java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label07_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-10 10:23:44,376 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-10 10:23:44,378 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-10 10:23:44,390 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-10 10:23:44,390 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-10 10:23:44,391 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-10 10:23:44,392 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-10 10:23:44,394 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-10 10:23:44,396 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-10 10:23:44,397 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-10 10:23:44,398 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-10 10:23:44,398 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-10 10:23:44,399 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-10 10:23:44,400 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-10 10:23:44,401 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-10 10:23:44,402 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-10 10:23:44,402 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-10 10:23:44,404 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-10 10:23:44,406 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-10 10:23:44,408 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-10 10:23:44,409 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-10 10:23:44,410 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-10 10:23:44,413 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-10 10:23:44,413 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-10 10:23:44,414 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-10 10:23:44,415 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-10 10:23:44,416 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-10 10:23:44,417 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-10 10:23:44,417 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-10 10:23:44,421 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-10 10:23:44,421 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-10 10:23:44,422 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-10 10:23:44,422 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-10 10:23:44,422 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-10 10:23:44,423 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-10 10:23:44,424 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-10 10:23:44,424 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-10 10:23:44,461 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-10 10:23:44,462 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-10 10:23:44,464 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-10 10:23:44,465 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-10 10:23:44,465 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-10 10:23:44,465 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-10 10:23:44,465 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-10 10:23:44,466 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-10 10:23:44,466 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-10 10:23:44,466 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-10 10:23:44,466 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-10 10:23:44,467 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-10 10:23:44,467 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-10 10:23:44,468 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-10 10:23:44,468 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-10 10:23:44,469 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-10 10:23:44,469 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-10 10:23:44,469 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-10 10:23:44,469 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-10 10:23:44,470 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-10 10:23:44,470 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-10 10:23:44,470 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-10 10:23:44,470 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-10 10:23:44,472 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 10:23:44,472 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-10 10:23:44,472 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-10 10:23:44,473 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-10 10:23:44,473 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-10 10:23:44,473 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-10 10:23:44,473 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-10 10:23:44,474 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-10 10:23:44,474 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-10 10:23:44,474 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-10 10:23:44,531 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-10 10:23:44,545 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-10 10:23:44,549 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-10 10:23:44,551 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-10 10:23:44,551 INFO L276 PluginConnector]: CDTParser initialized [2018-09-10 10:23:44,552 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label07_true-unreach-call.c [2018-09-10 10:23:44,910 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dde7393ad/c1998af1e1a949f582ffa550ceaa14ef/FLAG595ad47ff [2018-09-10 10:23:45,327 INFO L276 CDTParser]: Found 1 translation units. [2018-09-10 10:23:45,328 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label07_true-unreach-call.c [2018-09-10 10:23:45,355 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dde7393ad/c1998af1e1a949f582ffa550ceaa14ef/FLAG595ad47ff [2018-09-10 10:23:45,377 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dde7393ad/c1998af1e1a949f582ffa550ceaa14ef [2018-09-10 10:23:45,390 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-10 10:23:45,393 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-10 10:23:45,394 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-10 10:23:45,395 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-10 10:23:45,403 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-10 10:23:45,404 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 10:23:45" (1/1) ... [2018-09-10 10:23:45,407 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13303bdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:23:45, skipping insertion in model container [2018-09-10 10:23:45,407 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 10:23:45" (1/1) ... [2018-09-10 10:23:45,637 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-10 10:23:46,127 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 10:23:46,146 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-10 10:23:46,415 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 10:23:46,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:23:46 WrapperNode [2018-09-10 10:23:46,493 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-10 10:23:46,494 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-10 10:23:46,494 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-10 10:23:46,494 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-10 10:23:46,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:23:46" (1/1) ... [2018-09-10 10:23:46,541 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:23:46" (1/1) ... [2018-09-10 10:23:46,653 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-10 10:23:46,654 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-10 10:23:46,654 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-10 10:23:46,654 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-10 10:23:46,894 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:23:46" (1/1) ... [2018-09-10 10:23:46,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:23:46" (1/1) ... [2018-09-10 10:23:46,909 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:23:46" (1/1) ... [2018-09-10 10:23:46,910 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:23:46" (1/1) ... [2018-09-10 10:23:46,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:23:46" (1/1) ... [2018-09-10 10:23:46,985 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:23:46" (1/1) ... [2018-09-10 10:23:47,002 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:23:46" (1/1) ... [2018-09-10 10:23:47,020 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-10 10:23:47,021 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-10 10:23:47,021 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-10 10:23:47,021 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-10 10:23:47,022 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:23:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 10:23:47,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-10 10:23:47,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-10 10:23:47,106 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 [2018-09-10 10:23:47,106 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 [2018-09-10 10:23:47,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-10 10:23:47,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-10 10:23:47,107 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-10 10:23:47,107 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-10 10:23:52,397 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-10 10:23:52,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 10:23:52 BoogieIcfgContainer [2018-09-10 10:23:52,398 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-10 10:23:52,399 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-10 10:23:52,399 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-10 10:23:52,403 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-10 10:23:52,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 10:23:45" (1/3) ... [2018-09-10 10:23:52,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70a82771 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 10:23:52, skipping insertion in model container [2018-09-10 10:23:52,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:23:46" (2/3) ... [2018-09-10 10:23:52,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70a82771 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 10:23:52, skipping insertion in model container [2018-09-10 10:23:52,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 10:23:52" (3/3) ... [2018-09-10 10:23:52,407 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label07_true-unreach-call.c [2018-09-10 10:23:52,418 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-10 10:23:52,427 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-10 10:23:52,486 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-10 10:23:52,487 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-10 10:23:52,487 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-10 10:23:52,488 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-10 10:23:52,488 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-10 10:23:52,488 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-10 10:23:52,488 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-10 10:23:52,488 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-10 10:23:52,489 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-10 10:23:52,519 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-09-10 10:23:52,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-09-10 10:23:52,539 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:23:52,541 INFO L376 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:23:52,542 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:23:52,548 INFO L82 PathProgramCache]: Analyzing trace with hash -98541652, now seen corresponding path program 1 times [2018-09-10 10:23:52,551 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:23:52,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:23:52,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:23:52,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:23:52,613 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:23:52,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:23:53,423 WARN L175 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 4 [2018-09-10 10:23:53,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:23:53,727 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:23:53,727 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-10 10:23:53,727 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:23:53,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-10 10:23:53,751 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-10 10:23:53,752 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 10:23:53,754 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 4 states. [2018-09-10 10:23:57,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:23:57,318 INFO L93 Difference]: Finished difference Result 1054 states and 1900 transitions. [2018-09-10 10:23:57,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-10 10:23:57,321 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 179 [2018-09-10 10:23:57,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:23:57,347 INFO L225 Difference]: With dead ends: 1054 [2018-09-10 10:23:57,348 INFO L226 Difference]: Without dead ends: 736 [2018-09-10 10:23:57,356 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 10:23:57,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2018-09-10 10:23:57,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 526. [2018-09-10 10:23:57,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2018-09-10 10:23:57,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 886 transitions. [2018-09-10 10:23:57,480 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 886 transitions. Word has length 179 [2018-09-10 10:23:57,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:23:57,482 INFO L480 AbstractCegarLoop]: Abstraction has 526 states and 886 transitions. [2018-09-10 10:23:57,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-10 10:23:57,482 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 886 transitions. [2018-09-10 10:23:57,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-09-10 10:23:57,489 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:23:57,489 INFO L376 BasicCegarLoop]: trace histogram [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] [2018-09-10 10:23:57,490 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:23:57,490 INFO L82 PathProgramCache]: Analyzing trace with hash -2053173019, now seen corresponding path program 1 times [2018-09-10 10:23:57,490 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:23:57,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:23:57,492 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:23:57,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:23:57,492 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:23:57,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:23:57,795 WARN L175 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 10:23:57,852 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:23:57,852 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:23:57,852 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-10 10:23:57,852 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:23:57,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 10:23:57,855 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 10:23:57,855 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-10 10:23:57,855 INFO L87 Difference]: Start difference. First operand 526 states and 886 transitions. Second operand 6 states. [2018-09-10 10:24:00,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:24:00,844 INFO L93 Difference]: Finished difference Result 1492 states and 2599 transitions. [2018-09-10 10:24:00,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 10:24:00,844 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 189 [2018-09-10 10:24:00,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:24:00,854 INFO L225 Difference]: With dead ends: 1492 [2018-09-10 10:24:00,854 INFO L226 Difference]: Without dead ends: 972 [2018-09-10 10:24:00,858 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-10 10:24:00,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2018-09-10 10:24:00,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 951. [2018-09-10 10:24:00,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 951 states. [2018-09-10 10:24:00,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 1526 transitions. [2018-09-10 10:24:00,916 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 1526 transitions. Word has length 189 [2018-09-10 10:24:00,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:24:00,916 INFO L480 AbstractCegarLoop]: Abstraction has 951 states and 1526 transitions. [2018-09-10 10:24:00,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 10:24:00,916 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 1526 transitions. [2018-09-10 10:24:00,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-10 10:24:00,924 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:24:00,930 INFO L376 BasicCegarLoop]: trace histogram [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] [2018-09-10 10:24:00,931 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:24:00,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1275531176, now seen corresponding path program 1 times [2018-09-10 10:24:00,932 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:24:00,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:00,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:00,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:00,935 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:24:01,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:01,323 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:24:01,324 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:24:01,324 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-10 10:24:01,324 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:24:01,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:24:01,327 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:24:01,327 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:24:01,328 INFO L87 Difference]: Start difference. First operand 951 states and 1526 transitions. Second operand 3 states. [2018-09-10 10:24:03,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:24:03,980 INFO L93 Difference]: Finished difference Result 2745 states and 4537 transitions. [2018-09-10 10:24:03,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:24:03,982 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 192 [2018-09-10 10:24:03,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:24:04,003 INFO L225 Difference]: With dead ends: 2745 [2018-09-10 10:24:04,003 INFO L226 Difference]: Without dead ends: 1800 [2018-09-10 10:24:04,009 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:24:04,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1800 states. [2018-09-10 10:24:04,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1800 to 1798. [2018-09-10 10:24:04,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1798 states. [2018-09-10 10:24:04,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 2775 transitions. [2018-09-10 10:24:04,100 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 2775 transitions. Word has length 192 [2018-09-10 10:24:04,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:24:04,101 INFO L480 AbstractCegarLoop]: Abstraction has 1798 states and 2775 transitions. [2018-09-10 10:24:04,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 10:24:04,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 2775 transitions. [2018-09-10 10:24:04,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-09-10 10:24:04,112 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:24:04,113 INFO L376 BasicCegarLoop]: trace histogram [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] [2018-09-10 10:24:04,113 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:24:04,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1930842229, now seen corresponding path program 1 times [2018-09-10 10:24:04,114 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:24:04,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:04,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:04,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:04,115 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:24:04,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:04,443 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:24:04,444 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:24:04,444 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-10 10:24:04,444 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:24:04,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-10 10:24:04,445 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-10 10:24:04,445 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-09-10 10:24:04,446 INFO L87 Difference]: Start difference. First operand 1798 states and 2775 transitions. Second operand 7 states. [2018-09-10 10:24:07,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:24:07,732 INFO L93 Difference]: Finished difference Result 5591 states and 9817 transitions. [2018-09-10 10:24:07,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-10 10:24:07,733 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 197 [2018-09-10 10:24:07,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:24:07,773 INFO L225 Difference]: With dead ends: 5591 [2018-09-10 10:24:07,774 INFO L226 Difference]: Without dead ends: 3799 [2018-09-10 10:24:07,784 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-09-10 10:24:07,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3799 states. [2018-09-10 10:24:07,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3799 to 3621. [2018-09-10 10:24:07,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3621 states. [2018-09-10 10:24:07,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3621 states to 3621 states and 5701 transitions. [2018-09-10 10:24:07,930 INFO L78 Accepts]: Start accepts. Automaton has 3621 states and 5701 transitions. Word has length 197 [2018-09-10 10:24:07,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:24:07,931 INFO L480 AbstractCegarLoop]: Abstraction has 3621 states and 5701 transitions. [2018-09-10 10:24:07,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-10 10:24:07,931 INFO L276 IsEmpty]: Start isEmpty. Operand 3621 states and 5701 transitions. [2018-09-10 10:24:07,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-09-10 10:24:07,946 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:24:07,947 INFO L376 BasicCegarLoop]: trace histogram [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] [2018-09-10 10:24:07,947 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:24:07,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1434769280, now seen corresponding path program 1 times [2018-09-10 10:24:07,948 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:24:07,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:07,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:07,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:07,949 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:24:07,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:08,234 WARN L175 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 10:24:08,476 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:24:08,476 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:24:08,477 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-10 10:24:08,477 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:24:08,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 10:24:08,478 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 10:24:08,478 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-10 10:24:08,478 INFO L87 Difference]: Start difference. First operand 3621 states and 5701 transitions. Second operand 6 states. [2018-09-10 10:24:10,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:24:10,352 INFO L93 Difference]: Finished difference Result 9454 states and 15492 transitions. [2018-09-10 10:24:10,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 10:24:10,360 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 204 [2018-09-10 10:24:10,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:24:10,394 INFO L225 Difference]: With dead ends: 9454 [2018-09-10 10:24:10,394 INFO L226 Difference]: Without dead ends: 5839 [2018-09-10 10:24:10,417 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-10 10:24:10,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5839 states. [2018-09-10 10:24:10,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5839 to 5751. [2018-09-10 10:24:10,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5751 states. [2018-09-10 10:24:10,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5751 states to 5751 states and 8277 transitions. [2018-09-10 10:24:10,569 INFO L78 Accepts]: Start accepts. Automaton has 5751 states and 8277 transitions. Word has length 204 [2018-09-10 10:24:10,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:24:10,570 INFO L480 AbstractCegarLoop]: Abstraction has 5751 states and 8277 transitions. [2018-09-10 10:24:10,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 10:24:10,570 INFO L276 IsEmpty]: Start isEmpty. Operand 5751 states and 8277 transitions. [2018-09-10 10:24:10,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-09-10 10:24:10,587 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:24:10,587 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:24:10,587 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:24:10,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1141340529, now seen corresponding path program 1 times [2018-09-10 10:24:10,588 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:24:10,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:10,589 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:10,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:10,589 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:24:10,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:11,068 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:24:11,068 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:24:11,068 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:24:11,083 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:11,083 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:24:11,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:11,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:24:11,637 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-10 10:24:11,637 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:24:12,221 WARN L175 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2018-09-10 10:24:12,298 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-10 10:24:12,335 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 10:24:12,336 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-09-10 10:24:12,336 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:24:12,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:24:12,337 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:24:12,337 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-10 10:24:12,338 INFO L87 Difference]: Start difference. First operand 5751 states and 8277 transitions. Second operand 3 states. [2018-09-10 10:24:15,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:24:15,330 INFO L93 Difference]: Finished difference Result 16995 states and 25010 transitions. [2018-09-10 10:24:15,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:24:15,339 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 210 [2018-09-10 10:24:15,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:24:15,394 INFO L225 Difference]: With dead ends: 16995 [2018-09-10 10:24:15,395 INFO L226 Difference]: Without dead ends: 11250 [2018-09-10 10:24:15,420 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 418 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-10 10:24:15,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11250 states. [2018-09-10 10:24:15,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11250 to 11217. [2018-09-10 10:24:15,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11217 states. [2018-09-10 10:24:15,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11217 states to 11217 states and 16162 transitions. [2018-09-10 10:24:15,745 INFO L78 Accepts]: Start accepts. Automaton has 11217 states and 16162 transitions. Word has length 210 [2018-09-10 10:24:15,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:24:15,747 INFO L480 AbstractCegarLoop]: Abstraction has 11217 states and 16162 transitions. [2018-09-10 10:24:15,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 10:24:15,747 INFO L276 IsEmpty]: Start isEmpty. Operand 11217 states and 16162 transitions. [2018-09-10 10:24:15,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-09-10 10:24:15,789 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:24:15,794 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-10 10:24:15,795 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:24:15,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1140594647, now seen corresponding path program 1 times [2018-09-10 10:24:15,795 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:24:15,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:15,798 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:15,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:15,798 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:24:15,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:16,264 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 72 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-09-10 10:24:16,265 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:24:16,265 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-10 10:24:16,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:16,277 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:24:16,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:16,535 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:24:16,863 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 93 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-10 10:24:16,863 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:24:17,101 WARN L175 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-10 10:24:17,351 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 93 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-10 10:24:17,374 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:24:17,374 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:24:17,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:17,390 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:24:17,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:17,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:24:18,301 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 93 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-10 10:24:18,301 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:24:18,830 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 93 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-10 10:24:18,832 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:24:18,833 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-09-10 10:24:18,833 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:24:18,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 10:24:18,835 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 10:24:18,835 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-09-10 10:24:18,836 INFO L87 Difference]: Start difference. First operand 11217 states and 16162 transitions. Second operand 9 states. [2018-09-10 10:24:24,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:24:24,886 INFO L93 Difference]: Finished difference Result 44207 states and 68014 transitions. [2018-09-10 10:24:24,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-10 10:24:24,901 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 246 [2018-09-10 10:24:24,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:24:25,061 INFO L225 Difference]: With dead ends: 44207 [2018-09-10 10:24:25,061 INFO L226 Difference]: Without dead ends: 32996 [2018-09-10 10:24:25,122 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 999 GetRequests, 977 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2018-09-10 10:24:25,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32996 states. [2018-09-10 10:24:26,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32996 to 32706. [2018-09-10 10:24:26,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32706 states. [2018-09-10 10:24:26,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32706 states to 32706 states and 46737 transitions. [2018-09-10 10:24:26,161 INFO L78 Accepts]: Start accepts. Automaton has 32706 states and 46737 transitions. Word has length 246 [2018-09-10 10:24:26,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:24:26,162 INFO L480 AbstractCegarLoop]: Abstraction has 32706 states and 46737 transitions. [2018-09-10 10:24:26,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 10:24:26,162 INFO L276 IsEmpty]: Start isEmpty. Operand 32706 states and 46737 transitions. [2018-09-10 10:24:26,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-09-10 10:24:26,283 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:24:26,284 INFO L376 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, 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] [2018-09-10 10:24:26,284 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:24:26,284 INFO L82 PathProgramCache]: Analyzing trace with hash 756997122, now seen corresponding path program 1 times [2018-09-10 10:24:26,285 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:24:26,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:26,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:26,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:26,287 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:24:26,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:27,469 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:24:27,469 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:24:27,470 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-10 10:24:27,470 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:24:27,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-10 10:24:27,471 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-10 10:24:27,471 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-09-10 10:24:27,471 INFO L87 Difference]: Start difference. First operand 32706 states and 46737 transitions. Second operand 7 states. [2018-09-10 10:24:27,707 WARN L175 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-10 10:24:27,916 WARN L175 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-09-10 10:24:32,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:24:32,306 INFO L93 Difference]: Finished difference Result 101621 states and 149040 transitions. [2018-09-10 10:24:32,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-10 10:24:32,306 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 257 [2018-09-10 10:24:32,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:24:32,683 INFO L225 Difference]: With dead ends: 101621 [2018-09-10 10:24:32,684 INFO L226 Difference]: Without dead ends: 68921 [2018-09-10 10:24:32,787 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2018-09-10 10:24:32,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68921 states. [2018-09-10 10:24:34,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68921 to 67754. [2018-09-10 10:24:34,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67754 states. [2018-09-10 10:24:34,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67754 states to 67754 states and 93892 transitions. [2018-09-10 10:24:34,742 INFO L78 Accepts]: Start accepts. Automaton has 67754 states and 93892 transitions. Word has length 257 [2018-09-10 10:24:34,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:24:34,742 INFO L480 AbstractCegarLoop]: Abstraction has 67754 states and 93892 transitions. [2018-09-10 10:24:34,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-10 10:24:34,742 INFO L276 IsEmpty]: Start isEmpty. Operand 67754 states and 93892 transitions. [2018-09-10 10:24:34,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2018-09-10 10:24:34,848 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:24:34,849 INFO L376 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:24:34,849 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:24:34,849 INFO L82 PathProgramCache]: Analyzing trace with hash 57541374, now seen corresponding path program 1 times [2018-09-10 10:24:34,849 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:24:34,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:34,850 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:34,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:34,851 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:24:34,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:35,403 WARN L175 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-10 10:24:35,598 WARN L175 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-09-10 10:24:35,751 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 94 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:24:35,751 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:24:35,751 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:24:35,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:35,762 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:24:35,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:35,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:24:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-10 10:24:36,095 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:24:36,287 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-10 10:24:36,308 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 10:24:36,308 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-09-10 10:24:36,308 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:24:36,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:24:36,309 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:24:36,309 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-10 10:24:36,311 INFO L87 Difference]: Start difference. First operand 67754 states and 93892 transitions. Second operand 3 states. [2018-09-10 10:24:39,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:24:39,403 INFO L93 Difference]: Finished difference Result 179077 states and 249549 transitions. [2018-09-10 10:24:39,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:24:39,403 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 270 [2018-09-10 10:24:39,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:24:39,892 INFO L225 Difference]: With dead ends: 179077 [2018-09-10 10:24:39,892 INFO L226 Difference]: Without dead ends: 111339 [2018-09-10 10:24:40,073 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 538 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-10 10:24:40,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111339 states. [2018-09-10 10:24:42,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111339 to 111165. [2018-09-10 10:24:42,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111165 states. [2018-09-10 10:24:43,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111165 states to 111165 states and 147830 transitions. [2018-09-10 10:24:43,487 INFO L78 Accepts]: Start accepts. Automaton has 111165 states and 147830 transitions. Word has length 270 [2018-09-10 10:24:43,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:24:43,487 INFO L480 AbstractCegarLoop]: Abstraction has 111165 states and 147830 transitions. [2018-09-10 10:24:43,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 10:24:43,488 INFO L276 IsEmpty]: Start isEmpty. Operand 111165 states and 147830 transitions. [2018-09-10 10:24:43,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2018-09-10 10:24:43,632 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:24:43,633 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:24:43,633 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:24:43,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1157467395, now seen corresponding path program 1 times [2018-09-10 10:24:43,633 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:24:43,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:43,634 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:43,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:43,634 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:24:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:44,180 WARN L175 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-09-10 10:24:44,447 WARN L175 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-10 10:24:44,617 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 108 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:24:44,618 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:24:44,618 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:24:44,625 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:44,625 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:24:44,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:44,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:24:44,946 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-10 10:24:44,946 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:24:45,050 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-10 10:24:45,072 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 10:24:45,072 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-09-10 10:24:45,072 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:24:45,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:24:45,073 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:24:45,073 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-09-10 10:24:45,073 INFO L87 Difference]: Start difference. First operand 111165 states and 147830 transitions. Second operand 3 states. [2018-09-10 10:24:48,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:24:48,238 INFO L93 Difference]: Finished difference Result 283415 states and 377438 transitions. [2018-09-10 10:24:48,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:24:48,238 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 282 [2018-09-10 10:24:48,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:24:48,945 INFO L225 Difference]: With dead ends: 283415 [2018-09-10 10:24:48,945 INFO L226 Difference]: Without dead ends: 172266 [2018-09-10 10:24:50,207 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 562 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-09-10 10:24:50,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172266 states. [2018-09-10 10:24:54,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172266 to 171734. [2018-09-10 10:24:54,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171734 states. [2018-09-10 10:24:54,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171734 states to 171734 states and 223789 transitions. [2018-09-10 10:24:54,842 INFO L78 Accepts]: Start accepts. Automaton has 171734 states and 223789 transitions. Word has length 282 [2018-09-10 10:24:54,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:24:54,843 INFO L480 AbstractCegarLoop]: Abstraction has 171734 states and 223789 transitions. [2018-09-10 10:24:54,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 10:24:54,843 INFO L276 IsEmpty]: Start isEmpty. Operand 171734 states and 223789 transitions. [2018-09-10 10:24:55,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2018-09-10 10:24:55,046 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:24:55,047 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:24:55,047 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:24:55,047 INFO L82 PathProgramCache]: Analyzing trace with hash 935834753, now seen corresponding path program 1 times [2018-09-10 10:24:55,047 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:24:55,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:55,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:55,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:55,049 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:24:55,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:55,780 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 155 proven. 45 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-09-10 10:24:55,781 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:24:55,781 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:24:55,797 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:55,797 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:24:56,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:56,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:24:56,188 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 179 proven. 2 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2018-09-10 10:24:56,188 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:24:56,382 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 155 proven. 45 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-09-10 10:24:56,403 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:24:56,404 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:24:56,422 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:56,422 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:24:57,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:57,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:24:57,240 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 179 proven. 2 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2018-09-10 10:24:57,241 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:24:57,499 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 155 proven. 45 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-09-10 10:24:57,502 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:24:57,503 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-09-10 10:24:57,503 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:24:57,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 10:24:57,505 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 10:24:57,505 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-10 10:24:57,505 INFO L87 Difference]: Start difference. First operand 171734 states and 223789 transitions. Second operand 9 states. [2018-09-10 10:25:05,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:25:05,160 INFO L93 Difference]: Finished difference Result 385330 states and 523260 transitions. [2018-09-10 10:25:05,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-10 10:25:05,161 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 323 [2018-09-10 10:25:05,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:25:06,205 INFO L225 Difference]: With dead ends: 385330 [2018-09-10 10:25:06,205 INFO L226 Difference]: Without dead ends: 214656 [2018-09-10 10:25:07,494 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1314 GetRequests, 1292 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2018-09-10 10:25:07,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214656 states. [2018-09-10 10:25:17,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214656 to 206008. [2018-09-10 10:25:17,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206008 states. [2018-09-10 10:25:17,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206008 states to 206008 states and 272598 transitions. [2018-09-10 10:25:17,950 INFO L78 Accepts]: Start accepts. Automaton has 206008 states and 272598 transitions. Word has length 323 [2018-09-10 10:25:17,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:25:17,950 INFO L480 AbstractCegarLoop]: Abstraction has 206008 states and 272598 transitions. [2018-09-10 10:25:17,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 10:25:17,951 INFO L276 IsEmpty]: Start isEmpty. Operand 206008 states and 272598 transitions. [2018-09-10 10:25:18,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2018-09-10 10:25:18,222 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:25:18,222 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:25:18,222 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:25:18,223 INFO L82 PathProgramCache]: Analyzing trace with hash 564919666, now seen corresponding path program 1 times [2018-09-10 10:25:18,223 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:25:18,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:25:18,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:25:18,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:25:18,224 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:25:18,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:25:18,543 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 155 proven. 30 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2018-09-10 10:25:18,544 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:25:18,544 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:25:18,554 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:25:18,554 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:25:18,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:25:18,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:25:19,717 WARN L175 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2018-09-10 10:25:19,992 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-09-10 10:25:19,993 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:25:20,778 WARN L175 SmtUtils]: Spent 757.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2018-09-10 10:25:21,192 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 130 proven. 51 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-09-10 10:25:21,214 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 10:25:21,214 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 6] total 15 [2018-09-10 10:25:21,215 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:25:21,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 10:25:21,216 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 10:25:21,216 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2018-09-10 10:25:21,216 INFO L87 Difference]: Start difference. First operand 206008 states and 272598 transitions. Second operand 6 states. [2018-09-10 10:25:28,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:25:28,942 INFO L93 Difference]: Finished difference Result 408683 states and 549167 transitions. [2018-09-10 10:25:28,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-10 10:25:28,943 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 323 [2018-09-10 10:25:28,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:25:30,339 INFO L225 Difference]: With dead ends: 408683 [2018-09-10 10:25:30,339 INFO L226 Difference]: Without dead ends: 214616 [2018-09-10 10:25:30,853 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 660 GetRequests, 638 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2018-09-10 10:25:30,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214616 states. [2018-09-10 10:25:36,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214616 to 211787. [2018-09-10 10:25:36,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211787 states. [2018-09-10 10:25:37,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211787 states to 211787 states and 278157 transitions. [2018-09-10 10:25:37,320 INFO L78 Accepts]: Start accepts. Automaton has 211787 states and 278157 transitions. Word has length 323 [2018-09-10 10:25:37,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:25:37,320 INFO L480 AbstractCegarLoop]: Abstraction has 211787 states and 278157 transitions. [2018-09-10 10:25:37,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 10:25:37,321 INFO L276 IsEmpty]: Start isEmpty. Operand 211787 states and 278157 transitions. [2018-09-10 10:25:37,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2018-09-10 10:25:37,641 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:25:37,642 INFO L376 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 10:25:37,642 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:25:37,642 INFO L82 PathProgramCache]: Analyzing trace with hash 461329352, now seen corresponding path program 1 times [2018-09-10 10:25:37,642 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:25:37,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:25:37,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:25:37,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:25:37,643 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:25:37,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:25:38,287 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 164 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-09-10 10:25:38,288 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:25:38,288 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-10 10:25:38,302 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:25:38,302 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:25:38,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:25:38,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:25:38,671 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 181 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-09-10 10:25:38,672 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:25:38,839 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 164 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-09-10 10:25:38,861 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:25:38,861 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 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 [2018-09-10 10:25:38,882 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:25:38,882 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:25:39,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:25:39,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:25:39,639 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 181 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-09-10 10:25:39,640 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:25:39,831 WARN L175 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2018-09-10 10:25:40,025 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 164 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-09-10 10:25:40,028 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:25:40,029 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 7 [2018-09-10 10:25:40,029 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:25:40,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 10:25:40,030 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 10:25:40,030 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-09-10 10:25:40,030 INFO L87 Difference]: Start difference. First operand 211787 states and 278157 transitions. Second operand 6 states. [2018-09-10 10:25:51,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:25:51,555 INFO L93 Difference]: Finished difference Result 457630 states and 649674 transitions. [2018-09-10 10:25:51,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-10 10:25:51,556 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 329 [2018-09-10 10:25:51,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:25:53,022 INFO L225 Difference]: With dead ends: 457630 [2018-09-10 10:25:53,022 INFO L226 Difference]: Without dead ends: 263682 [2018-09-10 10:25:53,510 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1326 GetRequests, 1318 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-09-10 10:25:53,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263682 states. [2018-09-10 10:26:01,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263682 to 248208. [2018-09-10 10:26:01,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248208 states. [2018-09-10 10:26:10,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248208 states to 248208 states and 316434 transitions. [2018-09-10 10:26:10,333 INFO L78 Accepts]: Start accepts. Automaton has 248208 states and 316434 transitions. Word has length 329 [2018-09-10 10:26:10,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:26:10,333 INFO L480 AbstractCegarLoop]: Abstraction has 248208 states and 316434 transitions. [2018-09-10 10:26:10,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 10:26:10,333 INFO L276 IsEmpty]: Start isEmpty. Operand 248208 states and 316434 transitions. [2018-09-10 10:26:10,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2018-09-10 10:26:10,654 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:26:10,655 INFO L376 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 10:26:10,655 INFO L423 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:26:10,656 INFO L82 PathProgramCache]: Analyzing trace with hash 563796443, now seen corresponding path program 1 times [2018-09-10 10:26:10,656 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:26:10,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:26:10,657 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:26:10,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:26:10,657 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:26:10,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:26:11,198 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 150 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:26:11,199 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:26:11,199 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-10 10:26:11,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:26:11,208 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:26:11,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:26:11,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:26:11,613 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-09-10 10:26:11,613 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:26:11,784 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 149 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:26:11,807 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 10:26:11,807 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 5] total 15 [2018-09-10 10:26:11,807 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:26:11,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 10:26:11,808 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 10:26:11,808 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2018-09-10 10:26:11,809 INFO L87 Difference]: Start difference. First operand 248208 states and 316434 transitions. Second operand 5 states. [2018-09-10 10:26:20,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:26:20,713 INFO L93 Difference]: Finished difference Result 506236 states and 669595 transitions. [2018-09-10 10:26:20,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 10:26:20,714 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 336 [2018-09-10 10:26:20,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:26:21,702 INFO L225 Difference]: With dead ends: 506236 [2018-09-10 10:26:21,702 INFO L226 Difference]: Without dead ends: 258551 [2018-09-10 10:26:22,128 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 686 GetRequests, 670 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2018-09-10 10:26:22,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258551 states. [2018-09-10 10:26:28,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258551 to 250300. [2018-09-10 10:26:28,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250300 states. [2018-09-10 10:26:29,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250300 states to 250300 states and 313364 transitions. [2018-09-10 10:26:29,634 INFO L78 Accepts]: Start accepts. Automaton has 250300 states and 313364 transitions. Word has length 336 [2018-09-10 10:26:29,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:26:29,635 INFO L480 AbstractCegarLoop]: Abstraction has 250300 states and 313364 transitions. [2018-09-10 10:26:29,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 10:26:29,635 INFO L276 IsEmpty]: Start isEmpty. Operand 250300 states and 313364 transitions. [2018-09-10 10:26:29,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2018-09-10 10:26:30,000 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:26:30,000 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:26:30,000 INFO L423 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:26:30,000 INFO L82 PathProgramCache]: Analyzing trace with hash -41709996, now seen corresponding path program 1 times [2018-09-10 10:26:30,001 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:26:30,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:26:30,001 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:26:30,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:26:30,001 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:26:30,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:26:30,417 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 164 proven. 79 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-09-10 10:26:30,417 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:26:30,417 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:26:30,428 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:26:30,428 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:26:30,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:26:30,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:26:30,845 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 206 proven. 2 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2018-09-10 10:26:30,845 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:26:31,842 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 178 proven. 30 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2018-09-10 10:26:31,864 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:26:31,864 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:26:31,881 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:26:31,881 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:26:32,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:26:32,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:26:32,718 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 206 proven. 2 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2018-09-10 10:26:32,719 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:26:32,832 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 178 proven. 30 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2018-09-10 10:26:32,835 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:26:32,836 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5, 5, 5] total 15 [2018-09-10 10:26:32,836 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:26:32,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-10 10:26:32,837 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-10 10:26:32,837 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-09-10 10:26:32,838 INFO L87 Difference]: Start difference. First operand 250300 states and 313364 transitions. Second operand 13 states. [2018-09-10 10:26:54,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:26:54,567 INFO L93 Difference]: Finished difference Result 685985 states and 978454 transitions. [2018-09-10 10:26:54,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-10 10:26:54,568 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 344 [2018-09-10 10:26:54,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:26:58,201 INFO L225 Difference]: With dead ends: 685985 [2018-09-10 10:26:58,201 INFO L226 Difference]: Without dead ends: 488176 [2018-09-10 10:26:58,544 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1435 GetRequests, 1393 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=383, Invalid=1177, Unknown=0, NotChecked=0, Total=1560 [2018-09-10 10:26:58,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488176 states. [2018-09-10 10:27:13,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488176 to 474577. [2018-09-10 10:27:13,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 474577 states.