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/eca-rers2012/Problem16_label44_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 12:20:12,331 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 12:20:12,333 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 12:20:12,345 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 12:20:12,346 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 12:20:12,347 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 12:20:12,348 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 12:20:12,350 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 12:20:12,351 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 12:20:12,352 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 12:20:12,353 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 12:20:12,354 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 12:20:12,355 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 12:20:12,356 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 12:20:12,357 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 12:20:12,358 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 12:20:12,358 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 12:20:12,360 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 12:20:12,362 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 12:20:12,364 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 12:20:12,365 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 12:20:12,366 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 12:20:12,369 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 12:20:12,369 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 12:20:12,369 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 12:20:12,370 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 12:20:12,371 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 12:20:12,372 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 12:20:12,373 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 12:20:12,376 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 12:20:12,376 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 12:20:12,377 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 12:20:12,377 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 12:20:12,377 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 12:20:12,379 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 12:20:12,381 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 12:20:12,381 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 12:20:12,413 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 12:20:12,414 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 12:20:12,414 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 12:20:12,415 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 12:20:12,415 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 12:20:12,415 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 12:20:12,418 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 12:20:12,419 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 12:20:12,419 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 12:20:12,419 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 12:20:12,419 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 12:20:12,420 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 12:20:12,420 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 12:20:12,420 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 12:20:12,421 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 12:20:12,421 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 12:20:12,421 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 12:20:12,421 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 12:20:12,423 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 12:20:12,424 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 12:20:12,424 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 12:20:12,424 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 12:20:12,424 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 12:20:12,424 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:20:12,425 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 12:20:12,425 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 12:20:12,425 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 12:20:12,425 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 12:20:12,425 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 12:20:12,426 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 12:20:12,426 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 12:20:12,426 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 12:20:12,426 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 12:20:12,473 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 12:20:12,494 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 12:20:12,498 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 12:20:12,499 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 12:20:12,500 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 12:20:12,500 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label44_false-unreach-call.c [2018-07-24 12:20:12,850 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb55410b7/93c397a52dd047f484f0f58bf0647a28/FLAGed5123266 [2018-07-24 12:20:13,225 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 12:20:13,226 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label44_false-unreach-call.c [2018-07-24 12:20:13,250 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb55410b7/93c397a52dd047f484f0f58bf0647a28/FLAGed5123266 [2018-07-24 12:20:13,270 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb55410b7/93c397a52dd047f484f0f58bf0647a28 [2018-07-24 12:20:13,281 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 12:20:13,282 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 12:20:13,284 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 12:20:13,284 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 12:20:13,290 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 12:20:13,291 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:20:13" (1/1) ... [2018-07-24 12:20:13,294 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ec00d93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:20:13, skipping insertion in model container [2018-07-24 12:20:13,295 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:20:13" (1/1) ... [2018-07-24 12:20:13,547 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 12:20:14,052 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:20:14,070 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 12:20:14,340 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:20:14,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:20:14 WrapperNode [2018-07-24 12:20:14,436 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 12:20:14,437 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 12:20:14,437 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 12:20:14,438 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 12:20:14,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:20:14" (1/1) ... [2018-07-24 12:20:14,491 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:20:14" (1/1) ... [2018-07-24 12:20:14,629 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 12:20:14,630 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 12:20:14,630 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 12:20:14,630 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 12:20:14,939 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:20:14" (1/1) ... [2018-07-24 12:20:14,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:20:14" (1/1) ... [2018-07-24 12:20:14,949 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:20:14" (1/1) ... [2018-07-24 12:20:14,949 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:20:14" (1/1) ... [2018-07-24 12:20:15,003 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:20:14" (1/1) ... [2018-07-24 12:20:15,021 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:20:14" (1/1) ... [2018-07-24 12:20:15,041 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:20:14" (1/1) ... [2018-07-24 12:20:15,064 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 12:20:15,065 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 12:20:15,065 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 12:20:15,065 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 12:20:15,066 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:20:14" (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 12:20:15,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 12:20:15,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 12:20:15,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 12:20:15,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 12:20:15,147 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 12:20:15,148 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 12:20:15,148 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output2 [2018-07-24 12:20:15,148 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output2 [2018-07-24 12:20:15,148 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output [2018-07-24 12:20:15,148 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output [2018-07-24 12:20:21,595 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 12:20:21,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:20:21 BoogieIcfgContainer [2018-07-24 12:20:21,596 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 12:20:21,597 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 12:20:21,597 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 12:20:21,601 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 12:20:21,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 12:20:13" (1/3) ... [2018-07-24 12:20:21,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47ffc595 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:20:21, skipping insertion in model container [2018-07-24 12:20:21,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:20:14" (2/3) ... [2018-07-24 12:20:21,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47ffc595 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:20:21, skipping insertion in model container [2018-07-24 12:20:21,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:20:21" (3/3) ... [2018-07-24 12:20:21,606 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label44_false-unreach-call.c [2018-07-24 12:20:21,617 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 12:20:21,626 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 12:20:21,684 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 12:20:21,684 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 12:20:21,685 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 12:20:21,685 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 12:20:21,685 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 12:20:21,685 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 12:20:21,685 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 12:20:21,686 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 12:20:21,686 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 12:20:21,716 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states. [2018-07-24 12:20:21,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-07-24 12:20:21,724 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:20:21,726 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:20:21,726 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:20:21,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1562986733, now seen corresponding path program 1 times [2018-07-24 12:20:21,734 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:20:21,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:20:21,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:20:21,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:20:21,787 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:20:21,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:20:22,169 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 12:20:22,171 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:20:22,172 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:20:22,172 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:20:22,178 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:20:22,191 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:20:22,192 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:20:22,194 INFO L87 Difference]: Start difference. First operand 410 states. Second operand 3 states. [2018-07-24 12:20:28,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:20:28,245 INFO L93 Difference]: Finished difference Result 1156 states and 2144 transitions. [2018-07-24 12:20:28,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:20:28,256 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2018-07-24 12:20:28,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:20:28,281 INFO L225 Difference]: With dead ends: 1156 [2018-07-24 12:20:28,282 INFO L226 Difference]: Without dead ends: 744 [2018-07-24 12:20:28,296 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:20:28,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2018-07-24 12:20:28,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2018-07-24 12:20:28,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2018-07-24 12:20:28,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1343 transitions. [2018-07-24 12:20:28,403 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1343 transitions. Word has length 37 [2018-07-24 12:20:28,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:20:28,403 INFO L471 AbstractCegarLoop]: Abstraction has 744 states and 1343 transitions. [2018-07-24 12:20:28,404 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:20:28,404 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1343 transitions. [2018-07-24 12:20:28,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-07-24 12:20:28,411 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:20:28,411 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:20:28,411 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:20:28,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1092011687, now seen corresponding path program 1 times [2018-07-24 12:20:28,412 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:20:28,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:20:28,413 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:20:28,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:20:28,414 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:20:28,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:20:28,778 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:20:28,779 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:20:28,779 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:20:28,779 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:20:28,781 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:20:28,782 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:20:28,782 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:20:28,782 INFO L87 Difference]: Start difference. First operand 744 states and 1343 transitions. Second operand 6 states. [2018-07-24 12:20:39,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:20:39,684 INFO L93 Difference]: Finished difference Result 2846 states and 5292 transitions. [2018-07-24 12:20:39,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:20:39,688 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 110 [2018-07-24 12:20:39,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:20:39,704 INFO L225 Difference]: With dead ends: 2846 [2018-07-24 12:20:39,704 INFO L226 Difference]: Without dead ends: 2108 [2018-07-24 12:20:39,712 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:20:39,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2018-07-24 12:20:39,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 2090. [2018-07-24 12:20:39,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2090 states. [2018-07-24 12:20:39,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 3323 transitions. [2018-07-24 12:20:39,795 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 3323 transitions. Word has length 110 [2018-07-24 12:20:39,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:20:39,796 INFO L471 AbstractCegarLoop]: Abstraction has 2090 states and 3323 transitions. [2018-07-24 12:20:39,796 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:20:39,796 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 3323 transitions. [2018-07-24 12:20:39,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-07-24 12:20:39,801 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:20:39,802 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:20:39,802 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:20:39,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1830584188, now seen corresponding path program 1 times [2018-07-24 12:20:39,802 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:20:39,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:20:39,804 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:20:39,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:20:39,804 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:20:39,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:20:40,056 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:20:40,057 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:20:40,057 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:20:40,057 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:20:40,058 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:20:40,058 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:20:40,058 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:20:40,059 INFO L87 Difference]: Start difference. First operand 2090 states and 3323 transitions. Second operand 6 states. [2018-07-24 12:20:43,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:20:43,878 INFO L93 Difference]: Finished difference Result 5579 states and 9308 transitions. [2018-07-24 12:20:43,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:20:43,879 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 139 [2018-07-24 12:20:43,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:20:43,901 INFO L225 Difference]: With dead ends: 5579 [2018-07-24 12:20:43,901 INFO L226 Difference]: Without dead ends: 3495 [2018-07-24 12:20:43,909 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:20:43,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3495 states. [2018-07-24 12:20:43,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3495 to 3483. [2018-07-24 12:20:43,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3483 states. [2018-07-24 12:20:44,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3483 states to 3483 states and 5365 transitions. [2018-07-24 12:20:44,005 INFO L78 Accepts]: Start accepts. Automaton has 3483 states and 5365 transitions. Word has length 139 [2018-07-24 12:20:44,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:20:44,005 INFO L471 AbstractCegarLoop]: Abstraction has 3483 states and 5365 transitions. [2018-07-24 12:20:44,006 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:20:44,006 INFO L276 IsEmpty]: Start isEmpty. Operand 3483 states and 5365 transitions. [2018-07-24 12:20:44,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-07-24 12:20:44,012 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:20:44,013 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:20:44,013 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:20:44,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1510341583, now seen corresponding path program 1 times [2018-07-24 12:20:44,013 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:20:44,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:20:44,014 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:20:44,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:20:44,015 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:20:44,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:20:44,273 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 60 proven. 97 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:20:44,274 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:20:44,274 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 12:20:44,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:20:44,285 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:20:44,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:20:44,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:20:44,799 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-07-24 12:20:44,800 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:20:45,017 WARN L169 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-07-24 12:20:45,845 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 60 proven. 97 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:20:45,884 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:20:45,884 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-07-24 12:20:45,884 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:20:45,885 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:20:45,886 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:20:45,886 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:20:45,890 INFO L87 Difference]: Start difference. First operand 3483 states and 5365 transitions. Second operand 5 states. [2018-07-24 12:20:52,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:20:52,828 INFO L93 Difference]: Finished difference Result 9773 states and 14739 transitions. [2018-07-24 12:20:52,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 12:20:52,828 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2018-07-24 12:20:52,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:20:52,869 INFO L225 Difference]: With dead ends: 9773 [2018-07-24 12:20:52,869 INFO L226 Difference]: Without dead ends: 6296 [2018-07-24 12:20:52,894 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 505 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2018-07-24 12:20:52,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6296 states. [2018-07-24 12:20:53,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6296 to 6048. [2018-07-24 12:20:53,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6048 states. [2018-07-24 12:20:53,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6048 states to 6048 states and 8214 transitions. [2018-07-24 12:20:53,082 INFO L78 Accepts]: Start accepts. Automaton has 6048 states and 8214 transitions. Word has length 255 [2018-07-24 12:20:53,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:20:53,083 INFO L471 AbstractCegarLoop]: Abstraction has 6048 states and 8214 transitions. [2018-07-24 12:20:53,083 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:20:53,083 INFO L276 IsEmpty]: Start isEmpty. Operand 6048 states and 8214 transitions. [2018-07-24 12:20:53,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2018-07-24 12:20:53,098 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:20:53,098 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:20:53,098 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:20:53,099 INFO L82 PathProgramCache]: Analyzing trace with hash -524052369, now seen corresponding path program 1 times [2018-07-24 12:20:53,099 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:20:53,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:20:53,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:20:53,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:20:53,101 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:20:53,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:20:53,476 WARN L169 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:20:53,595 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 96 proven. 226 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-07-24 12:20:53,595 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:20:53,595 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:20:53,606 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:20:53,607 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:20:53,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:20:53,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:20:53,946 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 361 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-07-24 12:20:53,947 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:20:54,303 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 194 proven. 101 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-07-24 12:20:54,333 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:20:54,334 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 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:20:54,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:20:54,357 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:20:54,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:20:54,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:20:54,975 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 361 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-07-24 12:20:54,976 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:20:55,230 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 194 proven. 101 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-07-24 12:20:55,233 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:20:55,233 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 16 [2018-07-24 12:20:55,233 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:20:55,234 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:20:55,235 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:20:55,235 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2018-07-24 12:20:55,235 INFO L87 Difference]: Start difference. First operand 6048 states and 8214 transitions. Second operand 9 states. [2018-07-24 12:21:05,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:21:05,081 INFO L93 Difference]: Finished difference Result 15631 states and 21599 transitions. [2018-07-24 12:21:05,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-07-24 12:21:05,082 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 356 [2018-07-24 12:21:05,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:21:05,130 INFO L225 Difference]: With dead ends: 15631 [2018-07-24 12:21:05,130 INFO L226 Difference]: Without dead ends: 9589 [2018-07-24 12:21:05,180 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1475 GetRequests, 1436 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=315, Invalid=1091, Unknown=0, NotChecked=0, Total=1406 [2018-07-24 12:21:05,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9589 states. [2018-07-24 12:21:05,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9589 to 9292. [2018-07-24 12:21:05,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9292 states. [2018-07-24 12:21:05,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9292 states to 9292 states and 11302 transitions. [2018-07-24 12:21:05,408 INFO L78 Accepts]: Start accepts. Automaton has 9292 states and 11302 transitions. Word has length 356 [2018-07-24 12:21:05,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:21:05,409 INFO L471 AbstractCegarLoop]: Abstraction has 9292 states and 11302 transitions. [2018-07-24 12:21:05,409 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:21:05,409 INFO L276 IsEmpty]: Start isEmpty. Operand 9292 states and 11302 transitions. [2018-07-24 12:21:05,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 827 [2018-07-24 12:21:05,460 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:21:05,461 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:21:05,461 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:21:05,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1059284805, now seen corresponding path program 1 times [2018-07-24 12:21:05,462 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:21:05,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:21:05,463 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:21:05,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:21:05,463 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:21:05,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:21:06,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1390 backedges. 502 proven. 115 refuted. 0 times theorem prover too weak. 773 trivial. 0 not checked. [2018-07-24 12:21:06,886 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:21:06,886 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:21:06,905 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:21:06,905 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:21:07,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:21:07,356 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:21:08,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1390 backedges. 1025 proven. 2 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2018-07-24 12:21:08,001 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:21:08,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1390 backedges. 502 proven. 115 refuted. 0 times theorem prover too weak. 773 trivial. 0 not checked. [2018-07-24 12:21:08,665 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:21:08,665 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 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:21:08,681 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:21:08,681 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:21:09,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:21:09,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:21:09,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1390 backedges. 1025 proven. 2 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2018-07-24 12:21:09,746 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:21:10,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1390 backedges. 502 proven. 115 refuted. 0 times theorem prover too weak. 773 trivial. 0 not checked. [2018-07-24 12:21:10,919 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:21:10,919 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-07-24 12:21:10,920 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:21:10,921 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:21:10,921 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:21:10,922 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:21:10,922 INFO L87 Difference]: Start difference. First operand 9292 states and 11302 transitions. Second operand 9 states. [2018-07-24 12:21:18,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:21:18,395 INFO L93 Difference]: Finished difference Result 18594 states and 23170 transitions. [2018-07-24 12:21:18,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-24 12:21:18,399 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 826 [2018-07-24 12:21:18,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:21:18,451 INFO L225 Difference]: With dead ends: 18594 [2018-07-24 12:21:18,451 INFO L226 Difference]: Without dead ends: 9308 [2018-07-24 12:21:18,477 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3320 GetRequests, 3301 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2018-07-24 12:21:18,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9308 states. [2018-07-24 12:21:18,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9308 to 9293. [2018-07-24 12:21:18,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9293 states. [2018-07-24 12:21:18,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9293 states to 9293 states and 11286 transitions. [2018-07-24 12:21:18,709 INFO L78 Accepts]: Start accepts. Automaton has 9293 states and 11286 transitions. Word has length 826 [2018-07-24 12:21:18,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:21:18,711 INFO L471 AbstractCegarLoop]: Abstraction has 9293 states and 11286 transitions. [2018-07-24 12:21:18,711 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:21:18,711 INFO L276 IsEmpty]: Start isEmpty. Operand 9293 states and 11286 transitions. [2018-07-24 12:21:18,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 835 [2018-07-24 12:21:18,771 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:21:18,772 INFO L353 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:21:18,772 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:21:18,773 INFO L82 PathProgramCache]: Analyzing trace with hash 617360626, now seen corresponding path program 1 times [2018-07-24 12:21:18,773 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:21:18,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:21:18,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:21:18,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:21:18,774 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:21:18,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:21:19,486 WARN L169 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:21:20,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 724 proven. 410 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2018-07-24 12:21:20,510 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:21:20,510 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:21:20,518 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:21:20,518 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:21:20,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:21:20,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:21:21,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 1515 trivial. 0 not checked. [2018-07-24 12:21:21,232 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:21:21,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 1515 trivial. 0 not checked. [2018-07-24 12:21:21,708 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 12:21:21,708 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2018-07-24 12:21:21,708 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:21:21,709 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:21:21,709 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:21:21,709 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:21:21,710 INFO L87 Difference]: Start difference. First operand 9293 states and 11286 transitions. Second operand 3 states. [2018-07-24 12:21:26,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:21:26,486 INFO L93 Difference]: Finished difference Result 18580 states and 22566 transitions. [2018-07-24 12:21:26,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:21:26,487 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 834 [2018-07-24 12:21:26,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:21:26,517 INFO L225 Difference]: With dead ends: 18580 [2018-07-24 12:21:26,517 INFO L226 Difference]: Without dead ends: 9293 [2018-07-24 12:21:26,541 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1681 GetRequests, 1669 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:21:26,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9293 states. [2018-07-24 12:21:26,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9293 to 9290. [2018-07-24 12:21:26,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9290 states. [2018-07-24 12:21:26,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9290 states to 9290 states and 10891 transitions. [2018-07-24 12:21:26,725 INFO L78 Accepts]: Start accepts. Automaton has 9290 states and 10891 transitions. Word has length 834 [2018-07-24 12:21:26,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:21:26,727 INFO L471 AbstractCegarLoop]: Abstraction has 9290 states and 10891 transitions. [2018-07-24 12:21:26,727 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:21:26,727 INFO L276 IsEmpty]: Start isEmpty. Operand 9290 states and 10891 transitions. [2018-07-24 12:21:26,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 885 [2018-07-24 12:21:26,784 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:21:26,784 INFO L353 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:21:26,785 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:21:26,785 INFO L82 PathProgramCache]: Analyzing trace with hash 81391280, now seen corresponding path program 1 times [2018-07-24 12:21:26,785 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:21:26,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:21:26,786 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:21:26,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:21:26,786 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:21:26,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:21:28,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1932 backedges. 1115 proven. 97 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2018-07-24 12:21:28,192 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:21:28,192 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 12:21:28,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:21:28,199 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:21:28,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:21:28,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:21:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1932 backedges. 699 proven. 2 refuted. 0 times theorem prover too weak. 1231 trivial. 0 not checked. [2018-07-24 12:21:28,910 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:21:29,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1932 backedges. 699 proven. 2 refuted. 0 times theorem prover too weak. 1231 trivial. 0 not checked. [2018-07-24 12:21:29,444 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:21:29,444 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 12:21:29,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:21:29,461 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:21:30,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:21:30,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:21:30,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1932 backedges. 1115 proven. 6 refuted. 0 times theorem prover too weak. 811 trivial. 0 not checked. [2018-07-24 12:21:30,494 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:21:31,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1932 backedges. 1117 proven. 4 refuted. 0 times theorem prover too weak. 811 trivial. 0 not checked. [2018-07-24 12:21:31,265 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:21:31,266 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-07-24 12:21:31,267 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:21:31,268 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:21:31,269 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:21:31,269 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:21:31,269 INFO L87 Difference]: Start difference. First operand 9290 states and 10891 transitions. Second operand 9 states. [2018-07-24 12:21:36,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:21:36,674 INFO L93 Difference]: Finished difference Result 25824 states and 31006 transitions. [2018-07-24 12:21:36,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-24 12:21:36,674 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 884 [2018-07-24 12:21:36,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:21:36,756 INFO L225 Difference]: With dead ends: 25824 [2018-07-24 12:21:36,756 INFO L226 Difference]: Without dead ends: 13677 [2018-07-24 12:21:36,823 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3558 GetRequests, 3535 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2018-07-24 12:21:36,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13677 states. [2018-07-24 12:21:37,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13677 to 13459. [2018-07-24 12:21:37,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13459 states. [2018-07-24 12:21:37,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13459 states to 13459 states and 14495 transitions. [2018-07-24 12:21:37,115 INFO L78 Accepts]: Start accepts. Automaton has 13459 states and 14495 transitions. Word has length 884 [2018-07-24 12:21:37,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:21:37,117 INFO L471 AbstractCegarLoop]: Abstraction has 13459 states and 14495 transitions. [2018-07-24 12:21:37,117 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:21:37,117 INFO L276 IsEmpty]: Start isEmpty. Operand 13459 states and 14495 transitions. [2018-07-24 12:21:37,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1182 [2018-07-24 12:21:37,198 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:21:37,199 INFO L353 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:21:37,199 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:21:37,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1255393679, now seen corresponding path program 1 times [2018-07-24 12:21:37,200 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:21:37,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:21:37,201 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:21:37,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:21:37,202 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:21:37,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:21:38,450 WARN L169 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-07-24 12:21:38,771 WARN L169 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-07-24 12:21:39,171 WARN L169 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2018-07-24 12:21:41,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3076 backedges. 881 proven. 285 refuted. 0 times theorem prover too weak. 1910 trivial. 0 not checked. [2018-07-24 12:21:41,616 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:21:41,617 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 12:21:41,625 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:21:41,626 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:21:41,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:21:41,982 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:21:43,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3076 backedges. 765 proven. 2 refuted. 0 times theorem prover too weak. 2309 trivial. 0 not checked. [2018-07-24 12:21:43,117 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:21:43,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3076 backedges. 765 proven. 2 refuted. 0 times theorem prover too weak. 2309 trivial. 0 not checked. [2018-07-24 12:21:43,887 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:21:43,887 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 12:21:43,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:21:43,903 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:21:44,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:21:44,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:21:45,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3076 backedges. 765 proven. 2 refuted. 0 times theorem prover too weak. 2309 trivial. 0 not checked. [2018-07-24 12:21:45,690 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:21:46,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3076 backedges. 765 proven. 2 refuted. 0 times theorem prover too weak. 2309 trivial. 0 not checked. [2018-07-24 12:21:46,502 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:21:46,504 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5, 5, 5] total 22 [2018-07-24 12:21:46,504 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:21:46,506 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-24 12:21:46,506 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-24 12:21:46,506 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2018-07-24 12:21:46,507 INFO L87 Difference]: Start difference. First operand 13459 states and 14495 transitions. Second operand 16 states. [2018-07-24 12:21:50,977 WARN L169 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2018-07-24 12:21:57,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:21:57,686 INFO L93 Difference]: Finished difference Result 27111 states and 29255 transitions. [2018-07-24 12:21:57,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-07-24 12:21:57,686 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 1181 [2018-07-24 12:21:57,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:21:57,783 INFO L225 Difference]: With dead ends: 27111 [2018-07-24 12:21:57,784 INFO L226 Difference]: Without dead ends: 13663 [2018-07-24 12:21:57,847 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4804 GetRequests, 4742 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=844, Invalid=2816, Unknown=0, NotChecked=0, Total=3660 [2018-07-24 12:21:57,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13663 states. [2018-07-24 12:21:58,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13663 to 13374. [2018-07-24 12:21:58,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13374 states. [2018-07-24 12:21:58,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13374 states to 13374 states and 14117 transitions. [2018-07-24 12:21:58,189 INFO L78 Accepts]: Start accepts. Automaton has 13374 states and 14117 transitions. Word has length 1181 [2018-07-24 12:21:58,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:21:58,191 INFO L471 AbstractCegarLoop]: Abstraction has 13374 states and 14117 transitions. [2018-07-24 12:21:58,191 INFO L472 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-24 12:21:58,191 INFO L276 IsEmpty]: Start isEmpty. Operand 13374 states and 14117 transitions. [2018-07-24 12:21:58,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1259 [2018-07-24 12:21:58,240 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:21:58,241 INFO L353 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:21:58,241 INFO L414 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:21:58,242 INFO L82 PathProgramCache]: Analyzing trace with hash 37140571, now seen corresponding path program 1 times [2018-07-24 12:21:58,242 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:21:58,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:21:58,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:21:58,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:21:58,244 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:21:58,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:21:59,294 WARN L169 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-07-24 12:21:59,855 WARN L169 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2018-07-24 12:22:00,350 WARN L169 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2018-07-24 12:22:03,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2982 backedges. 847 proven. 353 refuted. 0 times theorem prover too weak. 1782 trivial. 0 not checked. [2018-07-24 12:22:03,764 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:22:03,765 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:22:03,772 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:22:03,773 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:22:04,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:22:04,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:22:05,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2982 backedges. 630 proven. 0 refuted. 0 times theorem prover too weak. 2352 trivial. 0 not checked. [2018-07-24 12:22:05,199 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:22:06,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2982 backedges. 210 proven. 576 refuted. 0 times theorem prover too weak. 2196 trivial. 0 not checked. [2018-07-24 12:22:06,022 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:22:06,023 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 5] total 16 [2018-07-24 12:22:06,023 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:22:06,024 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:22:06,024 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:22:06,024 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2018-07-24 12:22:06,024 INFO L87 Difference]: Start difference. First operand 13374 states and 14117 transitions. Second operand 5 states. [2018-07-24 12:22:10,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:22:10,912 INFO L93 Difference]: Finished difference Result 41372 states and 43846 transitions. [2018-07-24 12:22:10,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 12:22:10,912 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1258 [2018-07-24 12:22:10,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:22:11,045 INFO L225 Difference]: With dead ends: 41372 [2018-07-24 12:22:11,046 INFO L226 Difference]: Without dead ends: 28730 [2018-07-24 12:22:11,114 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2530 GetRequests, 2512 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2018-07-24 12:22:11,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28730 states. [2018-07-24 12:22:11,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28730 to 26779. [2018-07-24 12:22:11,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26779 states. [2018-07-24 12:22:11,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26779 states to 26779 states and 28256 transitions. [2018-07-24 12:22:11,589 INFO L78 Accepts]: Start accepts. Automaton has 26779 states and 28256 transitions. Word has length 1258 [2018-07-24 12:22:11,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:22:11,590 INFO L471 AbstractCegarLoop]: Abstraction has 26779 states and 28256 transitions. [2018-07-24 12:22:11,590 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:22:11,590 INFO L276 IsEmpty]: Start isEmpty. Operand 26779 states and 28256 transitions. [2018-07-24 12:22:11,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1398 [2018-07-24 12:22:11,664 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:22:11,665 INFO L353 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:22:11,665 INFO L414 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:22:11,665 INFO L82 PathProgramCache]: Analyzing trace with hash 645946050, now seen corresponding path program 1 times [2018-07-24 12:22:11,666 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:22:11,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:22:11,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:22:11,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:22:11,667 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:22:11,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:22:12,945 WARN L169 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-07-24 12:22:14,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3447 backedges. 986 proven. 353 refuted. 0 times theorem prover too weak. 2108 trivial. 0 not checked. [2018-07-24 12:22:14,713 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:22:14,713 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:22:14,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:22:14,727 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:22:15,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:22:15,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:22:16,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3447 backedges. 1845 proven. 2 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2018-07-24 12:22:16,251 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:22:19,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3447 backedges. 236 proven. 1741 refuted. 0 times theorem prover too weak. 1470 trivial. 0 not checked. [2018-07-24 12:22:19,299 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:22:19,299 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 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:22:19,317 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:22:19,317 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:22:20,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:22:20,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:22:21,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3447 backedges. 2378 proven. 14 refuted. 0 times theorem prover too weak. 1055 trivial. 0 not checked. [2018-07-24 12:22:21,459 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:22:21,637 WARN L169 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2018-07-24 12:22:24,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3447 backedges. 986 proven. 353 refuted. 0 times theorem prover too weak. 2108 trivial. 0 not checked. [2018-07-24 12:22:24,749 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:22:24,750 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 6, 5] total 23 [2018-07-24 12:22:24,750 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:22:24,752 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-24 12:22:24,752 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-24 12:22:24,753 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2018-07-24 12:22:24,753 INFO L87 Difference]: Start difference. First operand 26779 states and 28256 transitions. Second operand 14 states. [2018-07-24 12:22:39,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:22:39,996 INFO L93 Difference]: Finished difference Result 57604 states and 60780 transitions. [2018-07-24 12:22:39,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-07-24 12:22:39,996 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 1397 [2018-07-24 12:22:39,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:22:40,117 INFO L225 Difference]: With dead ends: 57604 [2018-07-24 12:22:40,117 INFO L226 Difference]: Without dead ends: 30236 [2018-07-24 12:22:40,198 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5655 GetRequests, 5598 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=508, Invalid=2354, Unknown=0, NotChecked=0, Total=2862 [2018-07-24 12:22:40,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30236 states. [2018-07-24 12:22:40,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30236 to 27658. [2018-07-24 12:22:40,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27658 states. [2018-07-24 12:22:40,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27658 states to 27658 states and 29098 transitions. [2018-07-24 12:22:40,613 INFO L78 Accepts]: Start accepts. Automaton has 27658 states and 29098 transitions. Word has length 1397 [2018-07-24 12:22:40,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:22:40,614 INFO L471 AbstractCegarLoop]: Abstraction has 27658 states and 29098 transitions. [2018-07-24 12:22:40,614 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-24 12:22:40,614 INFO L276 IsEmpty]: Start isEmpty. Operand 27658 states and 29098 transitions. [2018-07-24 12:22:40,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1489 [2018-07-24 12:22:40,694 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:22:40,695 INFO L353 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:22:40,695 INFO L414 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:22:40,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1843838081, now seen corresponding path program 1 times [2018-07-24 12:22:40,695 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:22:40,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:22:40,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:22:40,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:22:40,697 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:22:40,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:22:42,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4859 backedges. 848 proven. 534 refuted. 0 times theorem prover too weak. 3477 trivial. 0 not checked. [2018-07-24 12:22:42,639 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:22:42,639 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:22:42,655 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:22:42,656 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:22:43,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:22:43,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:22:43,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4859 backedges. 3255 proven. 2 refuted. 0 times theorem prover too weak. 1602 trivial. 0 not checked. [2018-07-24 12:22:43,986 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:22:44,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4859 backedges. 848 proven. 534 refuted. 0 times theorem prover too weak. 3477 trivial. 0 not checked. [2018-07-24 12:22:44,987 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:22:44,987 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 16 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 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:22:45,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:22:45,003 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:22:45,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:22:45,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:22:46,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4859 backedges. 3255 proven. 2 refuted. 0 times theorem prover too weak. 1602 trivial. 0 not checked. [2018-07-24 12:22:46,729 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:22:47,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4859 backedges. 848 proven. 534 refuted. 0 times theorem prover too weak. 3477 trivial. 0 not checked. [2018-07-24 12:22:47,764 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:22:47,765 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-07-24 12:22:47,765 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:22:47,767 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:22:47,767 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:22:47,767 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:22:47,767 INFO L87 Difference]: Start difference. First operand 27658 states and 29098 transitions. Second operand 9 states. [2018-07-24 12:22:53,049 WARN L169 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 7 [2018-07-24 12:22:53,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:22:53,641 INFO L93 Difference]: Finished difference Result 52725 states and 55904 transitions. [2018-07-24 12:22:53,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-24 12:22:53,642 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1488 [2018-07-24 12:22:53,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:22:53,765 INFO L225 Difference]: With dead ends: 52725 [2018-07-24 12:22:53,766 INFO L226 Difference]: Without dead ends: 28117 [2018-07-24 12:22:53,826 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5974 GetRequests, 5950 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2018-07-24 12:22:53,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28117 states. [2018-07-24 12:22:54,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28117 to 27660. [2018-07-24 12:22:54,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27660 states. [2018-07-24 12:22:54,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27660 states to 27660 states and 28870 transitions. [2018-07-24 12:22:54,281 INFO L78 Accepts]: Start accepts. Automaton has 27660 states and 28870 transitions. Word has length 1488 [2018-07-24 12:22:54,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:22:54,283 INFO L471 AbstractCegarLoop]: Abstraction has 27660 states and 28870 transitions. [2018-07-24 12:22:54,283 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:22:54,283 INFO L276 IsEmpty]: Start isEmpty. Operand 27660 states and 28870 transitions. [2018-07-24 12:22:54,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1547 [2018-07-24 12:22:54,345 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:22:54,346 INFO L353 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:22:54,347 INFO L414 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:22:54,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1433473007, now seen corresponding path program 1 times [2018-07-24 12:22:54,347 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:22:54,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:22:54,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:22:54,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:22:54,350 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:22:54,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:22:55,813 WARN L169 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-07-24 12:22:56,085 WARN L169 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-07-24 12:22:57,590 INFO L134 CoverageAnalysis]: Checked inductivity of 5219 backedges. 999 proven. 218 refuted. 0 times theorem prover too weak. 4002 trivial. 0 not checked. [2018-07-24 12:22:57,591 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:22:57,591 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:22:57,598 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:22:57,598 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:22:58,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:22:58,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:22:59,187 INFO L134 CoverageAnalysis]: Checked inductivity of 5219 backedges. 3625 proven. 6 refuted. 0 times theorem prover too weak. 1588 trivial. 0 not checked. [2018-07-24 12:22:59,188 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:23:01,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5219 backedges. 1556 proven. 607 refuted. 0 times theorem prover too weak. 3056 trivial. 0 not checked. [2018-07-24 12:23:01,466 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:23:01,466 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 18 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 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:23:01,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:23:01,483 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:23:02,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:23:02,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:23:03,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5219 backedges. 2504 proven. 872 refuted. 0 times theorem prover too weak. 1843 trivial. 0 not checked. [2018-07-24 12:23:03,891 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:23:04,410 WARN L169 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2018-07-24 12:23:04,605 WARN L169 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-07-24 12:23:05,109 WARN L169 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2018-07-24 12:23:07,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5219 backedges. 1407 proven. 170 refuted. 0 times theorem prover too weak. 3642 trivial. 0 not checked. [2018-07-24 12:23:07,930 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:23:07,931 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8, 7, 5] total 25 [2018-07-24 12:23:07,931 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:23:07,933 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-24 12:23:07,933 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-24 12:23:07,933 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2018-07-24 12:23:07,934 INFO L87 Difference]: Start difference. First operand 27660 states and 28870 transitions. Second operand 13 states. [2018-07-24 12:23:22,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:23:22,966 INFO L93 Difference]: Finished difference Result 57478 states and 60048 transitions. [2018-07-24 12:23:22,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-07-24 12:23:22,967 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 1546 [2018-07-24 12:23:22,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:23:23,064 INFO L225 Difference]: With dead ends: 57478 [2018-07-24 12:23:23,064 INFO L226 Difference]: Without dead ends: 33544 [2018-07-24 12:23:23,123 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6243 GetRequests, 6189 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=556, Invalid=2306, Unknown=0, NotChecked=0, Total=2862 [2018-07-24 12:23:23,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33544 states. [2018-07-24 12:23:23,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33544 to 31174. [2018-07-24 12:23:23,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31174 states. [2018-07-24 12:23:23,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31174 states to 31174 states and 32466 transitions. [2018-07-24 12:23:23,529 INFO L78 Accepts]: Start accepts. Automaton has 31174 states and 32466 transitions. Word has length 1546 [2018-07-24 12:23:23,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:23:23,530 INFO L471 AbstractCegarLoop]: Abstraction has 31174 states and 32466 transitions. [2018-07-24 12:23:23,530 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-24 12:23:23,530 INFO L276 IsEmpty]: Start isEmpty. Operand 31174 states and 32466 transitions. [2018-07-24 12:23:23,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1570 [2018-07-24 12:23:23,585 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:23:23,586 INFO L353 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:23:23,586 INFO L414 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:23:23,587 INFO L82 PathProgramCache]: Analyzing trace with hash 812443272, now seen corresponding path program 1 times [2018-07-24 12:23:23,587 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:23:23,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:23:23,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:23:23,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:23:23,588 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:23:23,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:23:26,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4985 backedges. 1397 proven. 170 refuted. 0 times theorem prover too weak. 3418 trivial. 0 not checked. [2018-07-24 12:23:26,338 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:23:26,338 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:23:26,345 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:23:26,346 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:23:26,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:23:26,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:23:28,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4985 backedges. 2443 proven. 2 refuted. 0 times theorem prover too weak. 2540 trivial. 0 not checked. [2018-07-24 12:23:28,128 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:23:31,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4985 backedges. 1397 proven. 170 refuted. 0 times theorem prover too weak. 3418 trivial. 0 not checked. [2018-07-24 12:23:31,631 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:23:31,632 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 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:23:31,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:23:31,649 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:23:32,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:23:32,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:23:33,133 WARN L169 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 16 [2018-07-24 12:23:34,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4985 backedges. 3278 proven. 2 refuted. 0 times theorem prover too weak. 1705 trivial. 0 not checked. [2018-07-24 12:23:34,175 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:23:36,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4985 backedges. 776 proven. 449 refuted. 0 times theorem prover too weak. 3760 trivial. 0 not checked. [2018-07-24 12:23:36,156 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:23:36,157 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5, 5, 5] total 18 [2018-07-24 12:23:36,157 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:23:36,159 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-24 12:23:36,159 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-24 12:23:36,159 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2018-07-24 12:23:36,160 INFO L87 Difference]: Start difference. First operand 31174 states and 32466 transitions. Second operand 11 states. [2018-07-24 12:23:40,121 WARN L169 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-07-24 12:23:45,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:23:45,640 INFO L93 Difference]: Finished difference Result 60264 states and 62892 transitions. [2018-07-24 12:23:45,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-07-24 12:23:45,640 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 1569 [2018-07-24 12:23:45,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:23:45,705 INFO L225 Difference]: With dead ends: 60264 [2018-07-24 12:23:45,705 INFO L226 Difference]: Without dead ends: 26601 [2018-07-24 12:23:45,769 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6331 GetRequests, 6287 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=357, Invalid=1449, Unknown=0, NotChecked=0, Total=1806 [2018-07-24 12:23:45,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26601 states. [2018-07-24 12:23:46,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26601 to 25808. [2018-07-24 12:23:46,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25808 states. [2018-07-24 12:23:46,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25808 states to 25808 states and 26683 transitions. [2018-07-24 12:23:46,371 INFO L78 Accepts]: Start accepts. Automaton has 25808 states and 26683 transitions. Word has length 1569 [2018-07-24 12:23:46,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:23:46,372 INFO L471 AbstractCegarLoop]: Abstraction has 25808 states and 26683 transitions. [2018-07-24 12:23:46,373 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-24 12:23:46,373 INFO L276 IsEmpty]: Start isEmpty. Operand 25808 states and 26683 transitions. [2018-07-24 12:23:46,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1703 [2018-07-24 12:23:46,422 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:23:46,423 INFO L353 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:23:46,423 INFO L414 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:23:46,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1987637093, now seen corresponding path program 1 times [2018-07-24 12:23:46,424 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:23:46,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:23:46,425 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:23:46,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:23:46,426 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:23:46,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:23:48,179 WARN L169 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-07-24 12:23:49,003 WARN L169 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 15 [2018-07-24 12:23:49,463 WARN L169 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2018-07-24 12:23:53,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5279 backedges. 2717 proven. 763 refuted. 0 times theorem prover too weak. 1799 trivial. 0 not checked. [2018-07-24 12:23:53,173 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:23:53,173 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:23:53,180 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:23:53,180 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:23:53,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:23:53,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:23:55,023 INFO L134 CoverageAnalysis]: Checked inductivity of 5279 backedges. 2329 proven. 2 refuted. 0 times theorem prover too weak. 2948 trivial. 0 not checked. [2018-07-24 12:23:55,024 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:23:56,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5279 backedges. 1610 proven. 101 refuted. 0 times theorem prover too weak. 3568 trivial. 0 not checked. [2018-07-24 12:23:56,939 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:23:56,939 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 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:23:56,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:23:56,955 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:23:58,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:23:58,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:23:59,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5279 backedges. 3400 proven. 2 refuted. 0 times theorem prover too weak. 1877 trivial. 0 not checked. [2018-07-24 12:23:59,503 INFO L316 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2018-07-24 12:23:59,767 WARN L177 SmtUtils]: Removed 1 from assertion stack [2018-07-24 12:23:59,768 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-07-24 12:23:59,969 WARN L512 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:23:59,970 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 12:23:59,975 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 12:23:59,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 12:23:59 BoogieIcfgContainer [2018-07-24 12:23:59,975 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 12:23:59,976 INFO L168 Benchmark]: Toolchain (without parser) took 226694.43 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -127.0 MB). Peak memory consumption was 2.4 GB. Max. memory is 7.1 GB. [2018-07-24 12:23:59,977 INFO L168 Benchmark]: CDTParser took 0.20 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 12:23:59,977 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1153.08 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 105.7 MB). Peak memory consumption was 105.7 MB. Max. memory is 7.1 GB. [2018-07-24 12:23:59,978 INFO L168 Benchmark]: Boogie Procedure Inliner took 192.39 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-07-24 12:23:59,978 INFO L168 Benchmark]: Boogie Preprocessor took 434.48 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 815.8 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -964.0 MB). Peak memory consumption was 61.3 MB. Max. memory is 7.1 GB. [2018-07-24 12:23:59,979 INFO L168 Benchmark]: RCFGBuilder took 6531.79 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: 280.7 MB). Peak memory consumption was 280.7 MB. Max. memory is 7.1 GB. [2018-07-24 12:23:59,980 INFO L168 Benchmark]: TraceAbstraction took 218377.94 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.7 GB). Free memory was 2.0 GB in the beginning and 1.5 GB in the end (delta: 429.4 MB). Peak memory consumption was 2.2 GB. Max. memory is 7.1 GB. [2018-07-24 12:23:59,984 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 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. * CACSL2BoogieTranslator took 1153.08 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 105.7 MB). Peak memory consumption was 105.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 192.39 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 434.48 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 815.8 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -964.0 MB). Peak memory consumption was 61.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 6531.79 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: 280.7 MB). Peak memory consumption was 280.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 218377.94 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.7 GB). Free memory was 2.0 GB in the beginning and 1.5 GB in the end (delta: 429.4 MB). Peak memory consumption was 2.2 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 97]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 97). Cancelled while BasicCegarLoop was analyzing trace of length 1703 with TraceHistMax 10, while TraceCheckSpWp was constructing backward predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 31. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 410 locations, 1 error locations. TIMEOUT Result, 218.3s OverallTime, 15 OverallIterations, 10 TraceHistogramMax, 118.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2053 SDtfs, 34650 SDslu, 3366 SDs, 0 SdLazy, 70799 SolverSat, 10132 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 92.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42115 GetRequests, 41730 SyntacticMatches, 44 SemanticMatches, 341 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3237 ImplicationChecksByTransitivity, 19.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31174occurred in iteration=13, 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: 4.0s AutomataMinimizationTime, 14 MinimizatonAttempts, 9249 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.1s SsaConstructionTime, 10.0s SatisfiabilityAnalysisTime, 56.5s InterpolantComputationTime, 32721 NumberOfCodeBlocks, 32721 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 53510 ConstructedInterpolants, 7 QuantifiedInterpolants, 194611183 SizeOfPredicates, 14 NumberOfNonLiveVariables, 27874 ConjunctsInSsa, 166 ConjunctsInUnsatCore, 52 InterpolantComputations, 7 PerfectInterpolantSequences, 131679/141132 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem16_label44_false-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_12-23-59-996.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem16_label44_false-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_12-23-59-996.csv Completed graceful shutdown