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/Problem15_label41_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 12:12:15,474 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 12:12:15,476 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 12:12:15,494 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 12:12:15,494 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 12:12:15,495 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 12:12:15,497 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 12:12:15,499 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 12:12:15,503 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 12:12:15,504 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 12:12:15,505 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 12:12:15,514 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 12:12:15,515 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 12:12:15,516 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 12:12:15,519 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 12:12:15,523 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 12:12:15,525 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 12:12:15,529 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 12:12:15,534 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 12:12:15,538 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 12:12:15,539 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 12:12:15,542 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 12:12:15,548 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 12:12:15,548 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 12:12:15,549 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 12:12:15,550 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 12:12:15,551 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 12:12:15,552 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 12:12:15,553 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 12:12:15,557 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 12:12:15,557 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 12:12:15,558 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 12:12:15,558 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 12:12:15,558 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 12:12:15,560 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 12:12:15,561 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 12:12:15,562 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 12:12:15,589 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 12:12:15,590 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 12:12:15,591 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 12:12:15,592 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 12:12:15,592 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 12:12:15,592 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 12:12:15,592 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 12:12:15,593 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 12:12:15,593 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 12:12:15,593 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 12:12:15,593 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 12:12:15,594 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 12:12:15,594 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 12:12:15,595 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 12:12:15,595 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 12:12:15,595 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 12:12:15,596 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 12:12:15,597 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 12:12:15,597 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 12:12:15,597 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 12:12:15,597 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 12:12:15,598 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 12:12:15,598 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 12:12:15,598 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:12:15,599 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 12:12:15,599 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 12:12:15,599 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 12:12:15,599 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 12:12:15,599 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 12:12:15,600 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 12:12:15,600 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 12:12:15,600 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 12:12:15,600 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 12:12:15,651 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 12:12:15,665 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 12:12:15,672 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 12:12:15,674 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 12:12:15,675 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 12:12:15,675 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label41_false-unreach-call.c [2018-07-24 12:12:16,048 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2dc970fd2/26bec8c87bcb4b1fa2b755b0886fb619/FLAG11caf5e81 [2018-07-24 12:12:16,422 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 12:12:16,423 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label41_false-unreach-call.c [2018-07-24 12:12:16,459 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2dc970fd2/26bec8c87bcb4b1fa2b755b0886fb619/FLAG11caf5e81 [2018-07-24 12:12:16,481 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2dc970fd2/26bec8c87bcb4b1fa2b755b0886fb619 [2018-07-24 12:12:16,494 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 12:12:16,496 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 12:12:16,497 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 12:12:16,497 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 12:12:16,505 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 12:12:16,507 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:12:16" (1/1) ... [2018-07-24 12:12:16,510 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e9674d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:12:16, skipping insertion in model container [2018-07-24 12:12:16,511 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:12:16" (1/1) ... [2018-07-24 12:12:16,773 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 12:12:17,396 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:12:17,415 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 12:12:17,708 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:12:17,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:12:17 WrapperNode [2018-07-24 12:12:17,829 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 12:12:17,830 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 12:12:17,830 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 12:12:17,830 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 12:12:17,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:12:17" (1/1) ... [2018-07-24 12:12:17,890 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:12:17" (1/1) ... [2018-07-24 12:12:18,127 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 12:12:18,127 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 12:12:18,128 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 12:12:18,128 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 12:12:18,554 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:12:17" (1/1) ... [2018-07-24 12:12:18,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:12:17" (1/1) ... [2018-07-24 12:12:18,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:12:17" (1/1) ... [2018-07-24 12:12:18,581 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:12:17" (1/1) ... [2018-07-24 12:12:18,668 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:12:17" (1/1) ... [2018-07-24 12:12:18,689 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:12:17" (1/1) ... [2018-07-24 12:12:18,739 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:12:17" (1/1) ... [2018-07-24 12:12:18,763 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 12:12:18,765 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 12:12:18,765 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 12:12:18,766 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 12:12:18,767 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:12:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:12:18,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 12:12:18,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 12:12:18,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 12:12:18,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 12:12:18,835 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 12:12:18,835 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 12:12:18,836 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 12:12:18,836 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 12:12:18,836 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 12:12:18,836 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 12:12:26,587 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 12:12:26,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:12:26 BoogieIcfgContainer [2018-07-24 12:12:26,588 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 12:12:26,589 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 12:12:26,590 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 12:12:26,593 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 12:12:26,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 12:12:16" (1/3) ... [2018-07-24 12:12:26,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30e0d7be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:12:26, skipping insertion in model container [2018-07-24 12:12:26,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:12:17" (2/3) ... [2018-07-24 12:12:26,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30e0d7be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:12:26, skipping insertion in model container [2018-07-24 12:12:26,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:12:26" (3/3) ... [2018-07-24 12:12:26,597 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label41_false-unreach-call.c [2018-07-24 12:12:26,607 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 12:12:26,615 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 12:12:26,671 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 12:12:26,671 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 12:12:26,671 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 12:12:26,672 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 12:12:26,672 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 12:12:26,672 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 12:12:26,672 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 12:12:26,672 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 12:12:26,673 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 12:12:26,711 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states. [2018-07-24 12:12:26,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-07-24 12:12:26,720 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:12:26,721 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] [2018-07-24 12:12:26,721 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 12:12:26,726 INFO L82 PathProgramCache]: Analyzing trace with hash -154046164, now seen corresponding path program 1 times [2018-07-24 12:12:26,732 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:12:26,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:12:26,782 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:12:26,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:12:26,782 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:12:26,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:12:27,166 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 12:12:27,170 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:12:27,170 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 12:12:27,171 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:12:27,176 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 12:12:27,192 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 12:12:27,193 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:12:27,196 INFO L87 Difference]: Start difference. First operand 438 states. Second operand 4 states. [2018-07-24 12:12:35,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:12:35,266 INFO L93 Difference]: Finished difference Result 1501 states and 2761 transitions. [2018-07-24 12:12:35,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 12:12:35,268 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2018-07-24 12:12:35,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:12:35,297 INFO L225 Difference]: With dead ends: 1501 [2018-07-24 12:12:35,298 INFO L226 Difference]: Without dead ends: 1057 [2018-07-24 12:12:35,310 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:12:35,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2018-07-24 12:12:35,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 744. [2018-07-24 12:12:35,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2018-07-24 12:12:35,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1125 transitions. [2018-07-24 12:12:35,466 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1125 transitions. Word has length 32 [2018-07-24 12:12:35,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:12:35,467 INFO L471 AbstractCegarLoop]: Abstraction has 744 states and 1125 transitions. [2018-07-24 12:12:35,467 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 12:12:35,467 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1125 transitions. [2018-07-24 12:12:35,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-07-24 12:12:35,477 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:12:35,478 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:12:35,478 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 12:12:35,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1535741161, now seen corresponding path program 1 times [2018-07-24 12:12:35,480 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:12:35,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:12:35,481 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:12:35,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:12:35,483 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:12:35,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:12:35,824 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:12:35,825 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:12:35,825 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-07-24 12:12:35,825 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:12:35,828 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:12:35,828 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:12:35,829 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-07-24 12:12:35,829 INFO L87 Difference]: Start difference. First operand 744 states and 1125 transitions. Second operand 5 states. [2018-07-24 12:12:49,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:12:49,790 INFO L93 Difference]: Finished difference Result 2390 states and 3583 transitions. [2018-07-24 12:12:49,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:12:49,792 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 102 [2018-07-24 12:12:49,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:12:49,803 INFO L225 Difference]: With dead ends: 2390 [2018-07-24 12:12:49,803 INFO L226 Difference]: Without dead ends: 1652 [2018-07-24 12:12:49,808 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-07-24 12:12:49,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2018-07-24 12:12:49,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 1644. [2018-07-24 12:12:49,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1644 states. [2018-07-24 12:12:49,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 2399 transitions. [2018-07-24 12:12:49,871 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 2399 transitions. Word has length 102 [2018-07-24 12:12:49,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:12:49,873 INFO L471 AbstractCegarLoop]: Abstraction has 1644 states and 2399 transitions. [2018-07-24 12:12:49,873 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:12:49,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 2399 transitions. [2018-07-24 12:12:49,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-07-24 12:12:49,882 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:12:49,883 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:12:49,883 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 12:12:49,884 INFO L82 PathProgramCache]: Analyzing trace with hash 731355766, now seen corresponding path program 1 times [2018-07-24 12:12:49,884 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:12:49,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:12:49,886 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:12:49,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:12:49,886 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:12:49,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:12:50,288 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:12:50,289 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:12:50,289 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:12:50,289 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:12:50,290 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:12:50,290 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:12:50,291 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:12:50,291 INFO L87 Difference]: Start difference. First operand 1644 states and 2399 transitions. Second operand 6 states. [2018-07-24 12:12:57,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:12:57,708 INFO L93 Difference]: Finished difference Result 4245 states and 6731 transitions. [2018-07-24 12:12:57,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:12:57,710 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 107 [2018-07-24 12:12:57,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:12:57,728 INFO L225 Difference]: With dead ends: 4245 [2018-07-24 12:12:57,728 INFO L226 Difference]: Without dead ends: 2916 [2018-07-24 12:12:57,736 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:12:57,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2916 states. [2018-07-24 12:12:57,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2916 to 2869. [2018-07-24 12:12:57,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2869 states. [2018-07-24 12:12:57,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2869 states to 2869 states and 4001 transitions. [2018-07-24 12:12:57,832 INFO L78 Accepts]: Start accepts. Automaton has 2869 states and 4001 transitions. Word has length 107 [2018-07-24 12:12:57,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:12:57,835 INFO L471 AbstractCegarLoop]: Abstraction has 2869 states and 4001 transitions. [2018-07-24 12:12:57,835 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:12:57,835 INFO L276 IsEmpty]: Start isEmpty. Operand 2869 states and 4001 transitions. [2018-07-24 12:12:57,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-07-24 12:12:57,842 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:12:57,842 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:12:57,842 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 12:12:57,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1008970966, now seen corresponding path program 1 times [2018-07-24 12:12:57,843 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:12:57,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:12:57,845 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:12:57,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:12:57,845 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:12:57,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:12:58,003 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:12:58,003 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:12:58,003 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 12:12:58,003 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:12:58,004 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 12:12:58,004 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 12:12:58,004 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:12:58,005 INFO L87 Difference]: Start difference. First operand 2869 states and 4001 transitions. Second operand 4 states. [2018-07-24 12:13:03,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:13:03,316 INFO L93 Difference]: Finished difference Result 7280 states and 10700 transitions. [2018-07-24 12:13:03,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 12:13:03,318 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 113 [2018-07-24 12:13:03,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:13:03,342 INFO L225 Difference]: With dead ends: 7280 [2018-07-24 12:13:03,343 INFO L226 Difference]: Without dead ends: 4726 [2018-07-24 12:13:03,356 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:13:03,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4726 states. [2018-07-24 12:13:03,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4726 to 4723. [2018-07-24 12:13:03,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4723 states. [2018-07-24 12:13:03,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4723 states to 4723 states and 6423 transitions. [2018-07-24 12:13:03,476 INFO L78 Accepts]: Start accepts. Automaton has 4723 states and 6423 transitions. Word has length 113 [2018-07-24 12:13:03,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:13:03,477 INFO L471 AbstractCegarLoop]: Abstraction has 4723 states and 6423 transitions. [2018-07-24 12:13:03,477 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 12:13:03,478 INFO L276 IsEmpty]: Start isEmpty. Operand 4723 states and 6423 transitions. [2018-07-24 12:13:03,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-07-24 12:13:03,480 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:13:03,481 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:13:03,481 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 12:13:03,481 INFO L82 PathProgramCache]: Analyzing trace with hash -367623851, now seen corresponding path program 1 times [2018-07-24 12:13:03,481 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:13:03,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:13:03,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:13:03,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:13:03,482 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:13:03,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:13:03,659 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:13:03,659 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:13:03,659 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 12:13:03,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:13:03,679 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:13:03,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:13:03,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:13:04,024 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:13:04,025 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:13:04,711 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:13:04,742 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:13:04,742 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 11 [2018-07-24 12:13:04,743 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:13:04,743 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:13:04,744 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:13:04,744 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:13:04,744 INFO L87 Difference]: Start difference. First operand 4723 states and 6423 transitions. Second operand 6 states. [2018-07-24 12:13:14,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:13:14,867 INFO L93 Difference]: Finished difference Result 15339 states and 22086 transitions. [2018-07-24 12:13:14,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:13:14,867 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 128 [2018-07-24 12:13:14,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:13:14,934 INFO L225 Difference]: With dead ends: 15339 [2018-07-24 12:13:14,934 INFO L226 Difference]: Without dead ends: 10931 [2018-07-24 12:13:14,962 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 254 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-07-24 12:13:14,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10931 states. [2018-07-24 12:13:15,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10931 to 10881. [2018-07-24 12:13:15,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10881 states. [2018-07-24 12:13:15,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10881 states to 10881 states and 15174 transitions. [2018-07-24 12:13:15,264 INFO L78 Accepts]: Start accepts. Automaton has 10881 states and 15174 transitions. Word has length 128 [2018-07-24 12:13:15,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:13:15,265 INFO L471 AbstractCegarLoop]: Abstraction has 10881 states and 15174 transitions. [2018-07-24 12:13:15,265 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:13:15,265 INFO L276 IsEmpty]: Start isEmpty. Operand 10881 states and 15174 transitions. [2018-07-24 12:13:15,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-07-24 12:13:15,276 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:13:15,277 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:13:15,277 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 12:13:15,277 INFO L82 PathProgramCache]: Analyzing trace with hash 571538736, now seen corresponding path program 1 times [2018-07-24 12:13:15,278 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:13:15,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:13:15,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:13:15,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:13:15,279 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:13:15,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:13:16,010 WARN L169 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 12 [2018-07-24 12:13:16,100 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 50 proven. 74 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:13:16,101 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:13:16,101 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 12:13:16,109 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:13:16,109 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:13:16,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:13:16,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:13:16,555 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-07-24 12:13:16,556 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:13:17,020 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2018-07-24 12:13:17,421 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 50 proven. 74 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:13:17,443 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:13:17,443 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-07-24 12:13:17,443 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:13:17,444 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:13:17,444 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:13:17,444 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:13:17,445 INFO L87 Difference]: Start difference. First operand 10881 states and 15174 transitions. Second operand 5 states. [2018-07-24 12:13:29,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:13:29,392 INFO L93 Difference]: Finished difference Result 23504 states and 33335 transitions. [2018-07-24 12:13:29,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:13:29,393 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 192 [2018-07-24 12:13:29,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:13:29,451 INFO L225 Difference]: With dead ends: 23504 [2018-07-24 12:13:29,451 INFO L226 Difference]: Without dead ends: 12937 [2018-07-24 12:13:29,507 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 379 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2018-07-24 12:13:29,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12937 states. [2018-07-24 12:13:30,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12937 to 12846. [2018-07-24 12:13:30,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12846 states. [2018-07-24 12:13:30,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12846 states to 12846 states and 17986 transitions. [2018-07-24 12:13:30,047 INFO L78 Accepts]: Start accepts. Automaton has 12846 states and 17986 transitions. Word has length 192 [2018-07-24 12:13:30,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:13:30,047 INFO L471 AbstractCegarLoop]: Abstraction has 12846 states and 17986 transitions. [2018-07-24 12:13:30,048 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:13:30,048 INFO L276 IsEmpty]: Start isEmpty. Operand 12846 states and 17986 transitions. [2018-07-24 12:13:30,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-07-24 12:13:30,062 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:13:30,062 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:13:30,062 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 12:13:30,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1168803889, now seen corresponding path program 1 times [2018-07-24 12:13:30,063 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:13:30,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:13:30,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:13:30,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:13:30,064 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:13:30,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:13:30,681 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 51 proven. 66 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-07-24 12:13:30,682 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:13:30,682 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:13:30,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:13:30,698 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:13:30,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:13:30,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:13:30,946 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 51 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-07-24 12:13:30,947 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:13:31,511 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-07-24 12:13:31,532 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:13:31,532 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2018-07-24 12:13:31,532 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:13:31,533 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:13:31,533 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:13:31,533 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:13:31,533 INFO L87 Difference]: Start difference. First operand 12846 states and 17986 transitions. Second operand 5 states. [2018-07-24 12:13:36,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:13:36,282 INFO L93 Difference]: Finished difference Result 29391 states and 43599 transitions. [2018-07-24 12:13:36,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 12:13:36,287 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 201 [2018-07-24 12:13:36,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:13:36,363 INFO L225 Difference]: With dead ends: 29391 [2018-07-24 12:13:36,363 INFO L226 Difference]: Without dead ends: 16859 [2018-07-24 12:13:36,415 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 400 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-07-24 12:13:36,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16859 states. [2018-07-24 12:13:36,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16859 to 16236. [2018-07-24 12:13:36,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16236 states. [2018-07-24 12:13:36,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16236 states to 16236 states and 21349 transitions. [2018-07-24 12:13:36,832 INFO L78 Accepts]: Start accepts. Automaton has 16236 states and 21349 transitions. Word has length 201 [2018-07-24 12:13:36,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:13:36,833 INFO L471 AbstractCegarLoop]: Abstraction has 16236 states and 21349 transitions. [2018-07-24 12:13:36,833 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:13:36,833 INFO L276 IsEmpty]: Start isEmpty. Operand 16236 states and 21349 transitions. [2018-07-24 12:13:36,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2018-07-24 12:13:36,856 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:13:36,856 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 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 12:13:36,857 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 12:13:36,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1887987367, now seen corresponding path program 1 times [2018-07-24 12:13:36,857 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:13:36,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:13:36,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:13:36,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:13:36,858 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:13:36,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:13:37,937 WARN L169 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-07-24 12:13:38,365 WARN L169 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2018-07-24 12:13:38,713 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 87 proven. 222 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:13:38,714 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:13:38,714 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 12:13:38,723 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:13:38,723 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:13:38,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:13:38,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:13:39,428 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 262 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-07-24 12:13:39,429 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:13:39,929 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 85 proven. 224 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:13:39,949 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:13:39,950 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 12:13:39,966 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:13:39,966 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:13:40,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:13:40,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:13:40,446 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 212 proven. 26 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-07-24 12:13:40,446 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:13:40,978 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 85 proven. 224 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:13:40,980 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:13:40,980 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9, 8, 9] total 24 [2018-07-24 12:13:40,980 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:13:40,981 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-24 12:13:40,981 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-24 12:13:40,982 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2018-07-24 12:13:40,982 INFO L87 Difference]: Start difference. First operand 16236 states and 21349 transitions. Second operand 14 states. [2018-07-24 12:14:04,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:14:04,722 INFO L93 Difference]: Finished difference Result 39962 states and 53426 transitions. [2018-07-24 12:14:04,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-07-24 12:14:04,723 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 288 [2018-07-24 12:14:04,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:14:04,824 INFO L225 Difference]: With dead ends: 39962 [2018-07-24 12:14:04,824 INFO L226 Difference]: Without dead ends: 22755 [2018-07-24 12:14:04,899 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1228 GetRequests, 1166 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=779, Invalid=2527, Unknown=0, NotChecked=0, Total=3306 [2018-07-24 12:14:04,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22755 states. [2018-07-24 12:14:05,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22755 to 22518. [2018-07-24 12:14:05,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22518 states. [2018-07-24 12:14:05,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22518 states to 22518 states and 29739 transitions. [2018-07-24 12:14:05,373 INFO L78 Accepts]: Start accepts. Automaton has 22518 states and 29739 transitions. Word has length 288 [2018-07-24 12:14:05,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:14:05,374 INFO L471 AbstractCegarLoop]: Abstraction has 22518 states and 29739 transitions. [2018-07-24 12:14:05,374 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-24 12:14:05,374 INFO L276 IsEmpty]: Start isEmpty. Operand 22518 states and 29739 transitions. [2018-07-24 12:14:05,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2018-07-24 12:14:05,398 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:14:05,399 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:14:05,399 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 12:14:05,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1269079922, now seen corresponding path program 1 times [2018-07-24 12:14:05,400 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:14:05,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:14:05,400 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:14:05,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:14:05,401 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:14:05,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:14:06,612 WARN L169 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-07-24 12:14:07,090 WARN L169 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2018-07-24 12:14:07,480 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 87 proven. 222 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:14:07,480 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:14:07,480 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 12:14:07,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:14:07,488 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:14:07,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:14:07,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:14:07,883 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 262 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-07-24 12:14:07,884 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:14:08,605 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 85 proven. 224 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:14:08,626 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:14:08,626 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 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:14:08,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:14:08,643 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:14:08,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:14:08,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:14:09,302 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 212 proven. 26 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-07-24 12:14:09,302 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:14:09,875 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 85 proven. 224 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:14:09,878 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:14:09,878 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9, 8, 9] total 24 [2018-07-24 12:14:09,878 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:14:09,880 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-24 12:14:09,880 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-24 12:14:09,880 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2018-07-24 12:14:09,881 INFO L87 Difference]: Start difference. First operand 22518 states and 29739 transitions. Second operand 14 states. [2018-07-24 12:14:38,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:14:38,622 INFO L93 Difference]: Finished difference Result 48798 states and 64702 transitions. [2018-07-24 12:14:38,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-07-24 12:14:38,623 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 373 [2018-07-24 12:14:38,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:14:38,713 INFO L225 Difference]: With dead ends: 48798 [2018-07-24 12:14:38,714 INFO L226 Difference]: Without dead ends: 25176 [2018-07-24 12:14:38,803 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1574 GetRequests, 1506 SyntacticMatches, 9 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=862, Invalid=2798, Unknown=0, NotChecked=0, Total=3660 [2018-07-24 12:14:38,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25176 states. [2018-07-24 12:14:39,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25176 to 24289. [2018-07-24 12:14:39,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24289 states. [2018-07-24 12:14:39,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24289 states to 24289 states and 31482 transitions. [2018-07-24 12:14:39,680 INFO L78 Accepts]: Start accepts. Automaton has 24289 states and 31482 transitions. Word has length 373 [2018-07-24 12:14:39,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:14:39,681 INFO L471 AbstractCegarLoop]: Abstraction has 24289 states and 31482 transitions. [2018-07-24 12:14:39,681 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-24 12:14:39,681 INFO L276 IsEmpty]: Start isEmpty. Operand 24289 states and 31482 transitions. [2018-07-24 12:14:39,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2018-07-24 12:14:39,713 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:14:39,713 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:14:39,713 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 12:14:39,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1978372908, now seen corresponding path program 1 times [2018-07-24 12:14:39,714 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:14:39,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:14:39,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:14:39,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:14:39,716 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:14:39,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:14:40,124 WARN L169 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 8 [2018-07-24 12:14:40,572 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 85 proven. 215 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-07-24 12:14:40,572 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:14:40,572 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:14:40,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:14:40,582 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:14:40,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:14:40,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:14:40,916 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 286 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-07-24 12:14:40,916 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:14:41,255 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 159 proven. 78 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-07-24 12:14:41,277 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:14:41,277 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 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:14:41,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:14:41,296 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:14:41,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:14:41,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:14:41,986 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 208 proven. 2 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2018-07-24 12:14:41,986 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:14:43,565 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 83 proven. 148 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2018-07-24 12:14:43,568 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:14:43,568 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5, 5, 5] total 17 [2018-07-24 12:14:43,568 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:14:43,569 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-24 12:14:43,569 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-24 12:14:43,569 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2018-07-24 12:14:43,570 INFO L87 Difference]: Start difference. First operand 24289 states and 31482 transitions. Second operand 13 states. [2018-07-24 12:14:55,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:14:55,852 INFO L93 Difference]: Finished difference Result 50844 states and 68939 transitions. [2018-07-24 12:14:55,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-07-24 12:14:55,853 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 430 [2018-07-24 12:14:55,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:14:55,918 INFO L225 Difference]: With dead ends: 50844 [2018-07-24 12:14:55,918 INFO L226 Difference]: Without dead ends: 26889 [2018-07-24 12:14:56,006 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1777 GetRequests, 1730 SyntacticMatches, 9 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=408, Invalid=1152, Unknown=0, NotChecked=0, Total=1560 [2018-07-24 12:14:56,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26889 states. [2018-07-24 12:14:56,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26889 to 26137. [2018-07-24 12:14:56,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26137 states. [2018-07-24 12:14:56,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26137 states to 26137 states and 31039 transitions. [2018-07-24 12:14:56,487 INFO L78 Accepts]: Start accepts. Automaton has 26137 states and 31039 transitions. Word has length 430 [2018-07-24 12:14:56,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:14:56,488 INFO L471 AbstractCegarLoop]: Abstraction has 26137 states and 31039 transitions. [2018-07-24 12:14:56,488 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-24 12:14:56,488 INFO L276 IsEmpty]: Start isEmpty. Operand 26137 states and 31039 transitions. [2018-07-24 12:14:56,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2018-07-24 12:14:56,518 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:14:56,519 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:14:56,519 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 12:14:56,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1330059277, now seen corresponding path program 1 times [2018-07-24 12:14:56,519 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:14:56,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:14:56,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:14:56,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:14:56,521 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:14:56,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:14:56,999 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2018-07-24 12:14:57,000 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:14:57,000 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:14:57,000 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:14:57,001 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:14:57,001 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:14:57,001 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:14:57,003 INFO L87 Difference]: Start difference. First operand 26137 states and 31039 transitions. Second operand 3 states. [2018-07-24 12:15:01,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:15:01,605 INFO L93 Difference]: Finished difference Result 59689 states and 73021 transitions. [2018-07-24 12:15:01,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:15:01,606 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 546 [2018-07-24 12:15:01,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:15:01,682 INFO L225 Difference]: With dead ends: 59689 [2018-07-24 12:15:01,683 INFO L226 Difference]: Without dead ends: 33866 [2018-07-24 12:15:01,740 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:15:01,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33866 states. [2018-07-24 12:15:02,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33866 to 33851. [2018-07-24 12:15:02,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33851 states. [2018-07-24 12:15:02,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33851 states to 33851 states and 40351 transitions. [2018-07-24 12:15:02,269 INFO L78 Accepts]: Start accepts. Automaton has 33851 states and 40351 transitions. Word has length 546 [2018-07-24 12:15:02,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:15:02,270 INFO L471 AbstractCegarLoop]: Abstraction has 33851 states and 40351 transitions. [2018-07-24 12:15:02,271 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:15:02,271 INFO L276 IsEmpty]: Start isEmpty. Operand 33851 states and 40351 transitions. [2018-07-24 12:15:02,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2018-07-24 12:15:02,290 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:15:02,291 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:15:02,291 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 12:15:02,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1043508644, now seen corresponding path program 1 times [2018-07-24 12:15:02,291 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:15:02,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:15:02,292 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:15:02,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:15:02,293 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:15:02,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:15:03,529 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 327 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-07-24 12:15:03,529 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:15:03,529 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:15:03,536 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:15:03,537 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:15:03,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:15:03,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:15:03,920 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 327 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-07-24 12:15:03,921 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:15:04,254 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 327 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-07-24 12:15:04,276 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:15:04,277 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 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:15:04,292 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:15:04,292 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:15:04,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:15:04,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:15:05,173 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 327 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-07-24 12:15:05,173 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:15:05,329 WARN L169 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-07-24 12:15:05,856 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 327 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-07-24 12:15:05,858 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:15:05,858 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-07-24 12:15:05,858 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:15:05,859 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:15:05,860 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:15:05,860 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:15:05,860 INFO L87 Difference]: Start difference. First operand 33851 states and 40351 transitions. Second operand 9 states. [2018-07-24 12:15:15,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:15:15,806 INFO L93 Difference]: Finished difference Result 68574 states and 82637 transitions. [2018-07-24 12:15:15,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-07-24 12:15:15,806 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 558 [2018-07-24 12:15:15,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:15:15,914 INFO L225 Difference]: With dead ends: 68574 [2018-07-24 12:15:15,915 INFO L226 Difference]: Without dead ends: 35037 [2018-07-24 12:15:15,994 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2260 GetRequests, 2233 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2018-07-24 12:15:16,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35037 states. [2018-07-24 12:15:16,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35037 to 34643. [2018-07-24 12:15:16,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34643 states. [2018-07-24 12:15:16,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34643 states to 34643 states and 40033 transitions. [2018-07-24 12:15:16,607 INFO L78 Accepts]: Start accepts. Automaton has 34643 states and 40033 transitions. Word has length 558 [2018-07-24 12:15:16,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:15:16,608 INFO L471 AbstractCegarLoop]: Abstraction has 34643 states and 40033 transitions. [2018-07-24 12:15:16,608 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:15:16,608 INFO L276 IsEmpty]: Start isEmpty. Operand 34643 states and 40033 transitions. [2018-07-24 12:15:16,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 567 [2018-07-24 12:15:16,625 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:15:16,625 INFO L353 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:15:16,625 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 12:15:16,626 INFO L82 PathProgramCache]: Analyzing trace with hash 204530485, now seen corresponding path program 1 times [2018-07-24 12:15:16,626 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:15:16,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:15:16,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:15:16,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:15:16,627 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:15:16,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:15:17,087 WARN L169 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2018-07-24 12:15:17,460 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 314 proven. 2 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-07-24 12:15:17,460 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:15:17,460 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 12:15:17,467 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:15:17,468 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:15:17,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:15:17,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:15:24,649 WARN L169 SmtUtils]: Spent 6.76 s on a formula simplification. DAG size of input: 444 DAG size of output: 29 [2018-07-24 12:15:25,240 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 467 trivial. 0 not checked. [2018-07-24 12:15:25,240 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:15:25,437 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 467 trivial. 0 not checked. [2018-07-24 12:15:25,457 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 12:15:25,457 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2018-07-24 12:15:25,457 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:15:25,458 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:15:25,458 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:15:25,458 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-07-24 12:15:25,458 INFO L87 Difference]: Start difference. First operand 34643 states and 40033 transitions. Second operand 3 states. [2018-07-24 12:16:06,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:16:06,492 INFO L93 Difference]: Finished difference Result 91633 states and 107193 transitions. [2018-07-24 12:16:06,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:16:06,493 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 566 [2018-07-24 12:16:06,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:16:06,568 INFO L225 Difference]: With dead ends: 91633 [2018-07-24 12:16:06,568 INFO L226 Difference]: Without dead ends: 39183 [2018-07-24 12:16:06,670 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1137 GetRequests, 1130 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-07-24 12:16:06,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39183 states. [2018-07-24 12:16:07,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39183 to 37176. [2018-07-24 12:16:07,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37176 states. [2018-07-24 12:16:07,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37176 states to 37176 states and 41042 transitions. [2018-07-24 12:16:07,197 INFO L78 Accepts]: Start accepts. Automaton has 37176 states and 41042 transitions. Word has length 566 [2018-07-24 12:16:07,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:16:07,198 INFO L471 AbstractCegarLoop]: Abstraction has 37176 states and 41042 transitions. [2018-07-24 12:16:07,198 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:16:07,198 INFO L276 IsEmpty]: Start isEmpty. Operand 37176 states and 41042 transitions. [2018-07-24 12:16:07,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 662 [2018-07-24 12:16:07,219 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:16:07,220 INFO L353 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:16:07,220 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 12:16:07,220 INFO L82 PathProgramCache]: Analyzing trace with hash -915014984, now seen corresponding path program 1 times [2018-07-24 12:16:07,221 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:16:07,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:07,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:16:07,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:07,222 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:16:07,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:16:09,582 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 113 proven. 491 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2018-07-24 12:16:09,582 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:16:09,582 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:16:09,589 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:16:09,590 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:16:09,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:16:09,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:16:10,713 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 474 proven. 2 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2018-07-24 12:16:10,713 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:16:11,665 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 273 proven. 78 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2018-07-24 12:16:11,686 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:16:11,686 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:16:11,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:16:11,705 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:16:12,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:16:12,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-07-24 12:16:19,151 WARN L177 SmtUtils]: Removed 3 from assertion stack [2018-07-24 12:16:19,151 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-07-24 12:16:19,353 WARN L512 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:16:19,353 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 12:16:19,359 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 12:16:19,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 12:16:19 BoogieIcfgContainer [2018-07-24 12:16:19,359 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 12:16:19,360 INFO L168 Benchmark]: Toolchain (without parser) took 242865.57 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 3.3 GB in the end (delta: -1.9 GB). Peak memory consumption was 601.2 MB. Max. memory is 7.1 GB. [2018-07-24 12:16:19,361 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 12:16:19,361 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1332.17 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: 126.8 MB). Peak memory consumption was 126.8 MB. Max. memory is 7.1 GB. [2018-07-24 12:16:19,362 INFO L168 Benchmark]: Boogie Procedure Inliner took 297.16 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: 42.7 MB). Peak memory consumption was 42.7 MB. Max. memory is 7.1 GB. [2018-07-24 12:16:19,363 INFO L168 Benchmark]: Boogie Preprocessor took 637.41 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 890.2 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 89.7 MB. Max. memory is 7.1 GB. [2018-07-24 12:16:19,364 INFO L168 Benchmark]: RCFGBuilder took 7823.50 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 325.7 MB). Peak memory consumption was 325.7 MB. Max. memory is 7.1 GB. [2018-07-24 12:16:19,364 INFO L168 Benchmark]: TraceAbstraction took 232769.70 ms. Allocated memory was 2.4 GB in the beginning and 4.1 GB in the end (delta: 1.6 GB). Free memory was 2.0 GB in the beginning and 3.3 GB in the end (delta: -1.4 GB). Peak memory consumption was 268.3 MB. Max. memory is 7.1 GB. [2018-07-24 12:16:19,369 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1332.17 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: 126.8 MB). Peak memory consumption was 126.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 297.16 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: 42.7 MB). Peak memory consumption was 42.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 637.41 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 890.2 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 89.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 7823.50 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 325.7 MB). Peak memory consumption was 325.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 232769.70 ms. Allocated memory was 2.4 GB in the beginning and 4.1 GB in the end (delta: 1.6 GB). Free memory was 2.0 GB in the beginning and 3.3 GB in the end (delta: -1.4 GB). Peak memory consumption was 268.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 82). Cancelled while BasicCegarLoop was analyzing trace of length 662 with TraceHistMax 5, while TraceCheckSpWp was constructing forward predicates, while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 57. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 438 locations, 1 error locations. TIMEOUT Result, 232.6s OverallTime, 14 OverallIterations, 5 TraceHistogramMax, 183.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3829 SDtfs, 29946 SDslu, 3957 SDs, 0 SdLazy, 47182 SolverSat, 10185 SolverUnsat, 17 SolverUnknown, 0 SolverNotchecked, 161.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9078 GetRequests, 8813 SyntacticMatches, 39 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2517 ImplicationChecksByTransitivity, 20.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37176occurred 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: 5.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 5427 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 2.7s SatisfiabilityAnalysisTime, 26.0s InterpolantComputationTime, 8021 NumberOfCodeBlocks, 8021 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 12369 ConstructedInterpolants, 30 QuantifiedInterpolants, 21139050 SizeOfPredicates, 37 NumberOfNonLiveVariables, 6935 ConjunctsInSsa, 152 ConjunctsInUnsatCore, 37 InterpolantComputations, 10 PerfectInterpolantSequences, 7799/9958 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/Problem15_label41_false-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_12-16-19-381.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem15_label41_false-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_12-16-19-381.csv Completed graceful shutdown