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/loop-acceleration/underapprox_false-unreach-call1_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 10:48:53,042 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 10:48:53,044 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 10:48:53,056 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 10:48:53,057 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 10:48:53,059 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 10:48:53,061 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 10:48:53,064 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 10:48:53,066 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 10:48:53,067 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 10:48:53,068 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 10:48:53,069 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 10:48:53,070 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 10:48:53,076 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 10:48:53,078 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 10:48:53,079 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 10:48:53,080 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 10:48:53,082 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 10:48:53,087 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 10:48:53,088 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 10:48:53,092 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 10:48:53,095 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 10:48:53,098 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 10:48:53,098 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 10:48:53,101 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 10:48:53,102 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 10:48:53,103 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 10:48:53,104 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 10:48:53,105 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 10:48:53,108 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 10:48:53,108 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 10:48:53,109 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-07-24 10:48:53,111 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 10:48:53,142 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 10:48:53,143 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 10:48:53,144 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 10:48:53,144 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 10:48:53,148 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 10:48:53,148 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 10:48:53,148 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 10:48:53,148 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 10:48:53,148 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 10:48:53,149 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 10:48:53,149 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 10:48:53,150 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 10:48:53,150 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 10:48:53,150 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 10:48:53,151 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 10:48:53,151 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 10:48:53,151 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 10:48:53,151 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 10:48:53,151 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 10:48:53,152 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 10:48:53,152 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 10:48:53,152 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 10:48:53,152 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 10:48:53,154 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 10:48:53,155 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 10:48:53,155 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 10:48:53,155 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 10:48:53,155 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 10:48:53,155 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 10:48:53,156 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 10:48:53,156 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 10:48:53,156 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 10:48:53,156 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 10:48:53,216 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 10:48:53,232 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 10:48:53,238 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 10:48:53,240 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 10:48:53,240 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 10:48:53,241 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_false-unreach-call1_true-termination.i [2018-07-24 10:48:53,573 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68804e329/44f95547903b4ad39c5e5bfdebd737c8/FLAG30fdefc63 [2018-07-24 10:48:53,703 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 10:48:53,703 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_false-unreach-call1_true-termination.i [2018-07-24 10:48:53,709 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68804e329/44f95547903b4ad39c5e5bfdebd737c8/FLAG30fdefc63 [2018-07-24 10:48:53,724 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68804e329/44f95547903b4ad39c5e5bfdebd737c8 [2018-07-24 10:48:53,737 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 10:48:53,739 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 10:48:53,740 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 10:48:53,740 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 10:48:53,746 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 10:48:53,747 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 10:48:53" (1/1) ... [2018-07-24 10:48:53,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b810d58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:48:53, skipping insertion in model container [2018-07-24 10:48:53,751 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 10:48:53" (1/1) ... [2018-07-24 10:48:53,937 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 10:48:53,985 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 10:48:54,005 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 10:48:54,010 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 10:48:54,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:48:54 WrapperNode [2018-07-24 10:48:54,026 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 10:48:54,026 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 10:48:54,027 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 10:48:54,027 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 10:48:54,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:48:54" (1/1) ... [2018-07-24 10:48:54,044 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:48:54" (1/1) ... [2018-07-24 10:48:54,050 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 10:48:54,050 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 10:48:54,050 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 10:48:54,051 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 10:48:54,061 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:48:54" (1/1) ... [2018-07-24 10:48:54,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:48:54" (1/1) ... [2018-07-24 10:48:54,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:48:54" (1/1) ... [2018-07-24 10:48:54,063 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:48:54" (1/1) ... [2018-07-24 10:48:54,064 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:48:54" (1/1) ... [2018-07-24 10:48:54,070 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:48:54" (1/1) ... [2018-07-24 10:48:54,071 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:48:54" (1/1) ... [2018-07-24 10:48:54,073 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 10:48:54,073 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 10:48:54,074 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 10:48:54,074 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 10:48:54,075 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:48:54" (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 10:48:54,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 10:48:54,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 10:48:54,128 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_acceleration_underapprox_false_unreach_call__true_termination_i____VERIFIER_assert [2018-07-24 10:48:54,128 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_acceleration_underapprox_false_unreach_call__true_termination_i____VERIFIER_assert [2018-07-24 10:48:54,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 10:48:54,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 10:48:54,128 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 10:48:54,128 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 10:48:54,394 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 10:48:54,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 10:48:54 BoogieIcfgContainer [2018-07-24 10:48:54,395 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 10:48:54,396 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 10:48:54,397 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 10:48:54,400 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 10:48:54,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 10:48:53" (1/3) ... [2018-07-24 10:48:54,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5852f164 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 10:48:54, skipping insertion in model container [2018-07-24 10:48:54,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 10:48:54" (2/3) ... [2018-07-24 10:48:54,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5852f164 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 10:48:54, skipping insertion in model container [2018-07-24 10:48:54,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 10:48:54" (3/3) ... [2018-07-24 10:48:54,404 INFO L112 eAbstractionObserver]: Analyzing ICFG underapprox_false-unreach-call1_true-termination.i [2018-07-24 10:48:54,413 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 10:48:54,421 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 10:48:54,474 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 10:48:54,475 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 10:48:54,475 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 10:48:54,475 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 10:48:54,475 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 10:48:54,475 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 10:48:54,476 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 10:48:54,476 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 10:48:54,476 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 10:48:54,491 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2018-07-24 10:48:54,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-07-24 10:48:54,497 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:48:54,498 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:48:54,498 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_acceleration_underapprox_false_unreach_call__true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:48:54,503 INFO L82 PathProgramCache]: Analyzing trace with hash 314686959, now seen corresponding path program 1 times [2018-07-24 10:48:54,505 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:48:54,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:48:54,558 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:48:54,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:48:54,558 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:48:54,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:48:54,616 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 10:48:54,618 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 10:48:54,618 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-07-24 10:48:54,619 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 10:48:54,623 INFO L450 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-07-24 10:48:54,639 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-07-24 10:48:54,639 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-07-24 10:48:54,642 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2018-07-24 10:48:54,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:48:54,665 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2018-07-24 10:48:54,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-07-24 10:48:54,666 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-07-24 10:48:54,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:48:54,676 INFO L225 Difference]: With dead ends: 29 [2018-07-24 10:48:54,676 INFO L226 Difference]: Without dead ends: 12 [2018-07-24 10:48:54,682 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 10:48:54,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-07-24 10:48:54,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-07-24 10:48:54,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-07-24 10:48:54,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-07-24 10:48:54,725 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-07-24 10:48:54,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:48:54,726 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-07-24 10:48:54,726 INFO L472 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-07-24 10:48:54,726 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-07-24 10:48:54,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-07-24 10:48:54,727 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:48:54,727 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:48:54,728 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_acceleration_underapprox_false_unreach_call__true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:48:54,728 INFO L82 PathProgramCache]: Analyzing trace with hash 926255632, now seen corresponding path program 1 times [2018-07-24 10:48:54,729 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:48:54,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:48:54,730 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:48:54,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:48:54,730 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:48:54,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:48:54,856 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 10:48:54,857 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 10:48:54,857 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 10:48:54,858 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 10:48:54,860 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 10:48:54,860 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 10:48:54,860 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 10:48:54,861 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 3 states. [2018-07-24 10:48:54,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:48:54,910 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-07-24 10:48:54,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 10:48:54,912 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-07-24 10:48:54,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:48:54,913 INFO L225 Difference]: With dead ends: 19 [2018-07-24 10:48:54,913 INFO L226 Difference]: Without dead ends: 14 [2018-07-24 10:48:54,914 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 10:48:54,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-07-24 10:48:54,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-07-24 10:48:54,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-07-24 10:48:54,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-07-24 10:48:54,919 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-07-24 10:48:54,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:48:54,920 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-07-24 10:48:54,920 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 10:48:54,920 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-07-24 10:48:54,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-07-24 10:48:54,921 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:48:54,922 INFO L353 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:48:54,922 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_acceleration_underapprox_false_unreach_call__true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:48:54,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1883357962, now seen corresponding path program 1 times [2018-07-24 10:48:54,922 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:48:54,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:48:54,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:48:54,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:48:54,924 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:48:54,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:48:55,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:48:55,051 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:48:55,051 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 10:48:55,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:48:55,073 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 10:48:55,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:48:55,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:48:55,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:48:55,232 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:48:55,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:48:55,511 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:48:55,512 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 10:48:55,528 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:48:55,529 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 10:48:55,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:48:55,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:48:55,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:48:55,789 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:48:56,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:48:56,107 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:48:56,107 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 6, 6] total 14 [2018-07-24 10:48:56,107 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:48:56,108 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 10:48:56,108 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 10:48:56,109 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2018-07-24 10:48:56,109 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 4 states. [2018-07-24 10:48:56,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:48:56,144 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-07-24 10:48:56,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 10:48:56,145 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-07-24 10:48:56,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:48:56,147 INFO L225 Difference]: With dead ends: 21 [2018-07-24 10:48:56,147 INFO L226 Difference]: Without dead ends: 16 [2018-07-24 10:48:56,148 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2018-07-24 10:48:56,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-07-24 10:48:56,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-07-24 10:48:56,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-07-24 10:48:56,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-07-24 10:48:56,153 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-07-24 10:48:56,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:48:56,153 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-07-24 10:48:56,153 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 10:48:56,154 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-07-24 10:48:56,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-07-24 10:48:56,154 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:48:56,154 INFO L353 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:48:56,155 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_acceleration_underapprox_false_unreach_call__true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:48:56,155 INFO L82 PathProgramCache]: Analyzing trace with hash -387592612, now seen corresponding path program 2 times [2018-07-24 10:48:56,155 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:48:56,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:48:56,156 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 10:48:56,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:48:56,157 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:48:56,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:48:56,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:48:56,241 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:48:56,241 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 10:48:56,253 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 10:48:56,253 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 10:48:56,267 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 10:48:56,268 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:48:56,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:48:56,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:48:56,300 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:48:56,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:48:56,483 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:48:56,483 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 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 [2018-07-24 10:48:56,499 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 10:48:56,499 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 10:48:56,525 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 10:48:56,525 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:48:56,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:48:56,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:48:56,651 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:48:57,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:48:57,145 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:48:57,146 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 7, 7] total 18 [2018-07-24 10:48:57,146 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:48:57,146 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 10:48:57,147 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 10:48:57,147 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2018-07-24 10:48:57,148 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 5 states. [2018-07-24 10:48:57,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:48:57,225 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-07-24 10:48:57,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-24 10:48:57,226 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-07-24 10:48:57,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:48:57,227 INFO L225 Difference]: With dead ends: 23 [2018-07-24 10:48:57,227 INFO L226 Difference]: Without dead ends: 18 [2018-07-24 10:48:57,228 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2018-07-24 10:48:57,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-07-24 10:48:57,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-07-24 10:48:57,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-07-24 10:48:57,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-07-24 10:48:57,233 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-07-24 10:48:57,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:48:57,233 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-07-24 10:48:57,233 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 10:48:57,233 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-07-24 10:48:57,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-07-24 10:48:57,234 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:48:57,234 INFO L353 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:48:57,234 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_acceleration_underapprox_false_unreach_call__true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:48:57,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1771135422, now seen corresponding path program 3 times [2018-07-24 10:48:57,235 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:48:57,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:48:57,237 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 10:48:57,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:48:57,237 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:48:57,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:48:57,347 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:48:57,347 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:48:57,347 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 10:48:57,365 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-24 10:48:57,365 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-07-24 10:48:57,378 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-07-24 10:48:57,379 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:48:57,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:48:57,400 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:48:57,400 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:48:57,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:48:57,515 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:48:57,515 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 10:48:57,531 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-07-24 10:48:57,531 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-07-24 10:48:57,562 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-07-24 10:48:57,562 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:48:57,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:48:57,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:48:57,689 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:48:57,906 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:48:57,908 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:48:57,908 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 8, 8] total 22 [2018-07-24 10:48:57,908 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:48:57,908 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 10:48:57,909 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 10:48:57,909 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2018-07-24 10:48:57,910 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 6 states. [2018-07-24 10:48:57,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:48:57,972 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-07-24 10:48:57,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 10:48:57,973 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2018-07-24 10:48:57,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:48:57,974 INFO L225 Difference]: With dead ends: 25 [2018-07-24 10:48:57,974 INFO L226 Difference]: Without dead ends: 20 [2018-07-24 10:48:57,975 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2018-07-24 10:48:57,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-07-24 10:48:57,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-07-24 10:48:57,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-07-24 10:48:57,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-07-24 10:48:57,979 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2018-07-24 10:48:57,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:48:57,980 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-07-24 10:48:57,980 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 10:48:57,980 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-07-24 10:48:57,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-07-24 10:48:57,981 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:48:57,981 INFO L353 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:48:57,982 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_acceleration_underapprox_false_unreach_call__true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:48:57,982 INFO L82 PathProgramCache]: Analyzing trace with hash 84085928, now seen corresponding path program 4 times [2018-07-24 10:48:57,982 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:48:57,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:48:57,985 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 10:48:57,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:48:57,985 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:48:58,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:48:58,143 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:48:58,144 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:48:58,144 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 10:48:58,152 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-24 10:48:58,152 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-07-24 10:48:58,165 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-24 10:48:58,165 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:48:58,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:48:58,188 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:48:58,188 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:48:58,280 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:48:58,302 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:48:58,302 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 10:48:58,319 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-07-24 10:48:58,319 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-07-24 10:48:58,339 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-07-24 10:48:58,339 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:48:58,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:48:58,495 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:48:58,495 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:48:58,699 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:48:58,701 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:48:58,702 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 9, 9] total 26 [2018-07-24 10:48:58,702 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:48:58,703 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 10:48:58,703 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 10:48:58,704 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2018-07-24 10:48:58,704 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 7 states. [2018-07-24 10:48:58,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:48:58,767 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-07-24 10:48:58,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 10:48:58,768 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2018-07-24 10:48:58,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:48:58,769 INFO L225 Difference]: With dead ends: 27 [2018-07-24 10:48:58,769 INFO L226 Difference]: Without dead ends: 22 [2018-07-24 10:48:58,770 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2018-07-24 10:48:58,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-07-24 10:48:58,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-07-24 10:48:58,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-07-24 10:48:58,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-07-24 10:48:58,777 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2018-07-24 10:48:58,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:48:58,777 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-07-24 10:48:58,777 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-24 10:48:58,777 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-07-24 10:48:58,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-07-24 10:48:58,778 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:48:58,778 INFO L353 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:48:58,778 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_acceleration_underapprox_false_unreach_call__true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:48:58,779 INFO L82 PathProgramCache]: Analyzing trace with hash 540375438, now seen corresponding path program 5 times [2018-07-24 10:48:58,779 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:48:58,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:48:58,780 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 10:48:58,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:48:58,780 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:48:58,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 10:48:58,897 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:48:58,898 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:48:58,898 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 10:48:58,906 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-24 10:48:58,907 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 10:48:58,973 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-07-24 10:48:58,974 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:48:58,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:48:59,035 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:48:59,035 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:48:59,167 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:48:59,188 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 10:48:59,189 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 10:48:59,204 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-07-24 10:48:59,205 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 10:48:59,249 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-07-24 10:48:59,249 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 10:48:59,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 10:48:59,523 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:48:59,524 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 10:48:59,811 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 10:48:59,813 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 10:48:59,813 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 10, 10] total 30 [2018-07-24 10:48:59,813 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 10:48:59,814 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-24 10:48:59,814 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-24 10:48:59,815 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2018-07-24 10:48:59,816 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 8 states. [2018-07-24 10:48:59,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 10:48:59,875 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-07-24 10:48:59,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 10:48:59,878 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2018-07-24 10:48:59,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 10:48:59,879 INFO L225 Difference]: With dead ends: 29 [2018-07-24 10:48:59,879 INFO L226 Difference]: Without dead ends: 24 [2018-07-24 10:48:59,880 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2018-07-24 10:48:59,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-07-24 10:48:59,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-07-24 10:48:59,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-07-24 10:48:59,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-07-24 10:48:59,885 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2018-07-24 10:48:59,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 10:48:59,885 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-07-24 10:48:59,885 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-24 10:48:59,886 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-07-24 10:48:59,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-07-24 10:48:59,886 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 10:48:59,887 INFO L353 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 10:48:59,887 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_loop_acceleration_underapprox_false_unreach_call__true_termination_i____VERIFIER_assertErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 10:48:59,887 INFO L82 PathProgramCache]: Analyzing trace with hash 947930356, now seen corresponding path program 6 times [2018-07-24 10:48:59,887 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 10:48:59,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:48:59,888 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 10:48:59,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 10:48:59,888 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 10:48:59,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-07-24 10:48:59,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-07-24 10:48:59,930 INFO L419 BasicCegarLoop]: Counterexample might be feasible [2018-07-24 10:48:59,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 10:48:59 BoogieIcfgContainer [2018-07-24 10:48:59,957 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 10:48:59,958 INFO L168 Benchmark]: Toolchain (without parser) took 6220.21 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 748.7 MB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -410.7 MB). Peak memory consumption was 338.0 MB. Max. memory is 7.1 GB. [2018-07-24 10:48:59,960 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 10:48:59,961 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.24 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 10:48:59,962 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.57 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 10:48:59,962 INFO L168 Benchmark]: Boogie Preprocessor took 22.57 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 10:48:59,963 INFO L168 Benchmark]: RCFGBuilder took 322.38 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 748.7 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -809.4 MB). Peak memory consumption was 27.2 MB. Max. memory is 7.1 GB. [2018-07-24 10:48:59,964 INFO L168 Benchmark]: TraceAbstraction took 5560.81 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 388.2 MB). Peak memory consumption was 388.2 MB. Max. memory is 7.1 GB. [2018-07-24 10:48:59,968 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 286.24 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. * Boogie Procedure Inliner took 23.57 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 22.57 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. * RCFGBuilder took 322.38 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 748.7 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -809.4 MB). Peak memory consumption was 27.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5560.81 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 388.2 MB). Peak memory consumption was 388.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L9] unsigned int x = 0; [L10] unsigned int y = 1; VAL [x=0, y=1] [L11] COND TRUE x < 6 [L12] x++ [L12] x++ [L13] y *= 2 VAL [x=1, y=2] [L11] COND TRUE x < 6 [L12] x++ [L12] x++ [L13] y *= 2 VAL [x=2, y=4] [L11] COND TRUE x < 6 [L12] x++ [L12] x++ [L13] y *= 2 VAL [x=3, y=8] [L11] COND TRUE x < 6 [L12] x++ [L12] x++ [L13] y *= 2 VAL [x=4, y=16] [L11] COND TRUE x < 6 [L12] x++ [L12] x++ [L13] y *= 2 VAL [x=5, y=32] [L11] COND TRUE x < 6 [L12] x++ [L12] x++ [L13] y *= 2 VAL [x=6, y=64] [L11] COND FALSE !(x < 6) VAL [x=6, y=64] [L15] CALL __VERIFIER_assert(y != 64) VAL [\old(cond)=0] [L3] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L4] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 18 locations, 1 error locations. UNSAFE Result, 5.4s OverallTime, 8 OverallIterations, 7 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 99 SDtfs, 0 SDslu, 239 SDs, 0 SdLazy, 133 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 365 GetRequests, 259 SyntacticMatches, 5 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=7, 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, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 299 NumberOfCodeBlocks, 299 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 419 ConstructedInterpolants, 0 QuantifiedInterpolants, 25981 SizeOfPredicates, 15 NumberOfNonLiveVariables, 430 ConjunctsInSsa, 115 ConjunctsInUnsatCore, 27 InterpolantComputations, 2 PerfectInterpolantSequences, 0/350 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/underapprox_false-unreach-call1_true-termination.i_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_10-48-59-981.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/underapprox_false-unreach-call1_true-termination.i_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_10-48-59-981.csv Received shutdown request...