java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/loop-lit/ddlm2013_true-unreach-call.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dace188-m [2018-09-14 15:51:52,781 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-14 15:51:52,784 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-14 15:51:52,796 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-14 15:51:52,796 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-14 15:51:52,797 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-14 15:51:52,799 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-14 15:51:52,801 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-14 15:51:52,802 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-14 15:51:52,803 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-14 15:51:52,804 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-14 15:51:52,804 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-14 15:51:52,805 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-14 15:51:52,806 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-14 15:51:52,807 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-14 15:51:52,808 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-14 15:51:52,809 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-14 15:51:52,811 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-14 15:51:52,813 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-14 15:51:52,814 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-14 15:51:52,815 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-14 15:51:52,817 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-14 15:51:52,819 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-14 15:51:52,828 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-14 15:51:52,842 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-14 15:51:52,842 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-14 15:51:52,843 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-14 15:51:52,843 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-14 15:51:52,844 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-14 15:51:52,844 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-14 15:51:52,844 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-14 15:51:52,844 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-14 15:51:52,844 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-14 15:51:52,845 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-14 15:51:52,845 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-14 15:51:52,846 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-14 15:51:52,846 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-14 15:51:52,846 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-14 15:51:52,846 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-14 15:51:52,846 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-14 15:51:52,847 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-14 15:51:52,847 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-14 15:51:52,847 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-14 15:51:52,847 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-14 15:51:52,847 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-14 15:51:52,848 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-14 15:51:52,848 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-14 15:51:52,848 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 15:51:52,848 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-14 15:51:52,848 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-14 15:51:52,849 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-14 15:51:52,849 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-14 15:51:52,849 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-14 15:51:52,849 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-14 15:51:52,849 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-14 15:51:52,850 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-14 15:51:52,850 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-14 15:51:52,906 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-14 15:51:52,919 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-14 15:51:52,926 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-14 15:51:52,928 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-14 15:51:52,929 INFO L276 PluginConnector]: CDTParser initialized [2018-09-14 15:51:52,930 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/ddlm2013_true-unreach-call.i [2018-09-14 15:51:53,304 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1533452cb/4cb8569528c44791ba0b81e3a1d221d3/FLAGad4025d92 [2018-09-14 15:51:53,435 INFO L277 CDTParser]: Found 1 translation units. [2018-09-14 15:51:53,436 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/ddlm2013_true-unreach-call.i [2018-09-14 15:51:53,442 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1533452cb/4cb8569528c44791ba0b81e3a1d221d3/FLAGad4025d92 [2018-09-14 15:51:53,459 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1533452cb/4cb8569528c44791ba0b81e3a1d221d3 [2018-09-14 15:51:53,470 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-14 15:51:53,473 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-14 15:51:53,474 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-14 15:51:53,474 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-14 15:51:53,481 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-14 15:51:53,482 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 03:51:53" (1/1) ... [2018-09-14 15:51:53,485 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2948dc98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:51:53, skipping insertion in model container [2018-09-14 15:51:53,485 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 03:51:53" (1/1) ... [2018-09-14 15:51:53,497 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-14 15:51:53,682 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 15:51:53,701 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-14 15:51:53,710 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 15:51:53,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:51:53 WrapperNode [2018-09-14 15:51:53,725 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-14 15:51:53,726 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-14 15:51:53,726 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-14 15:51:53,726 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-14 15:51:53,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:51:53" (1/1) ... [2018-09-14 15:51:53,742 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:51:53" (1/1) ... [2018-09-14 15:51:53,748 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-14 15:51:53,749 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-14 15:51:53,749 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-14 15:51:53,749 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-14 15:51:53,760 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:51:53" (1/1) ... [2018-09-14 15:51:53,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:51:53" (1/1) ... [2018-09-14 15:51:53,761 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:51:53" (1/1) ... [2018-09-14 15:51:53,761 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:51:53" (1/1) ... [2018-09-14 15:51:53,768 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:51:53" (1/1) ... [2018-09-14 15:51:53,779 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:51:53" (1/1) ... [2018-09-14 15:51:53,783 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:51:53" (1/1) ... [2018-09-14 15:51:53,785 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-14 15:51:53,791 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-14 15:51:53,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-14 15:51:53,792 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-14 15:51:53,793 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:51:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 15:51:53,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-14 15:51:53,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-14 15:51:53,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-14 15:51:53,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-14 15:51:53,870 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-14 15:51:53,870 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-14 15:51:53,870 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-09-14 15:51:53,870 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-09-14 15:51:54,402 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-14 15:51:54,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 03:51:54 BoogieIcfgContainer [2018-09-14 15:51:54,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-14 15:51:54,404 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-14 15:51:54,404 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-14 15:51:54,407 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-14 15:51:54,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.09 03:51:53" (1/3) ... [2018-09-14 15:51:54,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b9f8456 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 03:51:54, skipping insertion in model container [2018-09-14 15:51:54,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:51:53" (2/3) ... [2018-09-14 15:51:54,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b9f8456 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 03:51:54, skipping insertion in model container [2018-09-14 15:51:54,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 03:51:54" (3/3) ... [2018-09-14 15:51:54,411 INFO L112 eAbstractionObserver]: Analyzing ICFG ddlm2013_true-unreach-call.i [2018-09-14 15:51:54,426 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-14 15:51:54,436 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-14 15:51:54,483 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-14 15:51:54,484 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-14 15:51:54,484 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-14 15:51:54,484 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-14 15:51:54,484 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-14 15:51:54,484 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-14 15:51:54,484 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-14 15:51:54,485 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-14 15:51:54,485 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-14 15:51:54,505 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2018-09-14 15:51:54,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-14 15:51:54,511 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 15:51:54,512 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 15:51:54,513 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 15:51:54,517 INFO L82 PathProgramCache]: Analyzing trace with hash 2066841578, now seen corresponding path program 1 times [2018-09-14 15:51:54,519 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 15:51:54,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:51:54,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 15:51:54,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:51:54,565 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 15:51:54,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 15:51:54,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:51:54,645 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 15:51:54,645 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-14 15:51:54,645 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 15:51:54,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-09-14 15:51:54,662 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-09-14 15:51:54,662 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-09-14 15:51:54,665 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2018-09-14 15:51:54,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 15:51:54,685 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2018-09-14 15:51:54,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-09-14 15:51:54,687 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2018-09-14 15:51:54,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 15:51:54,697 INFO L225 Difference]: With dead ends: 36 [2018-09-14 15:51:54,698 INFO L226 Difference]: Without dead ends: 16 [2018-09-14 15:51:54,701 INFO L604 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 [2018-09-14 15:51:54,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-14 15:51:54,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-14 15:51:54,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-14 15:51:54,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-09-14 15:51:54,747 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2018-09-14 15:51:54,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 15:51:54,747 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-09-14 15:51:54,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-09-14 15:51:54,748 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-09-14 15:51:54,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-14 15:51:54,749 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 15:51:54,749 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 15:51:54,749 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 15:51:54,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1651906282, now seen corresponding path program 1 times [2018-09-14 15:51:54,750 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 15:51:54,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:51:54,751 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 15:51:54,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:51:54,751 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 15:51:54,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 15:51:54,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:51:54,938 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 15:51:54,939 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-14 15:51:54,939 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 15:51:54,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 15:51:54,941 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 15:51:54,941 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-14 15:51:54,941 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2018-09-14 15:51:55,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 15:51:55,009 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2018-09-14 15:51:55,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-14 15:51:55,010 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-09-14 15:51:55,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 15:51:55,011 INFO L225 Difference]: With dead ends: 25 [2018-09-14 15:51:55,011 INFO L226 Difference]: Without dead ends: 19 [2018-09-14 15:51:55,012 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-14 15:51:55,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-14 15:51:55,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-14 15:51:55,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-14 15:51:55,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2018-09-14 15:51:55,017 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2018-09-14 15:51:55,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 15:51:55,018 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2018-09-14 15:51:55,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 15:51:55,018 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2018-09-14 15:51:55,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-14 15:51:55,019 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 15:51:55,019 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 15:51:55,019 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 15:51:55,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1973708347, now seen corresponding path program 1 times [2018-09-14 15:51:55,020 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 15:51:55,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:51:55,021 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 15:51:55,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:51:55,021 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 15:51:55,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 15:51:55,343 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 12 [2018-09-14 15:51:55,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:51:55,434 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 15:51:55,434 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 15:51:55,446 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 15:51:55,446 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 15:51:55,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 15:51:55,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 15:51:55,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:51:55,890 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 15:51:56,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:51:56,283 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 15:51:56,284 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 15:51:56,299 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 15:51:56,300 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 15:51:56,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 15:51:56,338 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 15:51:56,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:51:56,346 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 15:51:56,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:51:56,423 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 15:51:56,423 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7] total 15 [2018-09-14 15:51:56,423 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 15:51:56,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-14 15:51:56,424 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-14 15:51:56,424 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2018-09-14 15:51:56,425 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 12 states. [2018-09-14 15:51:56,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 15:51:56,525 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2018-09-14 15:51:56,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 15:51:56,526 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2018-09-14 15:51:56,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 15:51:56,528 INFO L225 Difference]: With dead ends: 32 [2018-09-14 15:51:56,528 INFO L226 Difference]: Without dead ends: 26 [2018-09-14 15:51:56,530 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2018-09-14 15:51:56,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-14 15:51:56,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2018-09-14 15:51:56,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-14 15:51:56,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2018-09-14 15:51:56,534 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2018-09-14 15:51:56,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 15:51:56,534 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2018-09-14 15:51:56,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-14 15:51:56,535 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2018-09-14 15:51:56,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-14 15:51:56,536 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 15:51:56,536 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 15:51:56,536 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 15:51:56,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1386902333, now seen corresponding path program 1 times [2018-09-14 15:51:56,537 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 15:51:56,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:51:56,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 15:51:56,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:51:56,538 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 15:51:56,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 15:51:56,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-14 15:51:56,612 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 15:51:56,612 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 15:51:56,612 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 15:51:56,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 15:51:56,613 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 15:51:56,613 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 15:51:56,613 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 3 states. [2018-09-14 15:51:56,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 15:51:56,622 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2018-09-14 15:51:56,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 15:51:56,623 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2018-09-14 15:51:56,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 15:51:56,624 INFO L225 Difference]: With dead ends: 36 [2018-09-14 15:51:56,624 INFO L226 Difference]: Without dead ends: 23 [2018-09-14 15:51:56,625 INFO L604 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 [2018-09-14 15:51:56,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-14 15:51:56,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-14 15:51:56,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-14 15:51:56,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-09-14 15:51:56,629 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2018-09-14 15:51:56,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 15:51:56,629 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-09-14 15:51:56,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 15:51:56,630 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-09-14 15:51:56,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-14 15:51:56,631 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 15:51:56,631 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 15:51:56,631 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 15:51:56,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1807628064, now seen corresponding path program 2 times [2018-09-14 15:51:56,632 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 15:51:56,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:51:56,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 15:51:56,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:51:56,633 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 15:51:56,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 15:51:57,256 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:51:57,256 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 15:51:57,256 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 15:51:57,268 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-14 15:51:57,268 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-14 15:51:57,311 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-14 15:51:57,311 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-14 15:51:57,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 15:51:57,630 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:51:57,630 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 15:52:02,113 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:52:02,134 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 15:52:02,134 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 5 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 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 15:52:02,149 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-14 15:52:02,149 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-14 15:52:02,180 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-14 15:52:02,181 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-14 15:52:02,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 15:52:02,225 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:52:02,226 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 15:52:02,315 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:52:02,319 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 15:52:02,320 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9] total 21 [2018-09-14 15:52:02,320 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 15:52:02,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-14 15:52:02,321 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-14 15:52:02,321 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=348, Unknown=1, NotChecked=0, Total=420 [2018-09-14 15:52:02,322 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 16 states. [2018-09-14 15:52:06,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 15:52:06,960 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2018-09-14 15:52:06,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-14 15:52:06,963 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 22 [2018-09-14 15:52:06,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 15:52:06,964 INFO L225 Difference]: With dead ends: 60 [2018-09-14 15:52:06,964 INFO L226 Difference]: Without dead ends: 37 [2018-09-14 15:52:06,965 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=108, Invalid=539, Unknown=3, NotChecked=0, Total=650 [2018-09-14 15:52:06,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-14 15:52:06,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 27. [2018-09-14 15:52:06,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-14 15:52:06,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2018-09-14 15:52:06,971 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2018-09-14 15:52:06,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 15:52:06,972 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2018-09-14 15:52:06,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-14 15:52:06,972 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2018-09-14 15:52:06,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-14 15:52:06,973 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 15:52:06,973 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 15:52:06,973 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 15:52:06,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1736007175, now seen corresponding path program 1 times [2018-09-14 15:52:06,974 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 15:52:06,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:52:06,975 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-14 15:52:06,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:52:06,975 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 15:52:06,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 15:52:07,216 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-14 15:52:07,216 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 15:52:07,216 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-14 15:52:07,226 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 15:52:07,226 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 15:52:07,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 15:52:07,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 15:52:07,264 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-14 15:52:07,264 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 15:52:07,306 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-14 15:52:07,334 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 15:52:07,335 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 6 [2018-09-14 15:52:07,335 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 15:52:07,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 15:52:07,336 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 15:52:07,336 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-14 15:52:07,336 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 3 states. [2018-09-14 15:52:07,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 15:52:07,344 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2018-09-14 15:52:07,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 15:52:07,345 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2018-09-14 15:52:07,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 15:52:07,345 INFO L225 Difference]: With dead ends: 27 [2018-09-14 15:52:07,346 INFO L226 Difference]: Without dead ends: 0 [2018-09-14 15:52:07,346 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-14 15:52:07,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-09-14 15:52:07,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-09-14 15:52:07,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-09-14 15:52:07,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-09-14 15:52:07,347 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2018-09-14 15:52:07,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 15:52:07,347 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-09-14 15:52:07,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 15:52:07,348 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-09-14 15:52:07,348 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-09-14 15:52:07,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-09-14 15:52:07,427 INFO L429 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-09-14 15:52:07,427 INFO L426 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-09-14 15:52:07,427 INFO L426 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-09-14 15:52:07,427 INFO L429 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-09-14 15:52:07,427 INFO L429 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-09-14 15:52:07,427 INFO L426 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-09-14 15:52:07,427 INFO L426 ceAbstractionStarter]: For program point L31(lines 31 33) no Hoare annotation was computed. [2018-09-14 15:52:07,428 INFO L426 ceAbstractionStarter]: For program point L25(lines 25 29) no Hoare annotation was computed. [2018-09-14 15:52:07,428 INFO L426 ceAbstractionStarter]: For program point mainEXIT(lines 10 35) no Hoare annotation was computed. [2018-09-14 15:52:07,428 INFO L426 ceAbstractionStarter]: For program point L25-2(lines 10 35) no Hoare annotation was computed. [2018-09-14 15:52:07,428 INFO L426 ceAbstractionStarter]: For program point L21(lines 21 30) no Hoare annotation was computed. [2018-09-14 15:52:07,428 INFO L426 ceAbstractionStarter]: For program point L21-1(lines 21 30) no Hoare annotation was computed. [2018-09-14 15:52:07,428 INFO L426 ceAbstractionStarter]: For program point L21-3(lines 10 35) no Hoare annotation was computed. [2018-09-14 15:52:07,428 INFO L426 ceAbstractionStarter]: For program point mainFINAL(lines 10 35) no Hoare annotation was computed. [2018-09-14 15:52:07,429 INFO L422 ceAbstractionStarter]: At program point L32(line 32) the Hoare annotation is: (and (<= main_~a~0 main_~b~0) (<= main_~b~0 main_~a~0)) [2018-09-14 15:52:07,429 INFO L429 ceAbstractionStarter]: At program point mainENTRY(lines 10 35) the Hoare annotation is: true [2018-09-14 15:52:07,429 INFO L426 ceAbstractionStarter]: For program point L16(lines 16 20) no Hoare annotation was computed. [2018-09-14 15:52:07,429 INFO L429 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-09-14 15:52:07,429 INFO L426 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-09-14 15:52:07,429 INFO L426 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-09-14 15:52:07,429 INFO L426 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-09-14 15:52:07,430 INFO L426 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-09-14 15:52:07,430 INFO L426 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-09-14 15:52:07,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.09 03:52:07 BoogieIcfgContainer [2018-09-14 15:52:07,433 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-14 15:52:07,434 INFO L168 Benchmark]: Toolchain (without parser) took 13963.85 ms. Allocated memory was 1.6 GB in the beginning and 2.3 GB in the end (delta: 752.4 MB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -545.6 MB). Peak memory consumption was 206.7 MB. Max. memory is 7.1 GB. [2018-09-14 15:52:07,436 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-14 15:52:07,436 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.92 ms. Allocated memory is still 1.6 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. [2018-09-14 15:52:07,437 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.21 ms. Allocated memory is still 1.6 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-14 15:52:07,438 INFO L168 Benchmark]: Boogie Preprocessor took 36.02 ms. Allocated memory is still 1.6 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-14 15:52:07,438 INFO L168 Benchmark]: RCFGBuilder took 611.89 ms. Allocated memory was 1.6 GB in the beginning and 2.3 GB in the end (delta: 752.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -809.9 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. [2018-09-14 15:52:07,439 INFO L168 Benchmark]: TraceAbstraction took 13029.35 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 253.7 MB). Peak memory consumption was 253.7 MB. Max. memory is 7.1 GB. [2018-09-14 15:52:07,444 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 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 250.92 ms. Allocated memory is still 1.6 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. * Boogie Procedure Inliner took 23.21 ms. Allocated memory is still 1.6 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 36.02 ms. Allocated memory is still 1.6 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 611.89 ms. Allocated memory was 1.6 GB in the beginning and 2.3 GB in the end (delta: 752.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -809.9 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13029.35 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 253.7 MB). Peak memory consumption was 253.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 1 error locations. SAFE Result, 12.9s OverallTime, 6 OverallIterations, 4 TraceHistogramMax, 4.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 108 SDtfs, 30 SDslu, 266 SDs, 0 SdLazy, 115 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 246 GetRequests, 192 SyntacticMatches, 7 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 11.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=5, 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: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 13 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 15 PreInvPairs, 20 NumberOfFragments, 12 HoareAnnotationTreeSize, 15 FomulaSimplifications, 46 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 15 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 7.3s InterpolantComputationTime, 216 NumberOfCodeBlocks, 216 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 306 ConstructedInterpolants, 0 QuantifiedInterpolants, 33576 SizeOfPredicates, 13 NumberOfNonLiveVariables, 315 ConjunctsInSsa, 95 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 58/131 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/ddlm2013_true-unreach-call.i_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-14_15-52-07-458.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/ddlm2013_true-unreach-call.i_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-14_15-52-07-458.csv Received shutdown request...