-07-24 15:18:28,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-07-24 15:18:28,200 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:18:28,200 INFO L353 BasicCegarLoop]: trace histogram [4, 3, 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] [2018-07-24 15:18:28,200 INFO L414 AbstractCegarLoop]: === Iteration 12 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:18:28,201 INFO L82 PathProgramCache]: Analyzing trace with hash 2138202118, now seen corresponding path program 1 times [2018-07-24 15:18:28,201 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:18:28,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:28,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:18:28,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:28,202 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:18:28,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:18:28,425 WARN L169 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-07-24 15:18:28,601 WARN L169 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-07-24 15:18:28,796 WARN L169 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-07-24 15:18:28,800 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:18:28,801 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:18:28,801 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 15:18:28,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:18:28,813 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:18:28,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:18:28,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:18:29,015 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:18:29,015 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:18:29,426 WARN L169 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 26 [2018-07-24 15:18:29,866 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:18:29,888 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:18:29,888 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 15:18:29,931 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:18:29,931 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:18:30,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:18:30,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:18:30,159 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:18:30,159 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:18:30,475 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:18:30,477 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 15:18:30,477 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6, 5, 5] total 11 [2018-07-24 15:18:30,477 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 15:18:30,478 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 15:18:30,478 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 15:18:30,478 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-07-24 15:18:30,478 INFO L87 Difference]: Start difference. First operand 241 states and 356 transitions. Second operand 6 states. [2018-07-24 15:18:30,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:18:30,883 INFO L93 Difference]: Finished difference Result 251 states and 365 transitions. [2018-07-24 15:18:30,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 15:18:30,889 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2018-07-24 15:18:30,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:18:30,890 INFO L225 Difference]: With dead ends: 251 [2018-07-24 15:18:30,891 INFO L226 Difference]: Without dead ends: 249 [2018-07-24 15:18:30,891 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 150 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-07-24 15:18:30,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-07-24 15:18:30,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 242. [2018-07-24 15:18:30,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2018-07-24 15:18:30,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 357 transitions. [2018-07-24 15:18:30,901 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 357 transitions. Word has length 40 [2018-07-24 15:18:30,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:18:30,901 INFO L471 AbstractCegarLoop]: Abstraction has 242 states and 357 transitions. [2018-07-24 15:18:30,901 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 15:18:30,902 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 357 transitions. [2018-07-24 15:18:30,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-07-24 15:18:30,902 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:18:30,902 INFO L353 BasicCegarLoop]: trace histogram [4, 3, 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] [2018-07-24 15:18:30,903 INFO L414 AbstractCegarLoop]: === Iteration 13 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:18:30,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1984993975, now seen corresponding path program 1 times [2018-07-24 15:18:30,903 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:18:30,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:30,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:18:30,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:30,904 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:18:30,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:18:30,973 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-07-24 15:18:30,973 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 15:18:30,973 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 15:18:30,973 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 15:18:30,974 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 15:18:30,974 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 15:18:30,974 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 15:18:30,974 INFO L87 Difference]: Start difference. First operand 242 states and 357 transitions. Second operand 3 states. [2018-07-24 15:18:31,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:18:31,130 INFO L93 Difference]: Finished difference Result 422 states and 620 transitions. [2018-07-24 15:18:31,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 15:18:31,130 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2018-07-24 15:18:31,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:18:31,132 INFO L225 Difference]: With dead ends: 422 [2018-07-24 15:18:31,132 INFO L226 Difference]: Without dead ends: 226 [2018-07-24 15:18:31,133 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 15:18:31,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-07-24 15:18:31,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 224. [2018-07-24 15:18:31,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-07-24 15:18:31,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 320 transitions. [2018-07-24 15:18:31,142 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 320 transitions. Word has length 41 [2018-07-24 15:18:31,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:18:31,142 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 320 transitions. [2018-07-24 15:18:31,142 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 15:18:31,143 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 320 transitions. [2018-07-24 15:18:31,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-07-24 15:18:31,143 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:18:31,145 INFO L353 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 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] [2018-07-24 15:18:31,145 INFO L414 AbstractCegarLoop]: === Iteration 14 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:18:31,146 INFO L82 PathProgramCache]: Analyzing trace with hash -636700121, now seen corresponding path program 1 times [2018-07-24 15:18:31,146 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:18:31,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:31,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:18:31,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:31,150 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:18:31,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:18:31,245 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-07-24 15:18:31,245 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 15:18:31,245 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 15:18:31,245 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 15:18:31,246 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 15:18:31,246 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 15:18:31,246 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 15:18:31,247 INFO L87 Difference]: Start difference. First operand 224 states and 320 transitions. Second operand 3 states. [2018-07-24 15:18:31,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:18:31,500 INFO L93 Difference]: Finished difference Result 305 states and 435 transitions. [2018-07-24 15:18:31,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 15:18:31,501 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2018-07-24 15:18:31,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:18:31,502 INFO L225 Difference]: With dead ends: 305 [2018-07-24 15:18:31,502 INFO L226 Difference]: Without dead ends: 146 [2018-07-24 15:18:31,503 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 15:18:31,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-07-24 15:18:31,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2018-07-24 15:18:31,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-07-24 15:18:31,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 200 transitions. [2018-07-24 15:18:31,510 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 200 transitions. Word has length 50 [2018-07-24 15:18:31,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:18:31,510 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 200 transitions. [2018-07-24 15:18:31,511 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 15:18:31,511 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 200 transitions. [2018-07-24 15:18:31,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-07-24 15:18:31,511 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:18:31,512 INFO L353 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 15:18:31,512 INFO L414 AbstractCegarLoop]: === Iteration 15 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:18:31,512 INFO L82 PathProgramCache]: Analyzing trace with hash 783335988, now seen corresponding path program 1 times [2018-07-24 15:18:31,512 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:18:31,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:31,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:18:31,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:31,515 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:18:31,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:18:31,909 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 15:18:31,910 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:18:31,910 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 15:18:31,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:18:31,924 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:18:31,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:18:31,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:18:32,489 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:18:32,490 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:18:32,586 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:18:32,607 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:18:32,607 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 15:18:32,624 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:18:32,625 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:18:32,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:18:32,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:18:32,788 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 15:18:32,789 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:18:32,865 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-07-24 15:18:32,867 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 15:18:32,867 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6, 5, 4] total 15 [2018-07-24 15:18:32,867 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 15:18:32,868 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 15:18:32,868 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 15:18:32,868 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2018-07-24 15:18:32,869 INFO L87 Difference]: Start difference. First operand 144 states and 200 transitions. Second operand 9 states. [2018-07-24 15:18:33,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:18:33,254 INFO L93 Difference]: Finished difference Result 187 states and 260 transitions. [2018-07-24 15:18:33,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 15:18:33,254 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2018-07-24 15:18:33,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:18:33,256 INFO L225 Difference]: With dead ends: 187 [2018-07-24 15:18:33,256 INFO L226 Difference]: Without dead ends: 183 [2018-07-24 15:18:33,256 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2018-07-24 15:18:33,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-07-24 15:18:33,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 180. [2018-07-24 15:18:33,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-07-24 15:18:33,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 251 transitions. [2018-07-24 15:18:33,264 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 251 transitions. Word has length 51 [2018-07-24 15:18:33,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:18:33,265 INFO L471 AbstractCegarLoop]: Abstraction has 180 states and 251 transitions. [2018-07-24 15:18:33,265 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 15:18:33,265 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 251 transitions. [2018-07-24 15:18:33,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-07-24 15:18:33,266 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:18:33,266 INFO L353 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 15:18:33,266 INFO L414 AbstractCegarLoop]: === Iteration 16 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:18:33,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1248250631, now seen corresponding path program 1 times [2018-07-24 15:18:33,266 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:18:33,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:33,267 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:18:33,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:33,267 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:18:33,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:18:33,507 WARN L169 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-07-24 15:18:33,679 WARN L169 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-07-24 15:18:33,885 WARN L169 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2018-07-24 15:18:33,927 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:18:33,927 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:18:33,927 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 15:18:33,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:18:33,935 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:18:34,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:18:34,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:18:34,103 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:18:34,104 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:18:34,454 WARN L169 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 21 [2018-07-24 15:18:35,203 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-07-24 15:18:35,225 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:18:35,225 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 15:18:35,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:18:35,243 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:18:35,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:18:35,518 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:18:36,097 WARN L169 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 13 [2018-07-24 15:18:36,109 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:18:36,109 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:18:36,390 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-07-24 15:18:36,393 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 15:18:36,393 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7, 8, 7] total 16 [2018-07-24 15:18:36,393 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 15:18:36,394 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 15:18:36,394 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 15:18:36,394 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2018-07-24 15:18:36,394 INFO L87 Difference]: Start difference. First operand 180 states and 251 transitions. Second operand 9 states. [2018-07-24 15:18:37,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:18:37,010 INFO L93 Difference]: Finished difference Result 184 states and 255 transitions. [2018-07-24 15:18:37,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-24 15:18:37,011 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2018-07-24 15:18:37,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:18:37,013 INFO L225 Difference]: With dead ends: 184 [2018-07-24 15:18:37,013 INFO L226 Difference]: Without dead ends: 182 [2018-07-24 15:18:37,014 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 232 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2018-07-24 15:18:37,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-07-24 15:18:37,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2018-07-24 15:18:37,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-07-24 15:18:37,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 252 transitions. [2018-07-24 15:18:37,022 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 252 transitions. Word has length 61 [2018-07-24 15:18:37,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:18:37,023 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 252 transitions. [2018-07-24 15:18:37,023 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 15:18:37,023 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 252 transitions. [2018-07-24 15:18:37,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-07-24 15:18:37,024 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:18:37,024 INFO L353 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 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] [2018-07-24 15:18:37,024 INFO L414 AbstractCegarLoop]: === Iteration 17 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:18:37,024 INFO L82 PathProgramCache]: Analyzing trace with hash 564297596, now seen corresponding path program 1 times [2018-07-24 15:18:37,025 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:18:37,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:37,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:18:37,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:37,026 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:18:37,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:18:37,589 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 81 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-07-24 15:18:37,590 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:18:37,590 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 15:18:37,603 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:18:37,604 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:18:37,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:18:37,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:18:37,854 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 81 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-07-24 15:18:37,855 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:18:38,083 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2018-07-24 15:18:38,104 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:18:38,104 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 15:18:38,120 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:18:38,121 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:18:38,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:18:38,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:18:38,402 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 81 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-07-24 15:18:38,403 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:18:38,669 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2018-07-24 15:18:38,671 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 15:18:38,672 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4, 6, 4] total 9 [2018-07-24 15:18:38,672 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 15:18:38,672 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 15:18:38,672 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 15:18:38,673 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-07-24 15:18:38,673 INFO L87 Difference]: Start difference. First operand 181 states and 252 transitions. Second operand 7 states. [2018-07-24 15:18:38,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:18:38,765 INFO L93 Difference]: Finished difference Result 223 states and 308 transitions. [2018-07-24 15:18:38,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 15:18:38,766 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 79 [2018-07-24 15:18:38,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:18:38,768 INFO L225 Difference]: With dead ends: 223 [2018-07-24 15:18:38,769 INFO L226 Difference]: Without dead ends: 220 [2018-07-24 15:18:38,769 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 308 SyntacticMatches, 10 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-07-24 15:18:38,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2018-07-24 15:18:38,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 217. [2018-07-24 15:18:38,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-07-24 15:18:38,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 302 transitions. [2018-07-24 15:18:38,780 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 302 transitions. Word has length 79 [2018-07-24 15:18:38,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:18:38,781 INFO L471 AbstractCegarLoop]: Abstraction has 217 states and 302 transitions. [2018-07-24 15:18:38,781 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-24 15:18:38,781 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 302 transitions. [2018-07-24 15:18:38,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-07-24 15:18:38,782 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:18:38,782 INFO L353 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 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] [2018-07-24 15:18:38,782 INFO L414 AbstractCegarLoop]: === Iteration 18 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:18:38,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1030800333, now seen corresponding path program 1 times [2018-07-24 15:18:38,783 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:18:38,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:38,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:18:38,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:38,784 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:18:38,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:18:39,208 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 14 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:18:39,208 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:18:39,208 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 15:18:39,215 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:18:39,215 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:18:39,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:18:39,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:18:39,385 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 14 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:18:39,386 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:18:39,696 WARN L169 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 23 [2018-07-24 15:18:40,183 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 29 proven. 63 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-07-24 15:18:40,203 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:18:40,204 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 15:18:40,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:18:40,219 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:18:40,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:18:40,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:18:40,883 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 14 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:18:40,884 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:18:41,312 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 14 proven. 72 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-07-24 15:18:41,314 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 15:18:41,314 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8, 9, 6] total 16 [2018-07-24 15:18:41,314 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 15:18:41,315 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-24 15:18:41,315 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-24 15:18:41,316 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2018-07-24 15:18:41,316 INFO L87 Difference]: Start difference. First operand 217 states and 302 transitions. Second operand 10 states. [2018-07-24 15:18:41,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:18:41,698 INFO L93 Difference]: Finished difference Result 220 states and 305 transitions. [2018-07-24 15:18:41,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-24 15:18:41,699 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 82 [2018-07-24 15:18:41,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:18:41,701 INFO L225 Difference]: With dead ends: 220 [2018-07-24 15:18:41,701 INFO L226 Difference]: Without dead ends: 218 [2018-07-24 15:18:41,702 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 317 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2018-07-24 15:18:41,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-07-24 15:18:41,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2018-07-24 15:18:41,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2018-07-24 15:18:41,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 303 transitions. [2018-07-24 15:18:41,711 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 303 transitions. Word has length 82 [2018-07-24 15:18:41,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:18:41,711 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 303 transitions. [2018-07-24 15:18:41,711 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-24 15:18:41,711 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 303 transitions. [2018-07-24 15:18:41,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-07-24 15:18:41,712 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:18:41,712 INFO L353 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 4, 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] [2018-07-24 15:18:41,712 INFO L414 AbstractCegarLoop]: === Iteration 19 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:18:41,713 INFO L82 PathProgramCache]: Analyzing trace with hash 644642791, now seen corresponding path program 1 times [2018-07-24 15:18:41,713 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:18:41,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:41,714 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:18:41,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:41,714 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:18:41,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:18:41,960 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 16 proven. 123 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-07-24 15:18:41,960 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:18:41,960 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 15:18:41,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:18:41,968 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:18:42,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:18:42,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:18:42,179 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 16 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:18:42,179 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:18:42,325 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 16 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-07-24 15:18:42,345 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:18:42,345 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 19 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 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 15:18:42,361 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:18:42,361 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 15:18:42,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:18:42,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:18:42,632 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 16 proven. 123 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-07-24 15:18:42,632 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:18:42,777 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 16 proven. 68 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-07-24 15:18:42,779 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 15:18:42,780 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 6, 7, 4] total 21 [2018-07-24 15:18:42,780 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 15:18:42,780 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-24 15:18:42,780 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-24 15:18:42,780 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2018-07-24 15:18:42,781 INFO L87 Difference]: Start difference. First operand 218 states and 303 transitions. Second operand 15 states. [2018-07-24 15:18:42,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:18:42,986 INFO L93 Difference]: Finished difference Result 261 states and 363 transitions. [2018-07-24 15:18:42,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-24 15:18:42,987 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 93 [2018-07-24 15:18:42,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:18:42,989 INFO L225 Difference]: With dead ends: 261 [2018-07-24 15:18:42,990 INFO L226 Difference]: Without dead ends: 257 [2018-07-24 15:18:42,990 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 360 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2018-07-24 15:18:42,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2018-07-24 15:18:43,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 254. [2018-07-24 15:18:43,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2018-07-24 15:18:43,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 354 transitions. [2018-07-24 15:18:43,001 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 354 transitions. Word has length 93 [2018-07-24 15:18:43,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:18:43,001 INFO L471 AbstractCegarLoop]: Abstraction has 254 states and 354 transitions. [2018-07-24 15:18:43,002 INFO L472 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-24 15:18:43,002 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 354 transitions. [2018-07-24 15:18:43,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-07-24 15:18:43,003 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:18:43,003 INFO L353 BasicCegarLoop]: trace histogram [10, 9, 6, 6, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 15:18:43,003 INFO L414 AbstractCegarLoop]: === Iteration 20 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:18:43,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1306502892, now seen corresponding path program 2 times [2018-07-24 15:18:43,004 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:18:43,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:43,004 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 15:18:43,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:43,005 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:18:43,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:18:43,326 WARN L169 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-07-24 15:18:43,476 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-07-24 15:18:43,935 WARN L169 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2018-07-24 15:18:44,146 WARN L169 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-07-24 15:18:44,361 WARN L169 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-07-24 15:18:44,530 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 18 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:18:44,531 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:18:44,531 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 15:18:44,539 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 15:18:44,539 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 15:18:44,667 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 15:18:44,668 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 15:18:44,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:18:44,858 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 18 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:18:44,858 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:18:45,319 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 21 [2018-07-24 15:18:46,047 WARN L169 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2018-07-24 15:18:46,164 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 42 proven. 106 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-07-24 15:18:46,185 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:18:46,185 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 21 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 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 15:18:46,200 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 15:18:46,201 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 15:18:46,786 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 15:18:46,786 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 15:18:46,795 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:18:46,898 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 18 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:18:46,898 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:18:47,270 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 18 proven. 128 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2018-07-24 15:18:47,272 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 15:18:47,272 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 8, 12, 7] total 21 [2018-07-24 15:18:47,272 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 15:18:47,273 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-24 15:18:47,273 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-24 15:18:47,273 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2018-07-24 15:18:47,273 INFO L87 Difference]: Start difference. First operand 254 states and 354 transitions. Second operand 14 states. [2018-07-24 15:18:47,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:18:47,966 INFO L93 Difference]: Finished difference Result 264 states and 364 transitions. [2018-07-24 15:18:47,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-07-24 15:18:47,966 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 103 [2018-07-24 15:18:47,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:18:47,970 INFO L225 Difference]: With dead ends: 264 [2018-07-24 15:18:47,970 INFO L226 Difference]: Without dead ends: 262 [2018-07-24 15:18:47,970 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 396 SyntacticMatches, 9 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2018-07-24 15:18:47,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2018-07-24 15:18:47,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 255. [2018-07-24 15:18:47,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-07-24 15:18:47,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 355 transitions. [2018-07-24 15:18:47,981 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 355 transitions. Word has length 103 [2018-07-24 15:18:47,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:18:47,981 INFO L471 AbstractCegarLoop]: Abstraction has 255 states and 355 transitions. [2018-07-24 15:18:47,981 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-24 15:18:47,981 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 355 transitions. [2018-07-24 15:18:47,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-07-24 15:18:47,983 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:18:47,983 INFO L353 BasicCegarLoop]: trace histogram [12, 11, 8, 8, 5, 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] [2018-07-24 15:18:47,983 INFO L414 AbstractCegarLoop]: === Iteration 21 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:18:47,983 INFO L82 PathProgramCache]: Analyzing trace with hash -498500945, now seen corresponding path program 2 times [2018-07-24 15:18:47,983 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:18:47,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:47,984 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 15:18:47,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:47,984 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:18:48,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:18:48,958 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 22 proven. 248 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-07-24 15:18:48,958 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:18:48,958 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 15:18:48,965 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 15:18:48,965 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 15:18:49,079 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 15:18:49,079 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 15:18:49,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:18:49,141 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 22 proven. 248 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-07-24 15:18:49,141 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:18:49,514 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 22 proven. 120 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2018-07-24 15:18:49,535 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:18:49,535 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 23 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 23 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 15:18:49,551 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 15:18:49,551 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 15:18:49,913 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 15:18:49,913 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 15:18:49,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:18:49,976 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 22 proven. 248 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-07-24 15:18:49,976 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:18:50,163 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 22 proven. 120 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2018-07-24 15:18:50,165 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 15:18:50,165 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 4, 8, 4] total 11 [2018-07-24 15:18:50,165 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 15:18:50,166 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 15:18:50,166 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 15:18:50,166 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-07-24 15:18:50,166 INFO L87 Difference]: Start difference. First operand 255 states and 355 transitions. Second operand 9 states. [2018-07-24 15:18:50,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:18:50,310 INFO L93 Difference]: Finished difference Result 297 states and 411 transitions. [2018-07-24 15:18:50,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-07-24 15:18:50,310 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 121 [2018-07-24 15:18:50,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:18:50,313 INFO L225 Difference]: With dead ends: 297 [2018-07-24 15:18:50,313 INFO L226 Difference]: Without dead ends: 294 [2018-07-24 15:18:50,314 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 484 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-07-24 15:18:50,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2018-07-24 15:18:50,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 291. [2018-07-24 15:18:50,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2018-07-24 15:18:50,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 405 transitions. [2018-07-24 15:18:50,324 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 405 transitions. Word has length 121 [2018-07-24 15:18:50,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:18:50,325 INFO L471 AbstractCegarLoop]: Abstraction has 291 states and 405 transitions. [2018-07-24 15:18:50,325 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 15:18:50,325 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 405 transitions. [2018-07-24 15:18:50,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-07-24 15:18:50,326 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:18:50,326 INFO L353 BasicCegarLoop]: trace histogram [12, 11, 8, 8, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 15:18:50,326 INFO L414 AbstractCegarLoop]: === Iteration 22 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:18:50,327 INFO L82 PathProgramCache]: Analyzing trace with hash -363229152, now seen corresponding path program 2 times [2018-07-24 15:18:50,327 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:18:50,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:50,328 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 15:18:50,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:50,328 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:18:50,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:18:50,647 WARN L169 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-07-24 15:18:50,936 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 22 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:18:50,936 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:18:50,936 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 15:18:50,944 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 15:18:50,944 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 15:18:51,078 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 15:18:51,078 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 15:18:51,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:18:51,192 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 22 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:18:51,193 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:18:52,649 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 107 proven. 142 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2018-07-24 15:18:52,672 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:18:52,672 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 25 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 25 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 15:18:52,688 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 15:18:52,688 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 15:18:53,724 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 15:18:53,724 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 15:18:53,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:18:53,788 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 22 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:18:53,788 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:18:54,564 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 22 proven. 183 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2018-07-24 15:18:54,566 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 15:18:54,566 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 9, 13, 6] total 23 [2018-07-24 15:18:54,566 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 15:18:54,567 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-24 15:18:54,567 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-24 15:18:54,567 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2018-07-24 15:18:54,567 INFO L87 Difference]: Start difference. First operand 291 states and 405 transitions. Second operand 14 states. [2018-07-24 15:18:54,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:18:54,841 INFO L93 Difference]: Finished difference Result 294 states and 408 transitions. [2018-07-24 15:18:54,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-24 15:18:54,843 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 124 [2018-07-24 15:18:54,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:18:54,845 INFO L225 Difference]: With dead ends: 294 [2018-07-24 15:18:54,845 INFO L226 Difference]: Without dead ends: 292 [2018-07-24 15:18:54,846 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 480 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2018-07-24 15:18:54,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2018-07-24 15:18:54,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2018-07-24 15:18:54,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-07-24 15:18:54,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 406 transitions. [2018-07-24 15:18:54,856 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 406 transitions. Word has length 124 [2018-07-24 15:18:54,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:18:54,857 INFO L471 AbstractCegarLoop]: Abstraction has 292 states and 406 transitions. [2018-07-24 15:18:54,857 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-24 15:18:54,857 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 406 transitions. [2018-07-24 15:18:54,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-07-24 15:18:54,858 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:18:54,858 INFO L353 BasicCegarLoop]: trace histogram [13, 12, 9, 9, 6, 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] [2018-07-24 15:18:54,859 INFO L414 AbstractCegarLoop]: === Iteration 23 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:18:54,859 INFO L82 PathProgramCache]: Analyzing trace with hash -730440230, now seen corresponding path program 2 times [2018-07-24 15:18:54,859 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:18:54,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:54,860 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 15:18:54,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:54,860 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:18:54,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:18:55,259 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 24 proven. 318 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-07-24 15:18:55,260 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:18:55,260 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 15:18:55,267 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 15:18:55,267 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 15:18:55,401 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 15:18:55,401 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 15:18:55,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:18:55,629 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 24 proven. 339 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:18:55,629 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:18:55,783 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 24 proven. 225 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-07-24 15:18:55,803 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:18:55,803 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 27 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 27 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 15:18:55,818 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 15:18:55,819 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 15:18:56,236 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 15:18:56,236 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 15:18:56,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:18:56,290 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 24 proven. 318 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-07-24 15:18:56,291 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:18:56,401 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 24 proven. 153 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2018-07-24 15:18:56,403 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 15:18:56,403 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 6, 9, 4] total 27 [2018-07-24 15:18:56,403 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 15:18:56,404 INFO L450 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-07-24 15:18:56,404 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-07-24 15:18:56,405 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2018-07-24 15:18:56,405 INFO L87 Difference]: Start difference. First operand 292 states and 406 transitions. Second operand 21 states. [2018-07-24 15:18:56,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:18:56,720 INFO L93 Difference]: Finished difference Result 335 states and 466 transitions. [2018-07-24 15:18:56,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-24 15:18:56,720 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 135 [2018-07-24 15:18:56,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:18:56,723 INFO L225 Difference]: With dead ends: 335 [2018-07-24 15:18:56,723 INFO L226 Difference]: Without dead ends: 331 [2018-07-24 15:18:56,724 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 526 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2018-07-24 15:18:56,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2018-07-24 15:18:56,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 328. [2018-07-24 15:18:56,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-07-24 15:18:56,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 457 transitions. [2018-07-24 15:18:56,735 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 457 transitions. Word has length 135 [2018-07-24 15:18:56,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:18:56,735 INFO L471 AbstractCegarLoop]: Abstraction has 328 states and 457 transitions. [2018-07-24 15:18:56,735 INFO L472 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-07-24 15:18:56,736 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 457 transitions. [2018-07-24 15:18:56,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-07-24 15:18:56,737 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 15:18:56,737 INFO L353 BasicCegarLoop]: trace histogram [14, 13, 9, 9, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 15:18:56,737 INFO L414 AbstractCegarLoop]: === Iteration 24 === [mainErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 15:18:56,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1381697249, now seen corresponding path program 3 times [2018-07-24 15:18:56,738 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 15:18:56,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:56,738 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 15:18:56,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 15:18:56,739 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 15:18:56,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 15:18:57,123 WARN L169 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-07-24 15:18:57,288 WARN L169 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-07-24 15:18:57,696 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 26 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 15:18:57,696 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:18:57,696 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 15:18:57,706 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-24 15:18:57,706 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-07-24 15:18:57,791 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-07-24 15:18:57,791 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 15:18:57,795 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:18:58,255 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 208 proven. 26 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2018-07-24 15:18:58,255 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:18:58,734 WARN L169 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 22 [2018-07-24 15:18:59,418 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 208 proven. 26 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2018-07-24 15:18:59,438 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 15:18:59,438 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 29 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 29 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 15:18:59,452 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-24 15:18:59,453 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-07-24 15:19:00,160 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-07-24 15:19:00,160 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 15:19:00,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 15:19:01,182 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 209 proven. 25 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2018-07-24 15:19:01,182 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 15:19:01,603 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 208 proven. 26 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2018-07-24 15:19:01,607 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 15:19:01,608 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7, 7, 8, 8] total 28 [2018-07-24 15:19:01,608 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 15:19:01,609 INFO L450 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-07-24 15:19:01,609 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-07-24 15:19:01,609 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2018-07-24 15:19:01,609 INFO L87 Difference]: Start difference. First operand 328 states and 457 transitions. Second operand 22 states. [2018-07-24 15:19:03,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 15:19:03,059 INFO L93 Difference]: Finished difference Result 348 states and 478 transitions. [2018-07-24 15:19:03,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-07-24 15:19:03,060 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 145 [2018-07-24 15:19:03,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 15:19:03,060 INFO L225 Difference]: With dead ends: 348 [2018-07-24 15:19:03,061 INFO L226 Difference]: Without dead ends: 0 [2018-07-24 15:19:03,063 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 575 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=255, Invalid=2295, Unknown=0, NotChecked=0, Total=2550 [2018-07-24 15:19:03,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-07-24 15:19:03,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-07-24 15:19:03,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-07-24 15:19:03,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-07-24 15:19:03,064 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 145 [2018-07-24 15:19:03,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 15:19:03,064 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-07-24 15:19:03,064 INFO L472 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-07-24 15:19:03,064 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-07-24 15:19:03,064 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-07-24 15:19:03,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-07-24 15:19:03,113 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-24 15:19:03,137 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-24 15:19:03,145 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-24 15:19:03,153 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-24 15:19:03,156 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-24 15:19:03,163 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-24 15:19:03,164 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-24 15:19:03,166 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-07-24 15:19:03,796 WARN L169 SmtUtils]: Spent 605.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 28 [2018-07-24 15:19:04,143 WARN L169 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 45 [2018-07-24 15:19:04,148 INFO L421 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-07-24 15:19:04,149 INFO L424 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2018-07-24 15:19:04,149 INFO L421 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2018-07-24 15:19:04,149 INFO L424 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-07-24 15:19:04,149 INFO L424 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-07-24 15:19:04,149 INFO L421 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-07-24 15:19:04,149 INFO L421 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-07-24 15:19:04,149 INFO L421 ceAbstractionStarter]: For program point L60(lines 60 75) no Hoare annotation was computed. [2018-07-24 15:19:04,149 INFO L421 ceAbstractionStarter]: For program point L62(lines 62 73) no Hoare annotation was computed. [2018-07-24 15:19:04,149 INFO L421 ceAbstractionStarter]: For program point L66(lines 66 68) no Hoare annotation was computed. [2018-07-24 15:19:04,149 INFO L421 ceAbstractionStarter]: For program point L76(lines 76 91) no Hoare annotation was computed. [2018-07-24 15:19:04,149 INFO L421 ceAbstractionStarter]: For program point L78(lines 78 89) no Hoare annotation was computed. [2018-07-24 15:19:04,150 INFO L421 ceAbstractionStarter]: For program point L82(lines 82 84) no Hoare annotation was computed. [2018-07-24 15:19:04,150 INFO L421 ceAbstractionStarter]: For program point L92(lines 92 107) no Hoare annotation was computed. [2018-07-24 15:19:04,150 INFO L421 ceAbstractionStarter]: For program point L94(lines 94 105) no Hoare annotation was computed. [2018-07-24 15:19:04,150 INFO L421 ceAbstractionStarter]: For program point L98(lines 98 100) no Hoare annotation was computed. [2018-07-24 15:19:04,150 INFO L421 ceAbstractionStarter]: For program point L24'''(lines 24 561) no Hoare annotation was computed. [2018-07-24 15:19:04,151 INFO L417 ceAbstractionStarter]: At program point L24''(lines 24 561) the Hoare annotation is: (let ((.cse0 (<= main_~this_buffer_empty~0 0)) (.cse1 (<= 0 main_~this_buffer_empty~0))) (or (and (<= main_~this_expect~0 0) (<= 0 main_~this_expect~0) (= main_~q~0 0) .cse0 .cse1) (and (exists ((main_~P1~0 Int)) (let ((.cse2 (mod main_~P1~0 2))) (and (= .cse2 0) (= .cse2 (mod main_~this_expect~0 2))))) (<= 5 main_~q~0) (<= 0 (+ main_~P8~0 2147483648)) (<= main_~P8~0 2147483647) .cse0 .cse1))) [2018-07-24 15:19:04,151 INFO L421 ceAbstractionStarter]: For program point mainFINAL(lines 14 566) no Hoare annotation was computed. [2018-07-24 15:19:04,151 INFO L421 ceAbstractionStarter]: For program point L508(lines 508 523) no Hoare annotation was computed. [2018-07-24 15:19:04,151 INFO L421 ceAbstractionStarter]: For program point mainEXIT(lines 14 566) no Hoare annotation was computed. [2018-07-24 15:19:04,151 INFO L421 ceAbstractionStarter]: For program point L524(lines 524 539) no Hoare annotation was computed. [2018-07-24 15:19:04,151 INFO L421 ceAbstractionStarter]: For program point L526(lines 526 537) no Hoare annotation was computed. [2018-07-24 15:19:04,151 INFO L421 ceAbstractionStarter]: For program point L408(lines 408 423) no Hoare annotation was computed. [2018-07-24 15:19:04,151 INFO L421 ceAbstractionStarter]: For program point L510(lines 510 521) no Hoare annotation was computed. [2018-07-24 15:19:04,151 INFO L421 ceAbstractionStarter]: For program point L514(lines 514 516) no Hoare annotation was computed. [2018-07-24 15:19:04,151 INFO L421 ceAbstractionStarter]: For program point L542(lines 542 553) no Hoare annotation was computed. [2018-07-24 15:19:04,152 INFO L421 ceAbstractionStarter]: For program point L540(lines 540 555) no Hoare annotation was computed. [2018-07-24 15:19:04,152 INFO L421 ceAbstractionStarter]: For program point L546(lines 546 548) no Hoare annotation was computed. [2018-07-24 15:19:04,152 INFO L421 ceAbstractionStarter]: For program point L424(lines 424 439) no Hoare annotation was computed. [2018-07-24 15:19:04,152 INFO L421 ceAbstractionStarter]: For program point L308(lines 308 323) no Hoare annotation was computed. [2018-07-24 15:19:04,152 INFO L421 ceAbstractionStarter]: For program point L426(lines 426 437) no Hoare annotation was computed. [2018-07-24 15:19:04,152 INFO L417 ceAbstractionStarter]: At program point L547(lines 14 566) the Hoare annotation is: false [2018-07-24 15:19:04,152 INFO L421 ceAbstractionStarter]: For program point L410(lines 410 421) no Hoare annotation was computed. [2018-07-24 15:19:04,152 INFO L421 ceAbstractionStarter]: For program point L530(lines 530 532) no Hoare annotation was computed. [2018-07-24 15:19:04,152 INFO L421 ceAbstractionStarter]: For program point L414(lines 414 416) no Hoare annotation was computed. [2018-07-24 15:19:04,152 INFO L424 ceAbstractionStarter]: At program point mainENTRY(lines 14 566) the Hoare annotation is: true [2018-07-24 15:19:04,153 INFO L421 ceAbstractionStarter]: For program point L442(lines 442 453) no Hoare annotation was computed. [2018-07-24 15:19:04,153 INFO L421 ceAbstractionStarter]: For program point L440(lines 440 455) no Hoare annotation was computed. [2018-07-24 15:19:04,153 INFO L421 ceAbstractionStarter]: For program point L326(lines 326 337) no Hoare annotation was computed. [2018-07-24 15:19:04,153 INFO L421 ceAbstractionStarter]: For program point L446(lines 446 448) no Hoare annotation was computed. [2018-07-24 15:19:04,153 INFO L421 ceAbstractionStarter]: For program point L324(lines 324 339) no Hoare annotation was computed. [2018-07-24 15:19:04,153 INFO L421 ceAbstractionStarter]: For program point L208(lines 208 223) no Hoare annotation was computed. [2018-07-24 15:19:04,153 INFO L421 ceAbstractionStarter]: For program point L310(lines 310 321) no Hoare annotation was computed. [2018-07-24 15:19:04,153 INFO L421 ceAbstractionStarter]: For program point L430(lines 430 432) no Hoare annotation was computed. [2018-07-24 15:19:04,154 INFO L417 ceAbstractionStarter]: At program point L557(lines 24 561) the Hoare annotation is: (let ((.cse3 (<= main_~this_buffer_empty~0 1)) (.cse5 (<= 1 main_~this_buffer_empty~0)) (.cse7 (exists ((main_~P1~0 Int)) (let ((.cse8 (mod main_~P1~0 2))) (and (= .cse8 0) (= .cse8 (mod main_~this_expect~0 2)))))) (.cse4 (<= 0 (+ main_~P8~0 2147483648))) (.cse6 (<= main_~P8~0 2147483647)) (.cse0 (<= main_~this_buffer_empty~0 0)) (.cse1 (<= 0 main_~this_buffer_empty~0))) (or (and (<= main_~this_expect~0 0) (= main_~q~0 0) (<= 0 main_~this_expect~0) .cse0 .cse1) (and (exists ((main_~P1~0 Int)) (let ((.cse2 (mod main_~P1~0 2))) (and (= .cse2 0) (= .cse2 (mod (+ main_~this_expect~0 1) 2))))) .cse3 .cse4 .cse5 (= main_~q~0 4) .cse6) (and (= 0 (mod (+ main_~this_expect~0 1) 2)) .cse4 (= main_~q~0 3) .cse6 .cse0 .cse1) (and .cse7 (= main_~q~0 1) .cse3 .cse4 .cse5 .cse6) (and .cse7 (<= 5 main_~q~0) .cse4 .cse6 .cse0 .cse1))) [2018-07-24 15:19:04,154 INFO L421 ceAbstractionStarter]: For program point L314(lines 314 316) no Hoare annotation was computed. [2018-07-24 15:19:04,154 INFO L421 ceAbstractionStarter]: For program point L340(lines 340 355) no Hoare annotation was computed. [2018-07-24 15:19:04,154 INFO L421 ceAbstractionStarter]: For program point L460(lines 460 475) no Hoare annotation was computed. [2018-07-24 15:19:04,154 INFO L421 ceAbstractionStarter]: For program point L342(lines 342 353) no Hoare annotation was computed. [2018-07-24 15:19:04,154 INFO L421 ceAbstractionStarter]: For program point L462(lines 462 473) no Hoare annotation was computed. [2018-07-24 15:19:04,154 INFO L421 ceAbstractionStarter]: For program point L226(lines 226 237) no Hoare annotation was computed. [2018-07-24 15:19:04,154 INFO L421 ceAbstractionStarter]: For program point L346(lines 346 348) no Hoare annotation was computed. [2018-07-24 15:19:04,154 INFO L421 ceAbstractionStarter]: For program point L224(lines 224 239) no Hoare annotation was computed. [2018-07-24 15:19:04,155 INFO L421 ceAbstractionStarter]: For program point L466(lines 466 468) no Hoare annotation was computed. [2018-07-24 15:19:04,155 INFO L421 ceAbstractionStarter]: For program point L108(lines 108 123) no Hoare annotation was computed. [2018-07-24 15:19:04,155 INFO L421 ceAbstractionStarter]: For program point L210(lines 210 221) no Hoare annotation was computed. [2018-07-24 15:19:04,155 INFO L421 ceAbstractionStarter]: For program point L330(lines 330 332) no Hoare annotation was computed. [2018-07-24 15:19:04,155 INFO L421 ceAbstractionStarter]: For program point L214(lines 214 216) no Hoare annotation was computed. [2018-07-24 15:19:04,155 INFO L421 ceAbstractionStarter]: For program point L459(lines 459 558) no Hoare annotation was computed. [2018-07-24 15:19:04,155 INFO L421 ceAbstractionStarter]: For program point L362(lines 362 373) no Hoare annotation was computed. [2018-07-24 15:19:04,155 INFO L421 ceAbstractionStarter]: For program point L240(lines 240 255) no Hoare annotation was computed. [2018-07-24 15:19:04,155 INFO L421 ceAbstractionStarter]: For program point L482(lines 482 484) no Hoare annotation was computed. [2018-07-24 15:19:04,155 INFO L421 ceAbstractionStarter]: For program point L360(lines 360 375) no Hoare annotation was computed. [2018-07-24 15:19:04,155 INFO L421 ceAbstractionStarter]: For program point L124(lines 124 139) no Hoare annotation was computed. [2018-07-24 15:19:04,156 INFO L421 ceAbstractionStarter]: For program point L366(lines 366 368) no Hoare annotation was computed. [2018-07-24 15:19:04,156 INFO L421 ceAbstractionStarter]: For program point mainErr0AssertViolationERROR_FUNCTION(line 565) no Hoare annotation was computed. [2018-07-24 15:19:04,156 INFO L421 ceAbstractionStarter]: For program point L242(lines 242 253) no Hoare annotation was computed. [2018-07-24 15:19:04,156 INFO L421 ceAbstractionStarter]: For program point L126(lines 126 137) no Hoare annotation was computed. [2018-07-24 15:19:04,156 INFO L421 ceAbstractionStarter]: For program point L246(lines 246 248) no Hoare annotation was computed. [2018-07-24 15:19:04,156 INFO L421 ceAbstractionStarter]: For program point L230(lines 230 232) no Hoare annotation was computed. [2018-07-24 15:19:04,156 INFO L421 ceAbstractionStarter]: For program point L476(lines 476 491) no Hoare annotation was computed. [2018-07-24 15:19:04,156 INFO L421 ceAbstractionStarter]: For program point L110(lines 110 121) no Hoare annotation was computed. [2018-07-24 15:19:04,156 INFO L421 ceAbstractionStarter]: For program point L359(lines 359 458) no Hoare annotation was computed. [2018-07-24 15:19:04,156 INFO L421 ceAbstractionStarter]: For program point L478(lines 478 489) no Hoare annotation was computed. [2018-07-24 15:19:04,156 INFO L421 ceAbstractionStarter]: For program point L114(lines 114 116) no Hoare annotation was computed. [2018-07-24 15:19:04,157 INFO L421 ceAbstractionStarter]: For program point L142(lines 142 153) no Hoare annotation was computed. [2018-07-24 15:19:04,157 INFO L421 ceAbstractionStarter]: For program point L262(lines 262 273) no Hoare annotation was computed. [2018-07-24 15:19:04,157 INFO L421 ceAbstractionStarter]: For program point L140(lines 140 155) no Hoare annotation was computed. [2018-07-24 15:19:04,157 INFO L421 ceAbstractionStarter]: For program point L382(lines 382 384) no Hoare annotation was computed. [2018-07-24 15:19:04,157 INFO L421 ceAbstractionStarter]: For program point L260(lines 260 275) no Hoare annotation was computed. [2018-07-24 15:19:04,157 INFO L421 ceAbstractionStarter]: For program point L146(lines 146 148) no Hoare annotation was computed. [2018-07-24 15:19:04,157 INFO L421 ceAbstractionStarter]: For program point L266(lines 266 268) no Hoare annotation was computed. [2018-07-24 15:19:04,157 INFO L421 ceAbstractionStarter]: For program point L494(lines 494 505) no Hoare annotation was computed. [2018-07-24 15:19:04,157 INFO L421 ceAbstractionStarter]: For program point L130(lines 130 132) no Hoare annotation was computed. [2018-07-24 15:19:04,158 INFO L421 ceAbstractionStarter]: For program point L492(lines 492 507) no Hoare annotation was computed. [2018-07-24 15:19:04,158 INFO L421 ceAbstractionStarter]: For program point L498(lines 498 500) no Hoare annotation was computed. [2018-07-24 15:19:04,158 INFO L421 ceAbstractionStarter]: For program point L376(lines 376 391) no Hoare annotation was computed. [2018-07-24 15:19:04,158 INFO L421 ceAbstractionStarter]: For program point L259(lines 259 358) no Hoare annotation was computed. [2018-07-24 15:19:04,158 INFO L421 ceAbstractionStarter]: For program point L378(lines 378 389) no Hoare annotation was computed. [2018-07-24 15:19:04,158 INFO L421 ceAbstractionStarter]: For program point L162(lines 162 173) no Hoare annotation was computed. [2018-07-24 15:19:04,158 INFO L421 ceAbstractionStarter]: For program point L282(lines 282 284) no Hoare annotation was computed. [2018-07-24 15:19:04,158 INFO L421 ceAbstractionStarter]: For program point L166(lines 166 168) no Hoare annotation was computed. [2018-07-24 15:19:04,158 INFO L421 ceAbstractionStarter]: For program point L292(lines 292 307) no Hoare annotation was computed. [2018-07-24 15:19:04,158 INFO L421 ceAbstractionStarter]: For program point L394(lines 394 405) no Hoare annotation was computed. [2018-07-24 15:19:04,159 INFO L421 ceAbstractionStarter]: For program point L392(lines 392 407) no Hoare annotation was computed. [2018-07-24 15:19:04,159 INFO L421 ceAbstractionStarter]: For program point L278(lines 278 289) no Hoare annotation was computed. [2018-07-24 15:19:04,159 INFO L421 ceAbstractionStarter]: For program point L398(lines 398 400) no Hoare annotation was computed. [2018-07-24 15:19:04,159 INFO L421 ceAbstractionStarter]: For program point L276(lines 276 291) no Hoare annotation was computed. [2018-07-24 15:19:04,159 INFO L421 ceAbstractionStarter]: For program point L159(lines 159 258) no Hoare annotation was computed. [2018-07-24 15:19:04,159 INFO L421 ceAbstractionStarter]: For program point L160(lines 160 175) no Hoare annotation was computed. [2018-07-24 15:19:04,159 INFO L421 ceAbstractionStarter]: For program point L192(lines 192 207) no Hoare annotation was computed. [2018-07-24 15:19:04,159 INFO L421 ceAbstractionStarter]: For program point L294(lines 294 305) no Hoare annotation was computed. [2018-07-24 15:19:04,159 INFO L421 ceAbstractionStarter]: For program point L178(lines 178 189) no Hoare annotation was computed. [2018-07-24 15:19:04,160 INFO L421 ceAbstractionStarter]: For program point L298(lines 298 300) no Hoare annotation was computed. [2018-07-24 15:19:04,160 INFO L421 ceAbstractionStarter]: For program point L176(lines 176 191) no Hoare annotation was computed. [2018-07-24 15:19:04,160 INFO L421 ceAbstractionStarter]: For program point L182(lines 182 184) no Hoare annotation was computed. [2018-07-24 15:19:04,160 INFO L421 ceAbstractionStarter]: For program point L194(lines 194 205) no Hoare annotation was computed. [2018-07-24 15:19:04,160 INFO L421 ceAbstractionStarter]: For program point L198(lines 198 200) no Hoare annotation was computed. [2018-07-24 15:19:04,160 INFO L421 ceAbstractionStarter]: For program point L39(lines 39 58) no Hoare annotation was computed. [2018-07-24 15:19:04,160 INFO L421 ceAbstractionStarter]: For program point L40(lines 40 55) no Hoare annotation was computed. [2018-07-24 15:19:04,160 INFO L421 ceAbstractionStarter]: For program point L42(lines 42 53) no Hoare annotation was computed. [2018-07-24 15:19:04,160 INFO L421 ceAbstractionStarter]: For program point L46(lines 46 48) no Hoare annotation was computed. [2018-07-24 15:19:04,160 INFO L421 ceAbstractionStarter]: For program point L59(lines 59 158) no Hoare annotation was computed. [2018-07-24 15:19:04,165 WARN L343 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-07-24 15:19:04,166 WARN L343 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-07-24 15:19:04,174 WARN L343 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-07-24 15:19:04,174 WARN L343 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-07-24 15:19:04,176 WARN L343 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-07-24 15:19:04,176 WARN L343 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-07-24 15:19:04,176 WARN L343 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-07-24 15:19:04,177 WARN L343 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-07-24 15:19:04,177 WARN L343 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-07-24 15:19:04,177 WARN L343 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-07-24 15:19:04,180 WARN L343 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-07-24 15:19:04,180 WARN L343 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-07-24 15:19:04,180 WARN L343 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-07-24 15:19:04,180 WARN L343 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-07-24 15:19:04,181 WARN L343 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-07-24 15:19:04,181 WARN L343 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-07-24 15:19:04,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 03:19:04 BoogieIcfgContainer [2018-07-24 15:19:04,187 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 15:19:04,191 INFO L168 Benchmark]: Toolchain (without parser) took 47116.42 ms. Allocated memory was 1.5 GB in the beginning and 2.7 GB in the end (delta: 1.1 GB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -537.5 MB). Peak memory consumption was 593.4 MB. Max. memory is 7.1 GB. [2018-07-24 15:19:04,192 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 15:19:04,193 INFO L168 Benchmark]: CACSL2BoogieTranslator took 649.96 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-07-24 15:19:04,195 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.55 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 15:19:04,196 INFO L168 Benchmark]: Boogie Preprocessor took 59.71 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-07-24 15:19:04,196 INFO L168 Benchmark]: RCFGBuilder took 2117.78 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 735.1 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -746.8 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2018-07-24 15:19:04,197 INFO L168 Benchmark]: TraceAbstraction took 44245.89 ms. Allocated memory was 2.3 GB in the beginning and 2.7 GB in the end (delta: 395.8 MB). Free memory was 2.1 GB in the beginning and 2.0 GB in the end (delta: 177.6 MB). Peak memory consumption was 573.5 MB. Max. memory is 7.1 GB. [2018-07-24 15:19:04,204 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 649.96 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 32.55 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 59.71 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 2117.78 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 735.1 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -746.8 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 44245.89 ms. Allocated memory was 2.3 GB in the beginning and 2.7 GB in the end (delta: 395.8 MB). Free memory was 2.1 GB in the beginning and 2.0 GB in the end (delta: 177.6 MB). Peak memory consumption was 573.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 565]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant [2018-07-24 15:19:04,221 WARN L343 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-07-24 15:19:04,222 WARN L343 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-07-24 15:19:04,222 WARN L343 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-07-24 15:19:04,223 WARN L343 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] Derived loop invariant: ((((this_expect <= 0 && 0 <= this_expect) && q == 0) && this_buffer_empty <= 0) && 0 <= this_buffer_empty) || ((((((\exists main_~P1~0 : int :: main_~P1~0 % 2 == 0 && main_~P1~0 % 2 == this_expect % 2) && 5 <= q) && 0 <= P8 + 2147483648) && P8 <= 2147483647) && this_buffer_empty <= 0) && 0 <= this_buffer_empty) - InvariantResult [Line: 24]: Loop Invariant [2018-07-24 15:19:04,223 WARN L343 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-07-24 15:19:04,224 WARN L343 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-07-24 15:19:04,224 WARN L343 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-07-24 15:19:04,224 WARN L343 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-07-24 15:19:04,224 WARN L343 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-07-24 15:19:04,224 WARN L343 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-07-24 15:19:04,228 WARN L343 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-07-24 15:19:04,228 WARN L343 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-07-24 15:19:04,229 WARN L343 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-07-24 15:19:04,229 WARN L343 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-07-24 15:19:04,229 WARN L343 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-07-24 15:19:04,229 WARN L343 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] Derived loop invariant: (((((((this_expect <= 0 && q == 0) && 0 <= this_expect) && this_buffer_empty <= 0) && 0 <= this_buffer_empty) || ((((((\exists main_~P1~0 : int :: main_~P1~0 % 2 == 0 && main_~P1~0 % 2 == (this_expect + 1) % 2) && this_buffer_empty <= 1) && 0 <= P8 + 2147483648) && 1 <= this_buffer_empty) && q == 4) && P8 <= 2147483647)) || (((((0 == (this_expect + 1) % 2 && 0 <= P8 + 2147483648) && q == 3) && P8 <= 2147483647) && this_buffer_empty <= 0) && 0 <= this_buffer_empty)) || ((((((\exists main_~P1~0 : int :: main_~P1~0 % 2 == 0 && main_~P1~0 % 2 == this_expect % 2) && q == 1) && this_buffer_empty <= 1) && 0 <= P8 + 2147483648) && 1 <= this_buffer_empty) && P8 <= 2147483647)) || ((((((\exists main_~P1~0 : int :: main_~P1~0 % 2 == 0 && main_~P1~0 % 2 == this_expect % 2) && 5 <= q) && 0 <= P8 + 2147483648) && P8 <= 2147483647) && this_buffer_empty <= 0) && 0 <= this_buffer_empty) - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 114 locations, 1 error locations. SAFE Result, 44.1s OverallTime, 24 OverallIterations, 14 TraceHistogramMax, 8.5s AutomataDifference, 0.0s DeadEndRemovalTime, 1.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4505 SDtfs, 2827 SDslu, 23008 SDs, 0 SdLazy, 2578 SolverSat, 180 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4695 GetRequests, 4399 SyntacticMatches, 61 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 21.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=328occurred in iteration=23, 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: 0.2s AutomataMinimizationTime, 24 MinimizatonAttempts, 83 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 49 NumberOfFragments, 194 HoareAnnotationTreeSize, 7 FomulaSimplifications, 3418 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 7 FomulaSimplificationsInter, 702 FormulaSimplificationTreeSizeReductionInter, 0.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 6.7s SatisfiabilityAnalysisTime, 25.5s InterpolantComputationTime, 3659 NumberOfCodeBlocks, 3491 NumberOfCodeBlocksAsserted, 70 NumberOfCheckSat, 5834 ConstructedInterpolants, 1245 QuantifiedInterpolants, 8189772 SizeOfPredicates, 123 NumberOfNonLiveVariables, 14032 ConjunctsInSsa, 688 ConjunctsInUnsatCore, 80 InterpolantComputations, 12 PerfectInterpolantSequences, 3991/10453 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/psyco_abp_1_true-unreach-call_false-termination_true-no-overflow.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_15-19-04-245.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/psyco_abp_1_true-unreach-call_false-termination_true-no-overflow.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_15-19-04-245.csv Received shutdown request...