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_label26_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 14:34:59,518 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 14:34:59,521 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 14:34:59,535 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 14:34:59,535 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 14:34:59,536 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 14:34:59,537 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 14:34:59,539 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 14:34:59,541 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 14:34:59,542 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 14:34:59,543 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 14:34:59,543 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 14:34:59,544 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 14:34:59,545 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 14:34:59,546 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 14:34:59,547 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 14:34:59,548 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 14:34:59,550 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 14:34:59,552 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 14:34:59,553 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 14:34:59,554 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 14:34:59,556 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 14:34:59,558 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 14:34:59,558 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 14:34:59,559 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 14:34:59,560 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 14:34:59,561 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 14:34:59,561 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 14:34:59,562 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 14:34:59,563 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 14:34:59,564 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 14:34:59,565 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 14:34:59,565 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 14:34:59,565 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 14:34:59,566 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 14:34:59,567 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 14:34:59,567 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 14:34:59,585 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 14:34:59,586 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 14:34:59,587 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 14:34:59,587 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 14:34:59,587 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 14:34:59,587 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 14:34:59,587 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 14:34:59,588 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 14:34:59,588 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 14:34:59,588 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 14:34:59,588 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 14:34:59,589 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 14:34:59,589 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 14:34:59,589 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 14:34:59,590 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 14:34:59,590 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 14:34:59,590 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 14:34:59,590 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 14:34:59,590 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 14:34:59,591 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 14:34:59,591 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 14:34:59,591 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 14:34:59,591 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 14:34:59,591 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 14:34:59,592 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 14:34:59,592 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 14:34:59,592 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 14:34:59,592 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 14:34:59,593 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 14:34:59,593 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 14:34:59,593 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 14:34:59,593 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 14:34:59,593 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 14:34:59,649 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 14:34:59,668 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 14:34:59,674 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 14:34:59,676 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 14:34:59,676 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 14:34:59,677 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label26_true-unreach-call.c [2018-07-24 14:35:00,035 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79d81d9ee/1f0772049ec24c2ebff5fac4cef3883f/FLAG4a71e9f72 [2018-07-24 14:35:00,445 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 14:35:00,445 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label26_true-unreach-call.c [2018-07-24 14:35:00,468 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79d81d9ee/1f0772049ec24c2ebff5fac4cef3883f/FLAG4a71e9f72 [2018-07-24 14:35:00,483 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79d81d9ee/1f0772049ec24c2ebff5fac4cef3883f [2018-07-24 14:35:00,494 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 14:35:00,496 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 14:35:00,497 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 14:35:00,498 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 14:35:00,504 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 14:35:00,506 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 02:35:00" (1/1) ... [2018-07-24 14:35:00,509 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72a77100 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:35:00, skipping insertion in model container [2018-07-24 14:35:00,509 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 02:35:00" (1/1) ... [2018-07-24 14:35:00,813 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 14:35:01,426 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 14:35:01,443 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 14:35:01,767 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 14:35:01,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:35:01 WrapperNode [2018-07-24 14:35:01,920 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 14:35:01,922 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 14:35:01,922 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 14:35:01,922 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 14:35:01,933 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:35:01" (1/1) ... [2018-07-24 14:35:02,009 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:35:01" (1/1) ... [2018-07-24 14:35:02,168 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 14:35:02,169 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 14:35:02,169 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 14:35:02,169 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 14:35:02,588 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:35:01" (1/1) ... [2018-07-24 14:35:02,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:35:01" (1/1) ... [2018-07-24 14:35:02,604 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:35:01" (1/1) ... [2018-07-24 14:35:02,605 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:35:01" (1/1) ... [2018-07-24 14:35:02,675 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:35:01" (1/1) ... [2018-07-24 14:35:02,700 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:35:01" (1/1) ... [2018-07-24 14:35:02,727 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:35:01" (1/1) ... [2018-07-24 14:35:02,766 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 14:35:02,767 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 14:35:02,767 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 14:35:02,767 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 14:35:02,768 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:35:01" (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 14:35:02,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 14:35:02,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 14:35:02,841 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-07-24 14:35:02,841 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-07-24 14:35:02,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 14:35:02,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 14:35:02,841 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 14:35:02,842 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 14:35:02,842 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output2 [2018-07-24 14:35:02,842 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output2 [2018-07-24 14:35:11,492 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 14:35:11,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 02:35:11 BoogieIcfgContainer [2018-07-24 14:35:11,493 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 14:35:11,498 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 14:35:11,499 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 14:35:11,502 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 14:35:11,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 02:35:00" (1/3) ... [2018-07-24 14:35:11,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@237f32d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 02:35:11, skipping insertion in model container [2018-07-24 14:35:11,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:35:01" (2/3) ... [2018-07-24 14:35:11,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@237f32d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 02:35:11, skipping insertion in model container [2018-07-24 14:35:11,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 02:35:11" (3/3) ... [2018-07-24 14:35:11,508 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label26_true-unreach-call.c [2018-07-24 14:35:11,520 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 14:35:11,536 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 14:35:11,611 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 14:35:11,612 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 14:35:11,612 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 14:35:11,613 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 14:35:11,613 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 14:35:11,613 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 14:35:11,613 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 14:35:11,613 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 14:35:11,613 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 14:35:11,660 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states. [2018-07-24 14:35:11,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-07-24 14:35:11,677 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:35:11,678 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:35:11,679 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:35:11,683 INFO L82 PathProgramCache]: Analyzing trace with hash -155037732, now seen corresponding path program 1 times [2018-07-24 14:35:11,686 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:35:11,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:35:11,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:35:11,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:35:11,733 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:35:11,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:35:12,186 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 14:35:12,188 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:35:12,188 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 14:35:12,189 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:35:12,194 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 14:35:12,210 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 14:35:12,210 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:35:12,213 INFO L87 Difference]: Start difference. First operand 438 states. Second operand 4 states. [2018-07-24 14:35:21,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:35:21,992 INFO L93 Difference]: Finished difference Result 1558 states and 2849 transitions. [2018-07-24 14:35:21,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 14:35:21,994 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2018-07-24 14:35:21,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:35:22,022 INFO L225 Difference]: With dead ends: 1558 [2018-07-24 14:35:22,022 INFO L226 Difference]: Without dead ends: 1114 [2018-07-24 14:35:22,033 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 14:35:22,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2018-07-24 14:35:22,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1091. [2018-07-24 14:35:22,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1091 states. [2018-07-24 14:35:22,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 1853 transitions. [2018-07-24 14:35:22,186 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 1853 transitions. Word has length 60 [2018-07-24 14:35:22,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:35:22,187 INFO L471 AbstractCegarLoop]: Abstraction has 1091 states and 1853 transitions. [2018-07-24 14:35:22,188 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 14:35:22,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 1853 transitions. [2018-07-24 14:35:22,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-07-24 14:35:22,211 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:35:22,211 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:35:22,212 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:35:22,212 INFO L82 PathProgramCache]: Analyzing trace with hash -286490358, now seen corresponding path program 1 times [2018-07-24 14:35:22,212 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:35:22,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:35:22,215 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:35:22,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:35:22,216 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:35:22,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:35:22,531 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:35:22,531 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:35:22,531 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-07-24 14:35:22,532 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:35:22,534 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 14:35:22,534 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 14:35:22,534 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-07-24 14:35:22,535 INFO L87 Difference]: Start difference. First operand 1091 states and 1853 transitions. Second operand 5 states. [2018-07-24 14:35:38,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:35:38,038 INFO L93 Difference]: Finished difference Result 4063 states and 7149 transitions. [2018-07-24 14:35:38,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 14:35:38,039 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 133 [2018-07-24 14:35:38,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:35:38,065 INFO L225 Difference]: With dead ends: 4063 [2018-07-24 14:35:38,065 INFO L226 Difference]: Without dead ends: 2978 [2018-07-24 14:35:38,080 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-07-24 14:35:38,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2978 states. [2018-07-24 14:35:38,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2978 to 2940. [2018-07-24 14:35:38,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2940 states. [2018-07-24 14:35:38,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2940 states to 2940 states and 4059 transitions. [2018-07-24 14:35:38,213 INFO L78 Accepts]: Start accepts. Automaton has 2940 states and 4059 transitions. Word has length 133 [2018-07-24 14:35:38,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:35:38,214 INFO L471 AbstractCegarLoop]: Abstraction has 2940 states and 4059 transitions. [2018-07-24 14:35:38,214 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 14:35:38,214 INFO L276 IsEmpty]: Start isEmpty. Operand 2940 states and 4059 transitions. [2018-07-24 14:35:38,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-07-24 14:35:38,220 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:35:38,220 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:35:38,221 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:35:38,221 INFO L82 PathProgramCache]: Analyzing trace with hash -732739078, now seen corresponding path program 1 times [2018-07-24 14:35:38,221 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:35:38,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:35:38,226 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:35:38,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:35:38,226 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:35:38,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:35:38,424 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:35:38,424 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:35:38,425 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 14:35:38,425 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:35:38,426 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 14:35:38,426 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 14:35:38,426 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:35:38,426 INFO L87 Difference]: Start difference. First operand 2940 states and 4059 transitions. Second operand 4 states. [2018-07-24 14:35:44,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:35:44,288 INFO L93 Difference]: Finished difference Result 10889 states and 15486 transitions. [2018-07-24 14:35:44,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 14:35:44,290 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 141 [2018-07-24 14:35:44,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:35:44,339 INFO L225 Difference]: With dead ends: 10889 [2018-07-24 14:35:44,339 INFO L226 Difference]: Without dead ends: 7955 [2018-07-24 14:35:44,367 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 14:35:44,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7955 states. [2018-07-24 14:35:44,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7955 to 7334. [2018-07-24 14:35:44,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7334 states. [2018-07-24 14:35:44,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7334 states to 7334 states and 9685 transitions. [2018-07-24 14:35:44,578 INFO L78 Accepts]: Start accepts. Automaton has 7334 states and 9685 transitions. Word has length 141 [2018-07-24 14:35:44,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:35:44,579 INFO L471 AbstractCegarLoop]: Abstraction has 7334 states and 9685 transitions. [2018-07-24 14:35:44,579 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 14:35:44,579 INFO L276 IsEmpty]: Start isEmpty. Operand 7334 states and 9685 transitions. [2018-07-24 14:35:44,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-07-24 14:35:44,587 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:35:44,588 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:35:44,588 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:35:44,588 INFO L82 PathProgramCache]: Analyzing trace with hash 2141240502, now seen corresponding path program 1 times [2018-07-24 14:35:44,588 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:35:44,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:35:44,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:35:44,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:35:44,594 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:35:44,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:35:44,931 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:35:44,931 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:35:44,931 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 14:35:44,931 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:35:44,932 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 14:35:44,932 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 14:35:44,933 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 14:35:44,933 INFO L87 Difference]: Start difference. First operand 7334 states and 9685 transitions. Second operand 6 states. [2018-07-24 14:35:51,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:35:51,902 INFO L93 Difference]: Finished difference Result 15948 states and 21378 transitions. [2018-07-24 14:35:51,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 14:35:51,902 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 160 [2018-07-24 14:35:51,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:35:51,947 INFO L225 Difference]: With dead ends: 15948 [2018-07-24 14:35:51,947 INFO L226 Difference]: Without dead ends: 8620 [2018-07-24 14:35:51,985 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 14:35:51,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8620 states. [2018-07-24 14:35:52,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8620 to 7960. [2018-07-24 14:35:52,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7960 states. [2018-07-24 14:35:52,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7960 states to 7960 states and 10318 transitions. [2018-07-24 14:35:52,184 INFO L78 Accepts]: Start accepts. Automaton has 7960 states and 10318 transitions. Word has length 160 [2018-07-24 14:35:52,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:35:52,185 INFO L471 AbstractCegarLoop]: Abstraction has 7960 states and 10318 transitions. [2018-07-24 14:35:52,185 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 14:35:52,185 INFO L276 IsEmpty]: Start isEmpty. Operand 7960 states and 10318 transitions. [2018-07-24 14:35:52,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2018-07-24 14:35:52,197 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:35:52,197 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 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 14:35:52,198 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:35:52,198 INFO L82 PathProgramCache]: Analyzing trace with hash -868249644, now seen corresponding path program 1 times [2018-07-24 14:35:52,198 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:35:52,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:35:52,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:35:52,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:35:52,199 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:35:52,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:35:52,698 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2018-07-24 14:35:52,699 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:35:52,699 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 14:35:52,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:35:52,719 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:35:52,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:35:52,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:35:54,041 WARN L169 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2018-07-24 14:35:54,134 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-07-24 14:35:54,134 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:35:55,407 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 106 proven. 76 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:35:55,438 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:35:55,438 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 12 [2018-07-24 14:35:55,438 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:35:55,439 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 14:35:55,439 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 14:35:55,439 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2018-07-24 14:35:55,440 INFO L87 Difference]: Start difference. First operand 7960 states and 10318 transitions. Second operand 5 states. [2018-07-24 14:36:06,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:36:06,745 INFO L93 Difference]: Finished difference Result 18962 states and 24757 transitions. [2018-07-24 14:36:06,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 14:36:06,746 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2018-07-24 14:36:06,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:36:06,810 INFO L225 Difference]: With dead ends: 18962 [2018-07-24 14:36:06,810 INFO L226 Difference]: Without dead ends: 11008 [2018-07-24 14:36:06,853 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 479 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2018-07-24 14:36:06,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11008 states. [2018-07-24 14:36:07,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11008 to 10915. [2018-07-24 14:36:07,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10915 states. [2018-07-24 14:36:07,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10915 states to 10915 states and 13999 transitions. [2018-07-24 14:36:07,139 INFO L78 Accepts]: Start accepts. Automaton has 10915 states and 13999 transitions. Word has length 241 [2018-07-24 14:36:07,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:36:07,139 INFO L471 AbstractCegarLoop]: Abstraction has 10915 states and 13999 transitions. [2018-07-24 14:36:07,139 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 14:36:07,139 INFO L276 IsEmpty]: Start isEmpty. Operand 10915 states and 13999 transitions. [2018-07-24 14:36:07,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-07-24 14:36:07,157 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:36:07,158 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:36:07,158 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:36:07,158 INFO L82 PathProgramCache]: Analyzing trace with hash -2024019486, now seen corresponding path program 1 times [2018-07-24 14:36:07,158 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:36:07,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:36:07,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:36:07,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:36:07,160 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:36:07,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:36:07,877 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 109 proven. 87 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-07-24 14:36:07,877 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:36:07,877 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 14:36:07,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:36:07,885 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:36:07,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:36:07,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:36:08,273 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-07-24 14:36:08,274 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:36:08,673 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-07-24 14:36:08,695 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 14:36:08,695 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6] total 11 [2018-07-24 14:36:08,695 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:36:08,696 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 14:36:08,696 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 14:36:08,696 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2018-07-24 14:36:08,696 INFO L87 Difference]: Start difference. First operand 10915 states and 13999 transitions. Second operand 5 states. [2018-07-24 14:36:14,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:36:14,473 INFO L93 Difference]: Finished difference Result 31742 states and 41754 transitions. [2018-07-24 14:36:14,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 14:36:14,474 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 291 [2018-07-24 14:36:14,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:36:14,555 INFO L225 Difference]: With dead ends: 31742 [2018-07-24 14:36:14,555 INFO L226 Difference]: Without dead ends: 21141 [2018-07-24 14:36:14,586 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 579 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2018-07-24 14:36:14,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21141 states. [2018-07-24 14:36:14,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21141 to 20076. [2018-07-24 14:36:14,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20076 states. [2018-07-24 14:36:15,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20076 states to 20076 states and 24294 transitions. [2018-07-24 14:36:15,039 INFO L78 Accepts]: Start accepts. Automaton has 20076 states and 24294 transitions. Word has length 291 [2018-07-24 14:36:15,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:36:15,040 INFO L471 AbstractCegarLoop]: Abstraction has 20076 states and 24294 transitions. [2018-07-24 14:36:15,040 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 14:36:15,040 INFO L276 IsEmpty]: Start isEmpty. Operand 20076 states and 24294 transitions. [2018-07-24 14:36:15,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2018-07-24 14:36:15,069 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:36:15,069 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:36:15,069 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:36:15,070 INFO L82 PathProgramCache]: Analyzing trace with hash -353965621, now seen corresponding path program 1 times [2018-07-24 14:36:15,070 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:36:15,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:36:15,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:36:15,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:36:15,071 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:36:15,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:36:16,119 WARN L169 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-07-24 14:36:16,574 WARN L169 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2018-07-24 14:36:16,892 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 243 proven. 169 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:36:16,892 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:36:16,893 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 14:36:16,900 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:36:16,900 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:36:17,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:36:17,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:36:17,188 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 337 proven. 26 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-07-24 14:36:17,188 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:36:18,031 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 169 proven. 243 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:36:18,070 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:36:18,070 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:36:18,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:36:18,099 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:36:18,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:36:18,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:36:18,961 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 287 proven. 26 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2018-07-24 14:36:18,961 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:36:19,656 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 169 proven. 243 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:36:19,658 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:36:19,659 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9, 8, 9] total 24 [2018-07-24 14:36:19,659 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:36:19,660 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-24 14:36:19,661 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-24 14:36:19,661 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2018-07-24 14:36:19,661 INFO L87 Difference]: Start difference. First operand 20076 states and 24294 transitions. Second operand 14 states. [2018-07-24 14:36:48,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:36:48,211 INFO L93 Difference]: Finished difference Result 49840 states and 62351 transitions. [2018-07-24 14:36:48,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-07-24 14:36:48,213 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 337 [2018-07-24 14:36:48,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:36:48,332 INFO L225 Difference]: With dead ends: 49840 [2018-07-24 14:36:48,332 INFO L226 Difference]: Without dead ends: 29191 [2018-07-24 14:36:48,387 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1408 GetRequests, 1359 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=543, Invalid=1809, Unknown=0, NotChecked=0, Total=2352 [2018-07-24 14:36:48,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29191 states. [2018-07-24 14:36:49,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29191 to 27301. [2018-07-24 14:36:49,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27301 states. [2018-07-24 14:36:49,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27301 states to 27301 states and 33734 transitions. [2018-07-24 14:36:49,082 INFO L78 Accepts]: Start accepts. Automaton has 27301 states and 33734 transitions. Word has length 337 [2018-07-24 14:36:49,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:36:49,083 INFO L471 AbstractCegarLoop]: Abstraction has 27301 states and 33734 transitions. [2018-07-24 14:36:49,083 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-24 14:36:49,083 INFO L276 IsEmpty]: Start isEmpty. Operand 27301 states and 33734 transitions. [2018-07-24 14:36:49,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2018-07-24 14:36:49,111 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:36:49,111 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-07-24 14:36:49,111 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:36:49,112 INFO L82 PathProgramCache]: Analyzing trace with hash 2132207382, now seen corresponding path program 1 times [2018-07-24 14:36:49,112 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:36:49,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:36:49,113 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:36:49,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:36:49,113 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:36:49,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:36:50,211 WARN L169 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-07-24 14:36:50,625 WARN L169 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2018-07-24 14:36:50,919 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 243 proven. 173 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:36:50,919 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:36:50,919 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:36:50,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:36:50,927 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:36:51,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:36:51,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:36:51,484 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 341 proven. 26 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-07-24 14:36:51,484 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:36:52,019 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 169 proven. 247 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:36:52,040 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:36:52,040 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:36:52,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:36:52,057 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:36:52,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:36:52,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:36:53,505 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 291 proven. 26 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2018-07-24 14:36:53,505 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:36:54,102 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 169 proven. 247 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:36:54,104 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:36:54,105 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9, 8, 9] total 24 [2018-07-24 14:36:54,105 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:36:54,106 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-24 14:36:54,106 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-24 14:36:54,107 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2018-07-24 14:36:54,107 INFO L87 Difference]: Start difference. First operand 27301 states and 33734 transitions. Second operand 14 states. [2018-07-24 14:37:28,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:37:28,207 INFO L93 Difference]: Finished difference Result 61511 states and 76431 transitions. [2018-07-24 14:37:28,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-07-24 14:37:28,208 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 422 [2018-07-24 14:37:28,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:37:28,323 INFO L225 Difference]: With dead ends: 61511 [2018-07-24 14:37:28,324 INFO L226 Difference]: Without dead ends: 33631 [2018-07-24 14:37:28,384 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1748 GetRequests, 1696 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=540, Invalid=1812, Unknown=0, NotChecked=0, Total=2352 [2018-07-24 14:37:28,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33631 states. [2018-07-24 14:37:28,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33631 to 29386. [2018-07-24 14:37:28,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29386 states. [2018-07-24 14:37:28,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29386 states to 29386 states and 36213 transitions. [2018-07-24 14:37:28,906 INFO L78 Accepts]: Start accepts. Automaton has 29386 states and 36213 transitions. Word has length 422 [2018-07-24 14:37:28,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:37:28,906 INFO L471 AbstractCegarLoop]: Abstraction has 29386 states and 36213 transitions. [2018-07-24 14:37:28,907 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-24 14:37:28,907 INFO L276 IsEmpty]: Start isEmpty. Operand 29386 states and 36213 transitions. [2018-07-24 14:37:28,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2018-07-24 14:37:28,926 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:37:28,927 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:37:28,927 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:37:28,927 INFO L82 PathProgramCache]: Analyzing trace with hash -2029509234, now seen corresponding path program 1 times [2018-07-24 14:37:28,928 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:37:28,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:37:28,928 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:37:28,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:37:28,929 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:37:28,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:37:29,821 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 190 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:37:29,821 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:37:29,821 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:37:29,829 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:37:29,829 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:37:29,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:37:29,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:37:30,208 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 190 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:37:30,208 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:37:30,397 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 190 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:37:30,419 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:37:30,419 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:37:30,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:37:30,437 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:37:30,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:37:30,781 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:37:30,890 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 190 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:37:30,890 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:37:31,108 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 190 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:37:31,111 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:37:31,111 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-07-24 14:37:31,111 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:37:31,113 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 14:37:31,113 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 14:37:31,113 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-07-24 14:37:31,113 INFO L87 Difference]: Start difference. First operand 29386 states and 36213 transitions. Second operand 9 states. [2018-07-24 14:37:42,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:37:42,604 INFO L93 Difference]: Finished difference Result 73128 states and 98359 transitions. [2018-07-24 14:37:42,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-24 14:37:42,604 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 433 [2018-07-24 14:37:42,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:37:42,805 INFO L225 Difference]: With dead ends: 73128 [2018-07-24 14:37:42,806 INFO L226 Difference]: Without dead ends: 44056 [2018-07-24 14:37:42,953 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1752 GetRequests, 1730 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2018-07-24 14:37:42,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44056 states. [2018-07-24 14:37:43,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44056 to 41437. [2018-07-24 14:37:43,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41437 states. [2018-07-24 14:37:43,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41437 states to 41437 states and 50060 transitions. [2018-07-24 14:37:43,892 INFO L78 Accepts]: Start accepts. Automaton has 41437 states and 50060 transitions. Word has length 433 [2018-07-24 14:37:43,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:37:43,893 INFO L471 AbstractCegarLoop]: Abstraction has 41437 states and 50060 transitions. [2018-07-24 14:37:43,893 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 14:37:43,893 INFO L276 IsEmpty]: Start isEmpty. Operand 41437 states and 50060 transitions. [2018-07-24 14:37:43,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2018-07-24 14:37:43,933 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:37:43,934 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:37:43,934 INFO L414 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:37:43,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1523565630, now seen corresponding path program 1 times [2018-07-24 14:37:43,935 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:37:43,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:37:43,936 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:37:43,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:37:43,936 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:37:44,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:37:44,502 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 332 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-07-24 14:37:44,502 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:37:44,502 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:37:44,510 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:37:44,510 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:37:44,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:37:44,683 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:37:45,091 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 332 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-07-24 14:37:45,092 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:37:45,317 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 332 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-07-24 14:37:45,338 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:37:45,338 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:37:45,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:37:45,354 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:37:45,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:37:45,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:37:45,846 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 332 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-07-24 14:37:45,847 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:37:46,053 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 332 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-07-24 14:37:46,055 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:37:46,055 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-07-24 14:37:46,055 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:37:46,057 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 14:37:46,057 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 14:37:46,057 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-07-24 14:37:46,058 INFO L87 Difference]: Start difference. First operand 41437 states and 50060 transitions. Second operand 9 states. [2018-07-24 14:37:54,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:37:54,475 INFO L93 Difference]: Finished difference Result 81581 states and 98955 transitions. [2018-07-24 14:37:54,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-24 14:37:54,475 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 496 [2018-07-24 14:37:54,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:37:54,581 INFO L225 Difference]: With dead ends: 81581 [2018-07-24 14:37:54,581 INFO L226 Difference]: Without dead ends: 40458 [2018-07-24 14:37:54,681 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2006 GetRequests, 1984 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2018-07-24 14:37:54,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40458 states. [2018-07-24 14:37:55,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40458 to 39361. [2018-07-24 14:37:55,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39361 states. [2018-07-24 14:37:55,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39361 states to 39361 states and 44435 transitions. [2018-07-24 14:37:55,302 INFO L78 Accepts]: Start accepts. Automaton has 39361 states and 44435 transitions. Word has length 496 [2018-07-24 14:37:55,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:37:55,303 INFO L471 AbstractCegarLoop]: Abstraction has 39361 states and 44435 transitions. [2018-07-24 14:37:55,303 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 14:37:55,303 INFO L276 IsEmpty]: Start isEmpty. Operand 39361 states and 44435 transitions. [2018-07-24 14:37:55,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 586 [2018-07-24 14:37:55,369 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:37:55,370 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 14:37:55,370 INFO L414 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:37:55,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1189809454, now seen corresponding path program 1 times [2018-07-24 14:37:55,370 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:37:55,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:37:55,371 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:37:55,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:37:55,372 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:37:55,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:37:56,006 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2018-07-24 14:37:56,006 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:37:56,007 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 14:37:56,007 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:37:56,008 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 14:37:56,008 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 14:37:56,009 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:37:56,009 INFO L87 Difference]: Start difference. First operand 39361 states and 44435 transitions. Second operand 4 states. [2018-07-24 14:38:00,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:38:00,920 INFO L93 Difference]: Finished difference Result 101176 states and 119922 transitions. [2018-07-24 14:38:00,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 14:38:00,933 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 585 [2018-07-24 14:38:00,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:38:01,117 INFO L225 Difference]: With dead ends: 101176 [2018-07-24 14:38:01,117 INFO L226 Difference]: Without dead ends: 61820 [2018-07-24 14:38:01,255 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 14:38:01,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61820 states. [2018-07-24 14:38:02,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61820 to 61326. [2018-07-24 14:38:02,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61326 states. [2018-07-24 14:38:02,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61326 states to 61326 states and 69265 transitions. [2018-07-24 14:38:02,567 INFO L78 Accepts]: Start accepts. Automaton has 61326 states and 69265 transitions. Word has length 585 [2018-07-24 14:38:02,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:38:02,568 INFO L471 AbstractCegarLoop]: Abstraction has 61326 states and 69265 transitions. [2018-07-24 14:38:02,568 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 14:38:02,568 INFO L276 IsEmpty]: Start isEmpty. Operand 61326 states and 69265 transitions. [2018-07-24 14:38:02,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 593 [2018-07-24 14:38:02,607 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:38:02,608 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:38:02,608 INFO L414 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:38:02,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1064293972, now seen corresponding path program 1 times [2018-07-24 14:38:02,608 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:38:02,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:38:02,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:38:02,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:38:02,610 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:38:02,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:38:03,707 WARN L169 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2018-07-24 14:38:04,252 WARN L169 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2018-07-24 14:38:04,889 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 356 proven. 99 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-07-24 14:38:04,890 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:38:04,890 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:38:04,900 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:38:04,900 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:38:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:38:05,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:38:05,366 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 497 proven. 2 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-07-24 14:38:05,367 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:38:06,249 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 356 proven. 99 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-07-24 14:38:06,270 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:38:06,270 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:38:06,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:38:06,286 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:38:06,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:38:06,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:38:07,132 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 306 proven. 2 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2018-07-24 14:38:07,132 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:38:08,205 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 167 proven. 190 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2018-07-24 14:38:08,207 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:38:08,208 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5, 5, 5] total 18 [2018-07-24 14:38:08,208 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:38:08,209 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-24 14:38:08,210 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-24 14:38:08,210 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2018-07-24 14:38:08,210 INFO L87 Difference]: Start difference. First operand 61326 states and 69265 transitions. Second operand 14 states. [2018-07-24 14:38:19,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:38:19,016 INFO L93 Difference]: Finished difference Result 127618 states and 144843 transitions. [2018-07-24 14:38:19,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-07-24 14:38:19,018 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 592 [2018-07-24 14:38:19,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:38:19,156 INFO L225 Difference]: With dead ends: 127618 [2018-07-24 14:38:19,156 INFO L226 Difference]: Without dead ends: 66606 [2018-07-24 14:38:19,246 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2412 GetRequests, 2373 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=367, Invalid=965, Unknown=0, NotChecked=0, Total=1332 [2018-07-24 14:38:19,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66606 states. [2018-07-24 14:38:20,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66606 to 63966. [2018-07-24 14:38:20,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63966 states. [2018-07-24 14:38:20,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63966 states to 63966 states and 71989 transitions. [2018-07-24 14:38:20,187 INFO L78 Accepts]: Start accepts. Automaton has 63966 states and 71989 transitions. Word has length 592 [2018-07-24 14:38:20,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:38:20,188 INFO L471 AbstractCegarLoop]: Abstraction has 63966 states and 71989 transitions. [2018-07-24 14:38:20,188 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-24 14:38:20,188 INFO L276 IsEmpty]: Start isEmpty. Operand 63966 states and 71989 transitions. [2018-07-24 14:38:20,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 630 [2018-07-24 14:38:20,230 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:38:20,231 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:38:20,231 INFO L414 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:38:20,232 INFO L82 PathProgramCache]: Analyzing trace with hash 848390238, now seen corresponding path program 1 times [2018-07-24 14:38:20,232 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:38:20,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:38:20,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:38:20,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:38:20,235 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:38:20,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:38:20,988 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2018-07-24 14:38:20,988 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:38:20,988 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) [2018-07-24 14:38:21,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:38:21,000 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:38:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:38:21,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:38:21,846 WARN L169 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 23 [2018-07-24 14:38:22,961 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2018-07-24 14:38:22,962 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:38:23,329 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2018-07-24 14:38:23,350 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 14:38:23,350 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 9 [2018-07-24 14:38:23,350 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:38:23,351 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 14:38:23,351 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 14:38:23,354 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-07-24 14:38:23,355 INFO L87 Difference]: Start difference. First operand 63966 states and 71989 transitions. Second operand 3 states. [2018-07-24 14:38:31,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:38:31,802 INFO L93 Difference]: Finished difference Result 135294 states and 155146 transitions. [2018-07-24 14:38:31,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 14:38:31,803 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 629 [2018-07-24 14:38:31,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:38:31,955 INFO L225 Difference]: With dead ends: 135294 [2018-07-24 14:38:31,955 INFO L226 Difference]: Without dead ends: 71642 [2018-07-24 14:38:32,061 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1270 GetRequests, 1262 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-07-24 14:38:32,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71642 states. [2018-07-24 14:38:32,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71642 to 70958. [2018-07-24 14:38:32,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70958 states. [2018-07-24 14:38:32,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70958 states to 70958 states and 80564 transitions. [2018-07-24 14:38:32,980 INFO L78 Accepts]: Start accepts. Automaton has 70958 states and 80564 transitions. Word has length 629 [2018-07-24 14:38:32,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:38:32,981 INFO L471 AbstractCegarLoop]: Abstraction has 70958 states and 80564 transitions. [2018-07-24 14:38:32,981 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 14:38:32,982 INFO L276 IsEmpty]: Start isEmpty. Operand 70958 states and 80564 transitions. [2018-07-24 14:38:33,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 734 [2018-07-24 14:38:33,027 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:38:33,028 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:38:33,028 INFO L414 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:38:33,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1611260831, now seen corresponding path program 1 times [2018-07-24 14:38:33,029 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:38:33,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:38:33,029 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:38:33,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:38:33,030 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:38:33,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:38:34,286 WARN L169 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 5 [2018-07-24 14:38:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2018-07-24 14:38:34,527 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:38:34,527 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-07-24 14:38:34,527 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:38:34,528 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 14:38:34,528 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 14:38:34,528 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-07-24 14:38:34,528 INFO L87 Difference]: Start difference. First operand 70958 states and 80564 transitions. Second operand 5 states. [2018-07-24 14:38:41,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:38:41,829 INFO L93 Difference]: Finished difference Result 177889 states and 207201 transitions. [2018-07-24 14:38:41,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-24 14:38:41,829 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 733 [2018-07-24 14:38:41,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:38:41,987 INFO L225 Difference]: With dead ends: 177889 [2018-07-24 14:38:41,987 INFO L226 Difference]: Without dead ends: 67978 [2018-07-24 14:38:42,183 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-07-24 14:38:42,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67978 states. [2018-07-24 14:38:43,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67978 to 60803. [2018-07-24 14:38:43,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60803 states. [2018-07-24 14:38:43,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60803 states to 60803 states and 65450 transitions. [2018-07-24 14:38:43,724 INFO L78 Accepts]: Start accepts. Automaton has 60803 states and 65450 transitions. Word has length 733 [2018-07-24 14:38:43,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:38:43,725 INFO L471 AbstractCegarLoop]: Abstraction has 60803 states and 65450 transitions. [2018-07-24 14:38:43,725 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 14:38:43,725 INFO L276 IsEmpty]: Start isEmpty. Operand 60803 states and 65450 transitions. [2018-07-24 14:38:43,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 824 [2018-07-24 14:38:43,761 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:38:43,762 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:38:43,762 INFO L414 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:38:43,763 INFO L82 PathProgramCache]: Analyzing trace with hash -373364505, now seen corresponding path program 1 times [2018-07-24 14:38:43,763 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:38:43,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:38:43,764 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:38:43,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:38:43,764 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:38:43,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:38:44,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1049 backedges. 228 proven. 2 refuted. 0 times theorem prover too weak. 819 trivial. 0 not checked. [2018-07-24 14:38:44,540 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:38:44,541 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:38:44,554 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:38:44,554 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:38:44,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:38:44,855 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:38:45,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1049 backedges. 648 proven. 0 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2018-07-24 14:38:45,197 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:38:46,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1049 backedges. 228 proven. 2 refuted. 0 times theorem prover too weak. 819 trivial. 0 not checked. [2018-07-24 14:38:46,335 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:38:46,336 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 4 [2018-07-24 14:38:46,336 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:38:46,337 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 14:38:46,337 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 14:38:46,337 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:38:46,337 INFO L87 Difference]: Start difference. First operand 60803 states and 65450 transitions. Second operand 3 states. [2018-07-24 14:38:47,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:38:47,846 INFO L93 Difference]: Finished difference Result 120967 states and 130228 transitions. [2018-07-24 14:38:47,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 14:38:47,852 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 823 [2018-07-24 14:38:47,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:38:47,979 INFO L225 Difference]: With dead ends: 120967 [2018-07-24 14:38:47,979 INFO L226 Difference]: Without dead ends: 60478 [2018-07-24 14:38:48,066 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1648 GetRequests, 1646 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 14:38:48,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60478 states. [2018-07-24 14:38:48,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60478 to 60475. [2018-07-24 14:38:48,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60475 states. [2018-07-24 14:38:48,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60475 states to 60475 states and 65044 transitions. [2018-07-24 14:38:48,786 INFO L78 Accepts]: Start accepts. Automaton has 60475 states and 65044 transitions. Word has length 823 [2018-07-24 14:38:48,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:38:48,787 INFO L471 AbstractCegarLoop]: Abstraction has 60475 states and 65044 transitions. [2018-07-24 14:38:48,787 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 14:38:48,787 INFO L276 IsEmpty]: Start isEmpty. Operand 60475 states and 65044 transitions. [2018-07-24 14:38:48,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 836 [2018-07-24 14:38:48,810 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:38:48,811 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:38:48,811 INFO L414 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:38:48,812 INFO L82 PathProgramCache]: Analyzing trace with hash 780733816, now seen corresponding path program 1 times [2018-07-24 14:38:48,812 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:38:48,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:38:48,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:38:48,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:38:48,813 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:38:48,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:38:49,454 WARN L169 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 14:38:51,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 460 proven. 367 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2018-07-24 14:38:51,626 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:38:51,626 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:38:51,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:38:51,635 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:38:51,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:38:51,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:38:52,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 594 proven. 2 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2018-07-24 14:38:52,326 INFO L316 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2018-07-24 14:38:53,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 594 proven. 2 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2018-07-24 14:38:53,413 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:38:53,413 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:38:53,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:38:53,429 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:38:54,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:38:54,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:38:54,070 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-07-24 14:38:54,272 WARN L512 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:38:54,272 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 14:38:54,278 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 14:38:54,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 02:38:54 BoogieIcfgContainer [2018-07-24 14:38:54,279 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 14:38:54,281 INFO L168 Benchmark]: Toolchain (without parser) took 233786.30 ms. Allocated memory was 1.5 GB in the beginning and 3.7 GB in the end (delta: 2.2 GB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -424.4 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2018-07-24 14:38:54,283 INFO L168 Benchmark]: CDTParser took 0.23 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 14:38:54,284 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1423.40 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 14:38:54,284 INFO L168 Benchmark]: Boogie Procedure Inliner took 246.74 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: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-07-24 14:38:54,285 INFO L168 Benchmark]: Boogie Preprocessor took 597.48 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 886.0 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -1.0 GB). Peak memory consumption was 89.6 MB. Max. memory is 7.1 GB. [2018-07-24 14:38:54,288 INFO L168 Benchmark]: RCFGBuilder took 8726.72 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: 315.9 MB). Peak memory consumption was 315.9 MB. Max. memory is 7.1 GB. [2018-07-24 14:38:54,289 INFO L168 Benchmark]: TraceAbstraction took 222780.86 ms. Allocated memory was 2.4 GB in the beginning and 3.7 GB in the end (delta: 1.3 GB). Free memory was 2.0 GB in the beginning and 1.8 GB in the end (delta: 137.6 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. [2018-07-24 14:38:54,301 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 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 1423.40 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 246.74 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: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 597.48 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 886.0 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -1.0 GB). Peak memory consumption was 89.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 8726.72 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: 315.9 MB). Peak memory consumption was 315.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 222780.86 ms. Allocated memory was 2.4 GB in the beginning and 3.7 GB in the end (delta: 1.3 GB). Free memory was 2.0 GB in the beginning and 1.8 GB in the end (delta: 137.6 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 166]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 166). Cancelled while BasicCegarLoop was analyzing trace of length 836 with TraceHistMax 5, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 1 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 438 locations, 1 error locations. TIMEOUT Result, 222.6s OverallTime, 16 OverallIterations, 5 TraceHistogramMax, 173.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3760 SDtfs, 34284 SDslu, 4109 SDs, 0 SdLazy, 50426 SolverSat, 11726 SolverUnsat, 9 SolverUnknown, 0 SolverNotchecked, 148.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13368 GetRequests, 13126 SyntacticMatches, 22 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1799 ImplicationChecksByTransitivity, 14.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70958occurred 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: 9.6s AutomataMinimizationTime, 15 MinimizatonAttempts, 23347 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 3.8s SatisfiabilityAnalysisTime, 25.8s InterpolantComputationTime, 12620 NumberOfCodeBlocks, 12620 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 19121 ConstructedInterpolants, 58 QuantifiedInterpolants, 33630495 SizeOfPredicates, 36 NumberOfNonLiveVariables, 9515 ConjunctsInSsa, 157 ConjunctsInUnsatCore, 43 InterpolantComputations, 12 PerfectInterpolantSequences, 15092/17264 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_label26_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_14-38-54-323.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem15_label26_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_14-38-54-323.csv Completed graceful shutdown