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/Problem18_label26_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-10 12:36:38,833 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-10 12:36:38,835 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-10 12:36:38,854 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-10 12:36:38,854 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-10 12:36:38,856 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-10 12:36:38,858 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-10 12:36:38,860 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-10 12:36:38,862 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-10 12:36:38,863 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-10 12:36:38,864 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-10 12:36:38,864 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-10 12:36:38,865 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-10 12:36:38,866 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-10 12:36:38,868 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-10 12:36:38,869 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-10 12:36:38,869 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-10 12:36:38,871 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-10 12:36:38,873 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-10 12:36:38,875 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-10 12:36:38,876 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-10 12:36:38,878 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-10 12:36:38,880 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-10 12:36:38,881 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-10 12:36:38,881 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-10 12:36:38,882 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-10 12:36:38,883 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-10 12:36:38,884 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-10 12:36:38,885 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-10 12:36:38,886 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-10 12:36:38,886 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-10 12:36:38,887 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-10 12:36:38,887 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-10 12:36:38,888 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-10 12:36:38,889 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-10 12:36:38,889 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-10 12:36:38,890 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 12:36:38,907 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-10 12:36:38,908 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-10 12:36:38,908 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-10 12:36:38,909 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-10 12:36:38,909 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-10 12:36:38,909 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-10 12:36:38,909 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-10 12:36:38,910 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-10 12:36:38,910 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-10 12:36:38,910 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-10 12:36:38,910 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-10 12:36:38,911 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-10 12:36:38,911 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-10 12:36:38,911 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-10 12:36:38,912 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-10 12:36:38,912 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-10 12:36:38,912 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-10 12:36:38,912 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-10 12:36:38,912 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-10 12:36:38,913 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-10 12:36:38,913 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-10 12:36:38,913 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-10 12:36:38,913 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-10 12:36:38,913 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 12:36:38,914 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-10 12:36:38,914 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-10 12:36:38,914 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-10 12:36:38,914 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-10 12:36:38,914 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-10 12:36:38,915 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-10 12:36:38,915 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-10 12:36:38,915 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-10 12:36:38,915 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-10 12:36:38,984 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-10 12:36:38,996 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-10 12:36:39,000 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-10 12:36:39,002 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-10 12:36:39,002 INFO L276 PluginConnector]: CDTParser initialized [2018-09-10 12:36:39,003 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label26_true-unreach-call.c [2018-09-10 12:36:39,357 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5af849c4b/4016e393bc4b43f8a196dcb65b559e5b/FLAG3edacea30 [2018-09-10 12:36:39,797 INFO L276 CDTParser]: Found 1 translation units. [2018-09-10 12:36:39,798 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label26_true-unreach-call.c [2018-09-10 12:36:39,823 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5af849c4b/4016e393bc4b43f8a196dcb65b559e5b/FLAG3edacea30 [2018-09-10 12:36:39,840 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5af849c4b/4016e393bc4b43f8a196dcb65b559e5b [2018-09-10 12:36:39,853 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-10 12:36:39,858 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-10 12:36:39,860 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-10 12:36:39,860 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-10 12:36:39,867 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-10 12:36:39,869 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 12:36:39" (1/1) ... [2018-09-10 12:36:39,872 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@541f7e7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:36:39, skipping insertion in model container [2018-09-10 12:36:39,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 12:36:39" (1/1) ... [2018-09-10 12:36:40,172 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-10 12:36:40,953 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 12:36:40,975 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-10 12:36:41,537 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 12:36:41,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:36:41 WrapperNode [2018-09-10 12:36:41,687 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-10 12:36:41,688 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-10 12:36:41,688 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-10 12:36:41,688 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-10 12:36:41,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:36:41" (1/1) ... [2018-09-10 12:36:41,752 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:36:41" (1/1) ... [2018-09-10 12:36:41,863 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-10 12:36:41,864 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-10 12:36:41,864 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-10 12:36:41,864 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-10 12:36:42,263 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:36:41" (1/1) ... [2018-09-10 12:36:42,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:36:41" (1/1) ... [2018-09-10 12:36:42,304 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:36:41" (1/1) ... [2018-09-10 12:36:42,304 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:36:41" (1/1) ... [2018-09-10 12:36:42,396 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:36:41" (1/1) ... [2018-09-10 12:36:42,441 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:36:41" (1/1) ... [2018-09-10 12:36:42,474 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:36:41" (1/1) ... [2018-09-10 12:36:42,505 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-10 12:36:42,506 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-10 12:36:42,506 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-10 12:36:42,506 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-10 12:36:42,507 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:36:41" (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 12:36:42,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-10 12:36:42,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-10 12:36:42,582 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 12:36:42,582 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 12:36:42,582 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_output3 [2018-09-10 12:36:42,582 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_output3 [2018-09-10 12:36:42,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-10 12:36:42,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-10 12:36:42,583 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-10 12:36:42,583 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-10 12:36:42,583 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output2 [2018-09-10 12:36:42,583 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output2 [2018-09-10 12:36:50,192 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-10 12:36:50,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 12:36:50 BoogieIcfgContainer [2018-09-10 12:36:50,194 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-10 12:36:50,195 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-10 12:36:50,195 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-10 12:36:50,199 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-10 12:36:50,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 12:36:39" (1/3) ... [2018-09-10 12:36:50,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a4a505 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 12:36:50, skipping insertion in model container [2018-09-10 12:36:50,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:36:41" (2/3) ... [2018-09-10 12:36:50,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a4a505 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 12:36:50, skipping insertion in model container [2018-09-10 12:36:50,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 12:36:50" (3/3) ... [2018-09-10 12:36:50,203 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label26_true-unreach-call.c [2018-09-10 12:36:50,213 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-10 12:36:50,225 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-10 12:36:50,290 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-10 12:36:50,291 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-10 12:36:50,291 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-10 12:36:50,291 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-10 12:36:50,291 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-10 12:36:50,292 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-10 12:36:50,292 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-10 12:36:50,292 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-10 12:36:50,292 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-10 12:36:50,333 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states. [2018-09-10 12:36:50,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-10 12:36:50,344 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:36:50,345 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] [2018-09-10 12:36:50,346 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 12:36:50,351 INFO L82 PathProgramCache]: Analyzing trace with hash 892405449, now seen corresponding path program 1 times [2018-09-10 12:36:50,353 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:36:50,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:36:50,407 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:36:50,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:36:50,407 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:36:50,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:36:50,864 WARN L175 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 12:36:51,019 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 12:36:51,023 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:36:51,026 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-10 12:36:51,026 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:36:51,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:36:51,059 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:36:51,060 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 12:36:51,062 INFO L87 Difference]: Start difference. First operand 775 states. Second operand 3 states. [2018-09-10 12:36:57,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:36:57,883 INFO L93 Difference]: Finished difference Result 2251 states and 4322 transitions. [2018-09-10 12:36:57,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:36:57,887 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2018-09-10 12:36:57,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:36:57,921 INFO L225 Difference]: With dead ends: 2251 [2018-09-10 12:36:57,925 INFO L226 Difference]: Without dead ends: 1474 [2018-09-10 12:36:57,938 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 12:36:57,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2018-09-10 12:36:58,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1474. [2018-09-10 12:36:58,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1474 states. [2018-09-10 12:36:58,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 2721 transitions. [2018-09-10 12:36:58,105 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 2721 transitions. Word has length 69 [2018-09-10 12:36:58,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:36:58,106 INFO L480 AbstractCegarLoop]: Abstraction has 1474 states and 2721 transitions. [2018-09-10 12:36:58,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:36:58,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 2721 transitions. [2018-09-10 12:36:58,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-09-10 12:36:58,114 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:36:58,114 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:36:58,114 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 12:36:58,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1034124894, now seen corresponding path program 1 times [2018-09-10 12:36:58,115 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:36:58,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:36:58,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:36:58,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:36:58,117 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:36:58,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:36:58,426 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:36:58,426 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:36:58,426 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-10 12:36:58,427 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:36:58,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 12:36:58,429 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 12:36:58,429 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-10 12:36:58,429 INFO L87 Difference]: Start difference. First operand 1474 states and 2721 transitions. Second operand 6 states. [2018-09-10 12:37:15,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:37:15,210 INFO L93 Difference]: Finished difference Result 5907 states and 11160 transitions. [2018-09-10 12:37:15,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-10 12:37:15,210 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2018-09-10 12:37:15,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:37:15,242 INFO L225 Difference]: With dead ends: 5907 [2018-09-10 12:37:15,243 INFO L226 Difference]: Without dead ends: 4439 [2018-09-10 12:37:15,257 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-09-10 12:37:15,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4439 states. [2018-09-10 12:37:15,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4439 to 4389. [2018-09-10 12:37:15,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4389 states. [2018-09-10 12:37:15,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4389 states to 4389 states and 7149 transitions. [2018-09-10 12:37:15,392 INFO L78 Accepts]: Start accepts. Automaton has 4389 states and 7149 transitions. Word has length 141 [2018-09-10 12:37:15,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:37:15,393 INFO L480 AbstractCegarLoop]: Abstraction has 4389 states and 7149 transitions. [2018-09-10 12:37:15,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 12:37:15,393 INFO L276 IsEmpty]: Start isEmpty. Operand 4389 states and 7149 transitions. [2018-09-10 12:37:15,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-10 12:37:15,403 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:37:15,403 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:37:15,404 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 12:37:15,404 INFO L82 PathProgramCache]: Analyzing trace with hash 2134336357, now seen corresponding path program 1 times [2018-09-10 12:37:15,404 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:37:15,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:37:15,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:37:15,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:37:15,406 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:37:15,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:37:15,638 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:37:15,639 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:37:15,639 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-10 12:37:15,639 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:37:15,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 12:37:15,640 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 12:37:15,640 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-10 12:37:15,641 INFO L87 Difference]: Start difference. First operand 4389 states and 7149 transitions. Second operand 6 states. [2018-09-10 12:37:25,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:37:25,175 INFO L93 Difference]: Finished difference Result 17449 states and 29632 transitions. [2018-09-10 12:37:25,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 12:37:25,175 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 164 [2018-09-10 12:37:25,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:37:25,243 INFO L225 Difference]: With dead ends: 17449 [2018-09-10 12:37:25,243 INFO L226 Difference]: Without dead ends: 13066 [2018-09-10 12:37:25,280 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-10 12:37:25,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13066 states. [2018-09-10 12:37:25,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13066 to 12965. [2018-09-10 12:37:25,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12965 states. [2018-09-10 12:37:25,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12965 states to 12965 states and 20063 transitions. [2018-09-10 12:37:25,633 INFO L78 Accepts]: Start accepts. Automaton has 12965 states and 20063 transitions. Word has length 164 [2018-09-10 12:37:25,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:37:25,634 INFO L480 AbstractCegarLoop]: Abstraction has 12965 states and 20063 transitions. [2018-09-10 12:37:25,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 12:37:25,634 INFO L276 IsEmpty]: Start isEmpty. Operand 12965 states and 20063 transitions. [2018-09-10 12:37:25,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2018-09-10 12:37:25,640 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:37:25,640 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:37:25,640 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 12:37:25,641 INFO L82 PathProgramCache]: Analyzing trace with hash -336106029, now seen corresponding path program 1 times [2018-09-10 12:37:25,641 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:37:25,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:37:25,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:37:25,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:37:25,642 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:37:25,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:37:25,853 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 124 proven. 65 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 12:37:25,854 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:37:25,854 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 12:37:25,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:37:25,868 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:37:25,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:37:25,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:37:26,298 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-09-10 12:37:26,299 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:37:27,090 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 124 proven. 65 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 12:37:27,122 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:37:27,123 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2018-09-10 12:37:27,123 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:37:27,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 12:37:27,124 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 12:37:27,124 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2018-09-10 12:37:27,124 INFO L87 Difference]: Start difference. First operand 12965 states and 20063 transitions. Second operand 5 states. [2018-09-10 12:37:34,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:37:34,863 INFO L93 Difference]: Finished difference Result 34755 states and 57144 transitions. [2018-09-10 12:37:34,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 12:37:34,864 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 229 [2018-09-10 12:37:34,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:37:34,991 INFO L225 Difference]: With dead ends: 34755 [2018-09-10 12:37:34,991 INFO L226 Difference]: Without dead ends: 21796 [2018-09-10 12:37:35,056 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 453 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2018-09-10 12:37:35,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21796 states. [2018-09-10 12:37:35,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21796 to 21665. [2018-09-10 12:37:35,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21665 states. [2018-09-10 12:37:35,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21665 states to 21665 states and 30240 transitions. [2018-09-10 12:37:35,619 INFO L78 Accepts]: Start accepts. Automaton has 21665 states and 30240 transitions. Word has length 229 [2018-09-10 12:37:35,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:37:35,619 INFO L480 AbstractCegarLoop]: Abstraction has 21665 states and 30240 transitions. [2018-09-10 12:37:35,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 12:37:35,620 INFO L276 IsEmpty]: Start isEmpty. Operand 21665 states and 30240 transitions. [2018-09-10 12:37:35,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2018-09-10 12:37:35,631 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:37:35,632 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:37:35,632 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 12:37:35,632 INFO L82 PathProgramCache]: Analyzing trace with hash -506966937, now seen corresponding path program 1 times [2018-09-10 12:37:35,633 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:37:35,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:37:35,634 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:37:35,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:37:35,634 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:37:35,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:37:36,112 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 259 proven. 69 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2018-09-10 12:37:36,112 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:37:36,112 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 12:37:36,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:37:36,333 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:37:36,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:37:36,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:37:36,938 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 351 proven. 2 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-09-10 12:37:36,939 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:37:37,197 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 259 proven. 69 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2018-09-10 12:37:37,218 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:37:37,218 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 12:37:37,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:37:37,234 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:37:37,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:37:37,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:37:37,678 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 351 proven. 2 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-09-10 12:37:37,678 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:37:38,308 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 259 proven. 69 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2018-09-10 12:37:38,310 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:37:38,311 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 11 [2018-09-10 12:37:38,311 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:37:38,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-10 12:37:38,312 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-10 12:37:38,312 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-10 12:37:38,313 INFO L87 Difference]: Start difference. First operand 21665 states and 30240 transitions. Second operand 8 states. [2018-09-10 12:37:49,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:37:49,127 INFO L93 Difference]: Finished difference Result 52046 states and 77158 transitions. [2018-09-10 12:37:49,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-10 12:37:49,129 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 352 [2018-09-10 12:37:49,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:37:49,255 INFO L225 Difference]: With dead ends: 52046 [2018-09-10 12:37:49,255 INFO L226 Difference]: Without dead ends: 30387 [2018-09-10 12:37:49,307 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1423 GetRequests, 1403 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2018-09-10 12:37:49,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30387 states. [2018-09-10 12:37:49,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30387 to 30365. [2018-09-10 12:37:49,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30365 states. [2018-09-10 12:37:49,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30365 states to 30365 states and 42875 transitions. [2018-09-10 12:37:49,868 INFO L78 Accepts]: Start accepts. Automaton has 30365 states and 42875 transitions. Word has length 352 [2018-09-10 12:37:49,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:37:49,869 INFO L480 AbstractCegarLoop]: Abstraction has 30365 states and 42875 transitions. [2018-09-10 12:37:49,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-10 12:37:49,869 INFO L276 IsEmpty]: Start isEmpty. Operand 30365 states and 42875 transitions. [2018-09-10 12:37:49,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2018-09-10 12:37:49,882 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:37:49,883 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:37:49,884 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 12:37:49,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1820443023, now seen corresponding path program 1 times [2018-09-10 12:37:49,884 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:37:49,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:37:49,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:37:49,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:37:49,886 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:37:49,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:37:50,215 WARN L175 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 12:37:50,777 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 124 proven. 90 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 12:37:50,777 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:37:50,777 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 12:37:50,785 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:37:50,785 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:37:50,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:37:50,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:37:51,147 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-09-10 12:37:51,147 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:37:51,687 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 124 proven. 90 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 12:37:51,708 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:37:51,709 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2018-09-10 12:37:51,709 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:37:51,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 12:37:51,710 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 12:37:51,710 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-09-10 12:37:51,710 INFO L87 Difference]: Start difference. First operand 30365 states and 42875 transitions. Second operand 5 states. [2018-09-10 12:37:57,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:37:57,632 INFO L93 Difference]: Finished difference Result 67520 states and 98325 transitions. [2018-09-10 12:37:57,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 12:37:57,632 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 399 [2018-09-10 12:37:57,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:37:57,765 INFO L225 Difference]: With dead ends: 67520 [2018-09-10 12:37:57,765 INFO L226 Difference]: Without dead ends: 37161 [2018-09-10 12:37:57,821 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 807 GetRequests, 792 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2018-09-10 12:37:57,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37161 states. [2018-09-10 12:37:58,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37161 to 36899. [2018-09-10 12:37:58,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36899 states. [2018-09-10 12:37:58,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36899 states to 36899 states and 48983 transitions. [2018-09-10 12:37:58,463 INFO L78 Accepts]: Start accepts. Automaton has 36899 states and 48983 transitions. Word has length 399 [2018-09-10 12:37:58,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:37:58,464 INFO L480 AbstractCegarLoop]: Abstraction has 36899 states and 48983 transitions. [2018-09-10 12:37:58,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 12:37:58,464 INFO L276 IsEmpty]: Start isEmpty. Operand 36899 states and 48983 transitions. [2018-09-10 12:37:58,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2018-09-10 12:37:58,481 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:37:58,482 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:37:58,482 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 12:37:58,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1950495394, now seen corresponding path program 1 times [2018-09-10 12:37:58,483 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:37:58,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:37:58,484 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:37:58,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:37:58,485 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:37:58,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:37:58,977 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 119 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:37:58,978 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:37:58,978 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 12:37:58,986 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:37:58,987 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:37:59,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:37:59,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:37:59,260 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-09-10 12:37:59,260 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:37:59,404 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-09-10 12:37:59,425 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 12:37:59,425 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 10 [2018-09-10 12:37:59,425 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:37:59,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:37:59,426 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:37:59,426 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-09-10 12:37:59,427 INFO L87 Difference]: Start difference. First operand 36899 states and 48983 transitions. Second operand 3 states. [2018-09-10 12:38:03,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:38:03,945 INFO L93 Difference]: Finished difference Result 71728 states and 95730 transitions. [2018-09-10 12:38:03,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:38:03,946 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 416 [2018-09-10 12:38:03,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:38:04,018 INFO L225 Difference]: With dead ends: 71728 [2018-09-10 12:38:04,018 INFO L226 Difference]: Without dead ends: 34835 [2018-09-10 12:38:04,079 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 843 GetRequests, 833 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-09-10 12:38:04,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34835 states. [2018-09-10 12:38:04,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34835 to 34126. [2018-09-10 12:38:04,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34126 states. [2018-09-10 12:38:04,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34126 states to 34126 states and 41706 transitions. [2018-09-10 12:38:04,566 INFO L78 Accepts]: Start accepts. Automaton has 34126 states and 41706 transitions. Word has length 416 [2018-09-10 12:38:04,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:38:04,567 INFO L480 AbstractCegarLoop]: Abstraction has 34126 states and 41706 transitions. [2018-09-10 12:38:04,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:38:04,567 INFO L276 IsEmpty]: Start isEmpty. Operand 34126 states and 41706 transitions. [2018-09-10 12:38:04,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2018-09-10 12:38:04,582 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:38:04,583 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 12:38:04,583 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 12:38:04,583 INFO L82 PathProgramCache]: Analyzing trace with hash 478327029, now seen corresponding path program 1 times [2018-09-10 12:38:04,583 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:38:04,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:38:04,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:38:04,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:38:04,585 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:38:04,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:38:04,995 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2018-09-10 12:38:04,995 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:38:04,995 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-10 12:38:04,996 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:38:04,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-10 12:38:04,996 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-10 12:38:04,997 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 12:38:04,997 INFO L87 Difference]: Start difference. First operand 34126 states and 41706 transitions. Second operand 4 states. [2018-09-10 12:38:13,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:38:13,918 INFO L93 Difference]: Finished difference Result 81749 states and 101693 transitions. [2018-09-10 12:38:13,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-10 12:38:13,919 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 450 [2018-09-10 12:38:13,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:38:14,002 INFO L225 Difference]: With dead ends: 81749 [2018-09-10 12:38:14,002 INFO L226 Difference]: Without dead ends: 47629 [2018-09-10 12:38:14,037 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 12:38:14,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47629 states. [2018-09-10 12:38:14,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47629 to 46220. [2018-09-10 12:38:14,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46220 states. [2018-09-10 12:38:14,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46220 states to 46220 states and 55659 transitions. [2018-09-10 12:38:14,674 INFO L78 Accepts]: Start accepts. Automaton has 46220 states and 55659 transitions. Word has length 450 [2018-09-10 12:38:14,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:38:14,675 INFO L480 AbstractCegarLoop]: Abstraction has 46220 states and 55659 transitions. [2018-09-10 12:38:14,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-10 12:38:14,675 INFO L276 IsEmpty]: Start isEmpty. Operand 46220 states and 55659 transitions. [2018-09-10 12:38:14,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 692 [2018-09-10 12:38:14,726 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:38:14,727 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:38:14,727 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 12:38:14,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1150640352, now seen corresponding path program 1 times [2018-09-10 12:38:14,727 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:38:14,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:38:14,728 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:38:14,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:38:14,728 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:38:14,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:38:15,251 WARN L175 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 12:38:16,779 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 71 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:38:16,779 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:38:16,779 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 12:38:16,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:38:16,787 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:38:16,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:38:16,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:38:17,508 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2018-09-10 12:38:17,508 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:38:17,843 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2018-09-10 12:38:17,864 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 12:38:17,864 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [17] total 19 [2018-09-10 12:38:17,864 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:38:17,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:38:17,865 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:38:17,866 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2018-09-10 12:38:17,866 INFO L87 Difference]: Start difference. First operand 46220 states and 55659 transitions. Second operand 3 states. [2018-09-10 12:38:24,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:38:24,162 INFO L93 Difference]: Finished difference Result 107886 states and 130757 transitions. [2018-09-10 12:38:24,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:38:24,164 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 691 [2018-09-10 12:38:24,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:38:24,277 INFO L225 Difference]: With dead ends: 107886 [2018-09-10 12:38:24,278 INFO L226 Difference]: Without dead ends: 61672 [2018-09-10 12:38:24,325 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1402 GetRequests, 1383 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2018-09-10 12:38:24,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61672 states. [2018-09-10 12:38:25,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61672 to 60969. [2018-09-10 12:38:25,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60969 states. [2018-09-10 12:38:25,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60969 states to 60969 states and 72041 transitions. [2018-09-10 12:38:25,130 INFO L78 Accepts]: Start accepts. Automaton has 60969 states and 72041 transitions. Word has length 691 [2018-09-10 12:38:25,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:38:25,132 INFO L480 AbstractCegarLoop]: Abstraction has 60969 states and 72041 transitions. [2018-09-10 12:38:25,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:38:25,132 INFO L276 IsEmpty]: Start isEmpty. Operand 60969 states and 72041 transitions. [2018-09-10 12:38:25,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 993 [2018-09-10 12:38:25,275 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:38:25,276 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:38:25,276 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 12:38:25,276 INFO L82 PathProgramCache]: Analyzing trace with hash 736332360, now seen corresponding path program 1 times [2018-09-10 12:38:25,277 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:38:25,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:38:25,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:38:25,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:38:25,278 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:38:25,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:38:26,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 379 proven. 320 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-09-10 12:38:26,514 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:38:26,514 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:38:26,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:38:26,522 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:38:26,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:38:26,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:38:27,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 803 proven. 2 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2018-09-10 12:38:27,311 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:38:28,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 379 proven. 320 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-09-10 12:38:28,200 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:38:28,200 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 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:38:28,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:38:28,219 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:38:28,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:38:28,874 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:38:29,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 803 proven. 2 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2018-09-10 12:38:29,661 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:38:30,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 379 proven. 320 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-09-10 12:38:30,582 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:38:30,583 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-09-10 12:38:30,583 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:38:30,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 12:38:30,585 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 12:38:30,585 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-09-10 12:38:30,585 INFO L87 Difference]: Start difference. First operand 60969 states and 72041 transitions. Second operand 9 states. [2018-09-10 12:38:48,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:38:48,999 INFO L93 Difference]: Finished difference Result 158729 states and 196420 transitions. [2018-09-10 12:38:48,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-10 12:38:48,999 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 992 [2018-09-10 12:38:49,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:38:49,230 INFO L225 Difference]: With dead ends: 158729 [2018-09-10 12:38:49,231 INFO L226 Difference]: Without dead ends: 97766 [2018-09-10 12:38:49,322 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3990 GetRequests, 3967 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2018-09-10 12:38:49,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97766 states. [2018-09-10 12:38:50,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97766 to 96291. [2018-09-10 12:38:50,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96291 states. [2018-09-10 12:38:50,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96291 states to 96291 states and 115276 transitions. [2018-09-10 12:38:50,565 INFO L78 Accepts]: Start accepts. Automaton has 96291 states and 115276 transitions. Word has length 992 [2018-09-10 12:38:50,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:38:50,566 INFO L480 AbstractCegarLoop]: Abstraction has 96291 states and 115276 transitions. [2018-09-10 12:38:50,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 12:38:50,566 INFO L276 IsEmpty]: Start isEmpty. Operand 96291 states and 115276 transitions. [2018-09-10 12:38:50,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1114 [2018-09-10 12:38:50,704 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:38:50,705 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:38:50,705 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 12:38:50,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1853836206, now seen corresponding path program 1 times [2018-09-10 12:38:50,706 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:38:50,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:38:50,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:38:50,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:38:50,707 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:38:50,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:38:52,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 589 proven. 96 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2018-09-10 12:38:52,203 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:38:52,203 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 12:38:52,215 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:38:52,215 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:38:52,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:38:52,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:38:53,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 1079 proven. 2 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2018-09-10 12:38:53,336 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:38:54,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 589 proven. 96 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2018-09-10 12:38:54,046 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:38:54,047 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 12:38:54,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:38:54,062 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:38:54,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:38:54,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:38:55,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 1079 proven. 2 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2018-09-10 12:38:55,745 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:38:56,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 589 proven. 96 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2018-09-10 12:38:56,447 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:38:56,447 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-09-10 12:38:56,447 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:38:56,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 12:38:56,449 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 12:38:56,449 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-10 12:38:56,450 INFO L87 Difference]: Start difference. First operand 96291 states and 115276 transitions. Second operand 9 states. [2018-09-10 12:39:07,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:39:07,269 INFO L93 Difference]: Finished difference Result 193987 states and 231756 transitions. [2018-09-10 12:39:07,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-10 12:39:07,270 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1113 [2018-09-10 12:39:07,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:39:07,546 INFO L225 Difference]: With dead ends: 193987 [2018-09-10 12:39:07,547 INFO L226 Difference]: Without dead ends: 97702 [2018-09-10 12:39:07,731 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4470 GetRequests, 4449 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2018-09-10 12:39:07,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97702 states. [2018-09-10 12:39:09,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97702 to 97348. [2018-09-10 12:39:09,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97348 states. [2018-09-10 12:39:09,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97348 states to 97348 states and 111291 transitions. [2018-09-10 12:39:09,251 INFO L78 Accepts]: Start accepts. Automaton has 97348 states and 111291 transitions. Word has length 1113 [2018-09-10 12:39:09,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:39:09,251 INFO L480 AbstractCegarLoop]: Abstraction has 97348 states and 111291 transitions. [2018-09-10 12:39:09,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 12:39:09,251 INFO L276 IsEmpty]: Start isEmpty. Operand 97348 states and 111291 transitions. [2018-09-10 12:39:09,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1215 [2018-09-10 12:39:09,318 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:39:09,319 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:39:09,319 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 12:39:09,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1391320876, now seen corresponding path program 1 times [2018-09-10 12:39:09,320 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:39:09,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:39:09,321 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:39:09,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:39:09,321 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:39:09,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:39:10,130 WARN L175 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 7 [2018-09-10 12:39:11,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1266 backedges. 376 proven. 456 refuted. 0 times theorem prover too weak. 434 trivial. 0 not checked. [2018-09-10 12:39:11,533 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:39:11,533 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 12:39:11,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:39:11,542 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:39:11,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:39:11,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:39:12,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1266 backedges. 1081 proven. 2 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2018-09-10 12:39:12,522 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:39:13,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1266 backedges. 485 proven. 115 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2018-09-10 12:39:13,439 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:39:13,440 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 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:39:13,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:39:13,455 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:39:14,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:39:14,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:39:15,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1266 backedges. 1081 proven. 2 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2018-09-10 12:39:15,161 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:39:15,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1266 backedges. 485 proven. 115 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2018-09-10 12:39:15,894 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:39:15,896 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5, 5, 5] total 15 [2018-09-10 12:39:15,896 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:39:15,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-10 12:39:15,898 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-10 12:39:15,898 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-09-10 12:39:15,898 INFO L87 Difference]: Start difference. First operand 97348 states and 111291 transitions. Second operand 13 states. [2018-09-10 12:39:33,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:39:33,643 INFO L93 Difference]: Finished difference Result 247920 states and 286269 transitions. [2018-09-10 12:39:33,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-10 12:39:33,643 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 1214 [2018-09-10 12:39:33,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:39:33,883 INFO L225 Difference]: With dead ends: 247920 [2018-09-10 12:39:33,883 INFO L226 Difference]: Without dead ends: 128973 [2018-09-10 12:39:34,026 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4929 GetRequests, 4880 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=513, Invalid=1649, Unknown=0, NotChecked=0, Total=2162 [2018-09-10 12:39:34,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128973 states. [2018-09-10 12:39:35,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128973 to 126729. [2018-09-10 12:39:35,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126729 states. [2018-09-10 12:39:35,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126729 states to 126729 states and 141383 transitions. [2018-09-10 12:39:35,596 INFO L78 Accepts]: Start accepts. Automaton has 126729 states and 141383 transitions. Word has length 1214 [2018-09-10 12:39:35,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:39:35,597 INFO L480 AbstractCegarLoop]: Abstraction has 126729 states and 141383 transitions. [2018-09-10 12:39:35,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-10 12:39:35,597 INFO L276 IsEmpty]: Start isEmpty. Operand 126729 states and 141383 transitions. [2018-09-10 12:39:35,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1371 [2018-09-10 12:39:35,700 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:39:35,701 INFO L376 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:39:35,701 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 12:39:35,702 INFO L82 PathProgramCache]: Analyzing trace with hash 687426872, now seen corresponding path program 1 times [2018-09-10 12:39:35,702 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:39:35,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:39:35,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:39:35,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:39:35,703 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:39:35,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:39:39,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2279 backedges. 488 proven. 700 refuted. 0 times theorem prover too weak. 1091 trivial. 0 not checked. [2018-09-10 12:39:39,129 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:39:39,129 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:39:39,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:39:39,137 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:39:39,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:39:39,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:39:40,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2279 backedges. 1327 proven. 2 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2018-09-10 12:39:40,657 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:39:41,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2279 backedges. 488 proven. 717 refuted. 0 times theorem prover too weak. 1074 trivial. 0 not checked. [2018-09-10 12:39:41,782 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:39:41,782 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 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:39:41,799 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:39:41,799 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:39:42,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:39:42,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:39:43,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2279 backedges. 1327 proven. 2 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2018-09-10 12:39:43,422 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:39:44,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2279 backedges. 488 proven. 717 refuted. 0 times theorem prover too weak. 1074 trivial. 0 not checked. [2018-09-10 12:39:44,560 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:39:44,561 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5, 5, 5] total 25 [2018-09-10 12:39:44,561 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:39:44,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-10 12:39:44,563 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-10 12:39:44,563 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2018-09-10 12:39:44,564 INFO L87 Difference]: Start difference. First operand 126729 states and 141383 transitions. Second operand 16 states. [2018-09-10 12:39:47,480 WARN L175 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 18 [2018-09-10 12:40:09,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:40:09,734 INFO L93 Difference]: Finished difference Result 237756 states and 265456 transitions. [2018-09-10 12:40:09,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-10 12:40:09,735 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 1370 [2018-09-10 12:40:09,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:40:09,903 INFO L225 Difference]: With dead ends: 237756 [2018-09-10 12:40:09,903 INFO L226 Difference]: Without dead ends: 97172 [2018-09-10 12:40:10,004 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5564 GetRequests, 5501 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2018-09-10 12:40:10,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97172 states. [2018-09-10 12:40:10,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97172 to 91517. [2018-09-10 12:40:10,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91517 states. [2018-09-10 12:40:10,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91517 states to 91517 states and 96709 transitions. [2018-09-10 12:40:10,936 INFO L78 Accepts]: Start accepts. Automaton has 91517 states and 96709 transitions. Word has length 1370 [2018-09-10 12:40:10,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:40:10,936 INFO L480 AbstractCegarLoop]: Abstraction has 91517 states and 96709 transitions. [2018-09-10 12:40:10,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-10 12:40:10,936 INFO L276 IsEmpty]: Start isEmpty. Operand 91517 states and 96709 transitions. [2018-09-10 12:40:10,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1461 [2018-09-10 12:40:10,996 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:40:10,997 INFO L376 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:40:10,997 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 12:40:10,997 INFO L82 PathProgramCache]: Analyzing trace with hash -561517740, now seen corresponding path program 1 times [2018-09-10 12:40:10,997 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:40:10,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:40:10,998 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:40:10,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:40:10,998 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:40:11,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:40:14,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2350 backedges. 668 proven. 932 refuted. 0 times theorem prover too weak. 750 trivial. 0 not checked. [2018-09-10 12:40:14,923 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:40:14,923 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:40:14,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:40:14,933 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:40:15,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:40:15,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:40:16,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2350 backedges. 596 proven. 0 refuted. 0 times theorem prover too weak. 1754 trivial. 0 not checked. [2018-09-10 12:40:16,500 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:40:18,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2350 backedges. 372 proven. 514 refuted. 0 times theorem prover too weak. 1464 trivial. 0 not checked. [2018-09-10 12:40:18,613 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:40:18,614 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [15, 5] total 20 [2018-09-10 12:40:18,614 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:40:18,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 12:40:18,615 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 12:40:18,616 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2018-09-10 12:40:18,616 INFO L87 Difference]: Start difference. First operand 91517 states and 96709 transitions. Second operand 5 states. [2018-09-10 12:40:23,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:40:23,788 INFO L93 Difference]: Finished difference Result 186608 states and 197187 transitions. [2018-09-10 12:40:23,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-10 12:40:23,788 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1460 [2018-09-10 12:40:23,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:40:23,935 INFO L225 Difference]: With dead ends: 186608 [2018-09-10 12:40:23,935 INFO L226 Difference]: Without dead ends: 95800 [2018-09-10 12:40:24,005 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2942 GetRequests, 2917 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2018-09-10 12:40:24,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95800 states. [2018-09-10 12:40:24,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95800 to 95081. [2018-09-10 12:40:24,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95081 states. [2018-09-10 12:40:25,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95081 states to 95081 states and 100410 transitions. [2018-09-10 12:40:25,561 INFO L78 Accepts]: Start accepts. Automaton has 95081 states and 100410 transitions. Word has length 1460 [2018-09-10 12:40:25,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:40:25,562 INFO L480 AbstractCegarLoop]: Abstraction has 95081 states and 100410 transitions. [2018-09-10 12:40:25,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 12:40:25,562 INFO L276 IsEmpty]: Start isEmpty. Operand 95081 states and 100410 transitions. [2018-09-10 12:40:25,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1801 [2018-09-10 12:40:25,639 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:40:25,640 INFO L376 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 12:40:25,641 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 12:40:25,641 INFO L82 PathProgramCache]: Analyzing trace with hash -364274324, now seen corresponding path program 1 times [2018-09-10 12:40:25,641 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:40:25,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:40:25,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:40:25,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:40:25,642 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:40:25,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:40:28,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3000 backedges. 959 proven. 324 refuted. 0 times theorem prover too weak. 1717 trivial. 0 not checked. [2018-09-10 12:40:28,123 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:40:28,123 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:40:28,132 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:40:28,133 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Received shutdown request... [2018-09-10 12:40:28,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:40:28,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:40:28,832 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-10 12:40:29,034 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:40:29,035 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-10 12:40:29,040 WARN L206 ceAbstractionStarter]: Timeout [2018-09-10 12:40:29,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 12:40:29 BoogieIcfgContainer [2018-09-10 12:40:29,040 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-10 12:40:29,041 INFO L168 Benchmark]: Toolchain (without parser) took 229187.28 ms. Allocated memory was 1.5 GB in the beginning and 3.9 GB in the end (delta: 2.4 GB). Free memory was 1.4 GB in the beginning and 2.6 GB in the end (delta: -1.1 GB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. [2018-09-10 12:40:29,042 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-10 12:40:29,042 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1827.93 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 179.7 MB). Peak memory consumption was 179.7 MB. Max. memory is 7.1 GB. [2018-09-10 12:40:29,043 INFO L168 Benchmark]: Boogie Procedure Inliner took 175.14 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-10 12:40:29,043 INFO L168 Benchmark]: Boogie Preprocessor took 641.94 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 872.4 MB). Free memory was 1.2 GB in the beginning and 2.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 85.7 MB. Max. memory is 7.1 GB. [2018-09-10 12:40:29,044 INFO L168 Benchmark]: RCFGBuilder took 7688.39 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 1.8 GB in the end (delta: 539.8 MB). Peak memory consumption was 539.8 MB. Max. memory is 7.1 GB. [2018-09-10 12:40:29,045 INFO L168 Benchmark]: TraceAbstraction took 218845.05 ms. Allocated memory was 2.4 GB in the beginning and 3.9 GB in the end (delta: 1.5 GB). Free memory was 1.8 GB in the beginning and 2.6 GB in the end (delta: -798.8 MB). Peak memory consumption was 748.3 MB. Max. memory is 7.1 GB. [2018-09-10 12:40:29,049 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1827.93 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 179.7 MB). Peak memory consumption was 179.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 175.14 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 641.94 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 872.4 MB). Free memory was 1.2 GB in the beginning and 2.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 85.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 7688.39 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 1.8 GB in the end (delta: 539.8 MB). Peak memory consumption was 539.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 218845.05 ms. Allocated memory was 2.4 GB in the beginning and 3.9 GB in the end (delta: 1.5 GB). Free memory was 1.8 GB in the beginning and 2.6 GB in the end (delta: -798.8 MB). Peak memory consumption was 748.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 195]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 195). Cancelled while BasicCegarLoop was analyzing trace of length 1801 with TraceHistMax 7, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 3 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 775 locations, 1 error locations. TIMEOUT Result, 218.7s OverallTime, 15 OverallIterations, 7 TraceHistogramMax, 157.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4567 SDtfs, 48307 SDslu, 2986 SDs, 0 SdLazy, 101826 SolverSat, 21847 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 120.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26867 GetRequests, 26588 SyntacticMatches, 35 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2095 ImplicationChecksByTransitivity, 11.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=126729occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 11.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 13834 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.7s SsaConstructionTime, 6.0s SatisfiabilityAnalysisTime, 28.7s InterpolantComputationTime, 22337 NumberOfCodeBlocks, 22337 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 35570 ConstructedInterpolants, 68 QuantifiedInterpolants, 87544251 SizeOfPredicates, 12 NumberOfNonLiveVariables, 17624 ConjunctsInSsa, 98 ConjunctsInUnsatCore, 44 InterpolantComputations, 11 PerfectInterpolantSequences, 36505/43136 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem18_label26_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-10_12-40-29-065.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem18_label26_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-10_12-40-29-065.csv Completed graceful shutdown