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/Problem12_label17_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-10 11:43:29,742 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-10 11:43:29,744 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-10 11:43:29,756 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-10 11:43:29,756 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-10 11:43:29,757 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-10 11:43:29,758 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-10 11:43:29,761 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-10 11:43:29,762 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-10 11:43:29,763 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-10 11:43:29,764 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-10 11:43:29,764 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-10 11:43:29,765 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-10 11:43:29,766 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-10 11:43:29,767 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-10 11:43:29,768 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-10 11:43:29,769 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-10 11:43:29,771 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-10 11:43:29,773 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-10 11:43:29,775 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-10 11:43:29,776 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-10 11:43:29,777 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-10 11:43:29,780 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-10 11:43:29,780 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-10 11:43:29,780 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-10 11:43:29,781 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-10 11:43:29,782 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-10 11:43:29,783 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-10 11:43:29,784 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-10 11:43:29,785 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-10 11:43:29,785 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-10 11:43:29,786 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-10 11:43:29,786 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-10 11:43:29,787 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-10 11:43:29,788 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-10 11:43:29,788 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-10 11:43:29,789 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 11:43:29,806 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-10 11:43:29,806 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-10 11:43:29,807 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-10 11:43:29,807 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-10 11:43:29,807 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-10 11:43:29,807 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-10 11:43:29,808 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-10 11:43:29,808 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-10 11:43:29,808 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-10 11:43:29,808 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-10 11:43:29,808 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-10 11:43:29,809 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-10 11:43:29,810 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-10 11:43:29,810 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-10 11:43:29,810 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-10 11:43:29,810 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-10 11:43:29,810 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-10 11:43:29,811 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-10 11:43:29,811 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-10 11:43:29,811 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-10 11:43:29,811 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-10 11:43:29,811 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-10 11:43:29,812 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-10 11:43:29,812 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 11:43:29,812 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-10 11:43:29,812 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-10 11:43:29,812 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-10 11:43:29,813 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-10 11:43:29,813 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-10 11:43:29,813 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-10 11:43:29,813 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-10 11:43:29,813 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-10 11:43:29,814 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-10 11:43:29,865 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-10 11:43:29,880 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-10 11:43:29,887 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-10 11:43:29,889 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-10 11:43:29,889 INFO L276 PluginConnector]: CDTParser initialized [2018-09-10 11:43:29,890 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label17_true-unreach-call.c [2018-09-10 11:43:30,284 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10b0a9edd/fcdfda72268341e1b26a4e9eaddf775b/FLAG2cbdecbf0 [2018-09-10 11:43:30,777 INFO L276 CDTParser]: Found 1 translation units. [2018-09-10 11:43:30,778 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label17_true-unreach-call.c [2018-09-10 11:43:30,816 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10b0a9edd/fcdfda72268341e1b26a4e9eaddf775b/FLAG2cbdecbf0 [2018-09-10 11:43:30,841 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10b0a9edd/fcdfda72268341e1b26a4e9eaddf775b [2018-09-10 11:43:30,855 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-10 11:43:30,859 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-10 11:43:30,860 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-10 11:43:30,861 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-10 11:43:30,872 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-10 11:43:30,873 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 11:43:30" (1/1) ... [2018-09-10 11:43:30,876 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66a95c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:43:30, skipping insertion in model container [2018-09-10 11:43:30,877 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 11:43:30" (1/1) ... [2018-09-10 11:43:31,252 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-10 11:43:32,305 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 11:43:32,324 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-10 11:43:32,936 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 11:43:33,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:43:33 WrapperNode [2018-09-10 11:43:33,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-10 11:43:33,206 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-10 11:43:33,206 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-10 11:43:33,206 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-10 11:43:33,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:43:33" (1/1) ... [2018-09-10 11:43:33,312 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:43:33" (1/1) ... [2018-09-10 11:43:33,468 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-10 11:43:33,468 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-10 11:43:33,468 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-10 11:43:33,469 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-10 11:43:34,049 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:43:33" (1/1) ... [2018-09-10 11:43:34,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:43:33" (1/1) ... [2018-09-10 11:43:34,091 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:43:33" (1/1) ... [2018-09-10 11:43:34,092 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:43:33" (1/1) ... [2018-09-10 11:43:34,218 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:43:33" (1/1) ... [2018-09-10 11:43:34,261 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:43:33" (1/1) ... [2018-09-10 11:43:34,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:43:33" (1/1) ... [2018-09-10 11:43:34,345 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-10 11:43:34,346 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-10 11:43:34,346 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-10 11:43:34,346 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-10 11:43:34,349 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:43:33" (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 11:43:34,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-10 11:43:34,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-10 11:43:34,420 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 11:43:34,420 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 11:43:34,421 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 11:43:34,421 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 11:43:34,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-10 11:43:34,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-10 11:43:34,421 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_output4 [2018-09-10 11:43:34,422 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_output4 [2018-09-10 11:43:34,422 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-10 11:43:34,422 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-10 11:43:34,422 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 11:43:34,422 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 11:43:44,134 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-10 11:43:44,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 11:43:44 BoogieIcfgContainer [2018-09-10 11:43:44,135 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-10 11:43:44,135 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-10 11:43:44,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-10 11:43:44,139 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-10 11:43:44,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 11:43:30" (1/3) ... [2018-09-10 11:43:44,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b236222 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 11:43:44, skipping insertion in model container [2018-09-10 11:43:44,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 11:43:33" (2/3) ... [2018-09-10 11:43:44,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b236222 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 11:43:44, skipping insertion in model container [2018-09-10 11:43:44,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 11:43:44" (3/3) ... [2018-09-10 11:43:44,143 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label17_true-unreach-call.c [2018-09-10 11:43:44,153 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-10 11:43:44,163 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-10 11:43:44,228 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-10 11:43:44,228 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-10 11:43:44,229 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-10 11:43:44,229 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-10 11:43:44,229 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-10 11:43:44,229 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-10 11:43:44,229 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-10 11:43:44,229 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-10 11:43:44,230 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-10 11:43:44,269 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states. [2018-09-10 11:43:44,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-10 11:43:44,278 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:43:44,280 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] [2018-09-10 11:43:44,281 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 11:43:44,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1220648879, now seen corresponding path program 1 times [2018-09-10 11:43:44,290 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:43:44,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:43:44,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:43:44,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:43:44,349 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:43:44,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:43:44,807 WARN L175 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 11:43:44,866 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 11:43:44,868 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 11:43:44,869 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-10 11:43:44,869 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 11:43:44,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 11:43:44,889 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 11:43:44,890 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 11:43:44,893 INFO L87 Difference]: Start difference. First operand 840 states. Second operand 3 states. [2018-09-10 11:43:52,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 11:43:52,231 INFO L93 Difference]: Finished difference Result 2446 states and 4700 transitions. [2018-09-10 11:43:52,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 11:43:52,233 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 47 [2018-09-10 11:43:52,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 11:43:52,267 INFO L225 Difference]: With dead ends: 2446 [2018-09-10 11:43:52,267 INFO L226 Difference]: Without dead ends: 1604 [2018-09-10 11:43:52,279 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 11:43:52,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2018-09-10 11:43:52,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1604. [2018-09-10 11:43:52,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1604 states. [2018-09-10 11:43:52,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 3014 transitions. [2018-09-10 11:43:52,448 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 3014 transitions. Word has length 47 [2018-09-10 11:43:52,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 11:43:52,449 INFO L480 AbstractCegarLoop]: Abstraction has 1604 states and 3014 transitions. [2018-09-10 11:43:52,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 11:43:52,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 3014 transitions. [2018-09-10 11:43:52,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-09-10 11:43:52,457 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:43:52,458 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:43:52,458 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 11:43:52,458 INFO L82 PathProgramCache]: Analyzing trace with hash 620620002, now seen corresponding path program 1 times [2018-09-10 11:43:52,459 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:43:52,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:43:52,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:43:52,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:43:52,461 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:43:52,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:43:52,717 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 11:43:52,718 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 11:43:52,718 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-10 11:43:52,718 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 11:43:52,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 11:43:52,721 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 11:43:52,721 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-09-10 11:43:52,721 INFO L87 Difference]: Start difference. First operand 1604 states and 3014 transitions. Second operand 5 states. [2018-09-10 11:44:06,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 11:44:06,934 INFO L93 Difference]: Finished difference Result 4873 states and 9168 transitions. [2018-09-10 11:44:06,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-10 11:44:06,937 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 117 [2018-09-10 11:44:06,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 11:44:06,959 INFO L225 Difference]: With dead ends: 4873 [2018-09-10 11:44:06,959 INFO L226 Difference]: Without dead ends: 3275 [2018-09-10 11:44:06,965 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-10 11:44:06,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3275 states. [2018-09-10 11:44:07,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3275 to 3241. [2018-09-10 11:44:07,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3241 states. [2018-09-10 11:44:07,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3241 states to 3241 states and 5443 transitions. [2018-09-10 11:44:07,096 INFO L78 Accepts]: Start accepts. Automaton has 3241 states and 5443 transitions. Word has length 117 [2018-09-10 11:44:07,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 11:44:07,097 INFO L480 AbstractCegarLoop]: Abstraction has 3241 states and 5443 transitions. [2018-09-10 11:44:07,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 11:44:07,097 INFO L276 IsEmpty]: Start isEmpty. Operand 3241 states and 5443 transitions. [2018-09-10 11:44:07,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-10 11:44:07,101 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:44:07,101 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:44:07,101 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 11:44:07,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1016371954, now seen corresponding path program 1 times [2018-09-10 11:44:07,102 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:44:07,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:44:07,103 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:44:07,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:44:07,103 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:44:07,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:44:07,367 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-10 11:44:07,367 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:44:07,368 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 11:44:07,381 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:44:07,382 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:44:07,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:44:07,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:44:07,642 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-10 11:44:07,642 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:44:08,315 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-10 11:44:08,345 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 11:44:08,345 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 7 [2018-09-10 11:44:08,345 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 11:44:08,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-10 11:44:08,347 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-10 11:44:08,347 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-09-10 11:44:08,347 INFO L87 Difference]: Start difference. First operand 3241 states and 5443 transitions. Second operand 4 states. [2018-09-10 11:44:16,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 11:44:16,681 INFO L93 Difference]: Finished difference Result 9656 states and 16530 transitions. [2018-09-10 11:44:16,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-10 11:44:16,682 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2018-09-10 11:44:16,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 11:44:16,730 INFO L225 Difference]: With dead ends: 9656 [2018-09-10 11:44:16,731 INFO L226 Difference]: Without dead ends: 6421 [2018-09-10 11:44:16,746 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 245 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-09-10 11:44:16,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6421 states. [2018-09-10 11:44:16,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6421 to 6421. [2018-09-10 11:44:16,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6421 states. [2018-09-10 11:44:16,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6421 states to 6421 states and 10107 transitions. [2018-09-10 11:44:16,952 INFO L78 Accepts]: Start accepts. Automaton has 6421 states and 10107 transitions. Word has length 123 [2018-09-10 11:44:16,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 11:44:16,953 INFO L480 AbstractCegarLoop]: Abstraction has 6421 states and 10107 transitions. [2018-09-10 11:44:16,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-10 11:44:16,953 INFO L276 IsEmpty]: Start isEmpty. Operand 6421 states and 10107 transitions. [2018-09-10 11:44:16,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-09-10 11:44:16,958 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:44:16,958 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:44:16,958 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 11:44:16,959 INFO L82 PathProgramCache]: Analyzing trace with hash 41697410, now seen corresponding path program 1 times [2018-09-10 11:44:16,959 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:44:16,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:44:16,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:44:16,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:44:16,960 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:44:17,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:44:17,305 WARN L175 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 11:44:17,386 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-10 11:44:17,386 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:44:17,386 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 11:44:17,394 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:44:17,395 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:44:17,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:44:17,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:44:17,539 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 11:44:17,540 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:44:17,620 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 11:44:17,774 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 11:44:17,775 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2018-09-10 11:44:17,775 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 11:44:17,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 11:44:17,776 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 11:44:17,776 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-09-10 11:44:17,776 INFO L87 Difference]: Start difference. First operand 6421 states and 10107 transitions. Second operand 3 states. [2018-09-10 11:44:24,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 11:44:24,606 INFO L93 Difference]: Finished difference Result 19077 states and 30898 transitions. [2018-09-10 11:44:24,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 11:44:24,607 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 197 [2018-09-10 11:44:24,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 11:44:24,694 INFO L225 Difference]: With dead ends: 19077 [2018-09-10 11:44:24,694 INFO L226 Difference]: Without dead ends: 12662 [2018-09-10 11:44:24,734 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 393 SyntacticMatches, 5 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-09-10 11:44:24,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12662 states. [2018-09-10 11:44:25,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12662 to 12662. [2018-09-10 11:44:25,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12662 states. [2018-09-10 11:44:25,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12662 states to 12662 states and 20031 transitions. [2018-09-10 11:44:25,118 INFO L78 Accepts]: Start accepts. Automaton has 12662 states and 20031 transitions. Word has length 197 [2018-09-10 11:44:25,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 11:44:25,119 INFO L480 AbstractCegarLoop]: Abstraction has 12662 states and 20031 transitions. [2018-09-10 11:44:25,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 11:44:25,119 INFO L276 IsEmpty]: Start isEmpty. Operand 12662 states and 20031 transitions. [2018-09-10 11:44:25,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-09-10 11:44:25,131 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:44:25,131 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:44:25,134 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 11:44:25,135 INFO L82 PathProgramCache]: Analyzing trace with hash 749480957, now seen corresponding path program 1 times [2018-09-10 11:44:25,135 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:44:25,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:44:25,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:44:25,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:44:25,138 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:44:25,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:44:25,592 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 11:44:25,592 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 11:44:25,592 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-10 11:44:25,593 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 11:44:25,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 11:44:25,594 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 11:44:25,594 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-10 11:44:25,594 INFO L87 Difference]: Start difference. First operand 12662 states and 20031 transitions. Second operand 5 states. [2018-09-10 11:44:47,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 11:44:47,542 INFO L93 Difference]: Finished difference Result 48133 states and 80429 transitions. [2018-09-10 11:44:47,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-10 11:44:47,543 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 230 [2018-09-10 11:44:47,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 11:44:47,673 INFO L225 Difference]: With dead ends: 48133 [2018-09-10 11:44:47,673 INFO L226 Difference]: Without dead ends: 35477 [2018-09-10 11:44:47,732 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-09-10 11:44:47,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35477 states. [2018-09-10 11:44:48,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35477 to 35268. [2018-09-10 11:44:48,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35268 states. [2018-09-10 11:44:48,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35268 states to 35268 states and 53735 transitions. [2018-09-10 11:44:48,599 INFO L78 Accepts]: Start accepts. Automaton has 35268 states and 53735 transitions. Word has length 230 [2018-09-10 11:44:48,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 11:44:48,600 INFO L480 AbstractCegarLoop]: Abstraction has 35268 states and 53735 transitions. [2018-09-10 11:44:48,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 11:44:48,600 INFO L276 IsEmpty]: Start isEmpty. Operand 35268 states and 53735 transitions. [2018-09-10 11:44:48,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2018-09-10 11:44:48,620 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:44:48,620 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 11:44:48,620 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 11:44:48,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1743110525, now seen corresponding path program 1 times [2018-09-10 11:44:48,621 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:44:48,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:44:48,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:44:48,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:44:48,622 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:44:48,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:44:48,891 WARN L175 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 11:44:49,303 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 80 proven. 90 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 11:44:49,303 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:44:49,303 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 11:44:49,319 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:44:49,319 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:44:49,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:44:49,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:44:49,872 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2018-09-10 11:44:49,873 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:44:50,158 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 80 proven. 90 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 11:44:50,190 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 11:44:50,191 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-10 11:44:50,191 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 11:44:50,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 11:44:50,192 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 11:44:50,192 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-10 11:44:50,192 INFO L87 Difference]: Start difference. First operand 35268 states and 53735 transitions. Second operand 5 states. [2018-09-10 11:45:00,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 11:45:00,014 INFO L93 Difference]: Finished difference Result 78430 states and 123716 transitions. [2018-09-10 11:45:00,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-10 11:45:00,023 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 263 [2018-09-10 11:45:00,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 11:45:00,158 INFO L225 Difference]: With dead ends: 78430 [2018-09-10 11:45:00,158 INFO L226 Difference]: Without dead ends: 43168 [2018-09-10 11:45:00,238 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 521 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-09-10 11:45:00,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43168 states. [2018-09-10 11:45:00,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43168 to 42852. [2018-09-10 11:45:00,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42852 states. [2018-09-10 11:45:01,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42852 states to 42852 states and 54508 transitions. [2018-09-10 11:45:01,030 INFO L78 Accepts]: Start accepts. Automaton has 42852 states and 54508 transitions. Word has length 263 [2018-09-10 11:45:01,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 11:45:01,030 INFO L480 AbstractCegarLoop]: Abstraction has 42852 states and 54508 transitions. [2018-09-10 11:45:01,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 11:45:01,031 INFO L276 IsEmpty]: Start isEmpty. Operand 42852 states and 54508 transitions. [2018-09-10 11:45:01,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2018-09-10 11:45:01,045 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:45:01,045 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 11:45:01,045 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 11:45:01,046 INFO L82 PathProgramCache]: Analyzing trace with hash 304481442, now seen corresponding path program 1 times [2018-09-10 11:45:01,046 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:45:01,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:45:01,047 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:45:01,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:45:01,047 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:45:01,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:45:01,341 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 176 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 11:45:01,342 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:45:01,342 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 11:45:01,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:45:01,352 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:45:01,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:45:01,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:45:01,648 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 176 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 11:45:01,648 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:45:02,168 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 176 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 11:45:02,190 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:45:02,190 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 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 11:45:02,210 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:45:02,210 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:45:02,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:45:02,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:45:02,547 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 176 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 11:45:02,547 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:45:02,836 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 176 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 11:45:02,839 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 11:45:02,839 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 15 [2018-09-10 11:45:02,839 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 11:45:02,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 11:45:02,841 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 11:45:02,841 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-09-10 11:45:02,842 INFO L87 Difference]: Start difference. First operand 42852 states and 54508 transitions. Second operand 9 states. [2018-09-10 11:45:17,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 11:45:17,368 INFO L93 Difference]: Finished difference Result 104966 states and 143107 transitions. [2018-09-10 11:45:17,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-10 11:45:17,377 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 294 [2018-09-10 11:45:17,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 11:45:17,560 INFO L225 Difference]: With dead ends: 104966 [2018-09-10 11:45:17,560 INFO L226 Difference]: Without dead ends: 62120 [2018-09-10 11:45:17,647 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1188 GetRequests, 1168 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2018-09-10 11:45:17,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62120 states. [2018-09-10 11:45:18,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62120 to 61235. [2018-09-10 11:45:18,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61235 states. [2018-09-10 11:45:18,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61235 states to 61235 states and 81404 transitions. [2018-09-10 11:45:18,674 INFO L78 Accepts]: Start accepts. Automaton has 61235 states and 81404 transitions. Word has length 294 [2018-09-10 11:45:18,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 11:45:18,674 INFO L480 AbstractCegarLoop]: Abstraction has 61235 states and 81404 transitions. [2018-09-10 11:45:18,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 11:45:18,675 INFO L276 IsEmpty]: Start isEmpty. Operand 61235 states and 81404 transitions. [2018-09-10 11:45:18,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-09-10 11:45:18,688 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:45:18,688 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 11:45:18,689 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 11:45:18,689 INFO L82 PathProgramCache]: Analyzing trace with hash -485270678, now seen corresponding path program 1 times [2018-09-10 11:45:18,689 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:45:18,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:45:18,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:45:18,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:45:18,691 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:45:18,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:45:19,059 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 139 proven. 38 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 11:45:19,059 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:45:19,060 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 11:45:19,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:45:19,068 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:45:19,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:45:19,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:45:19,583 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-09-10 11:45:19,583 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:45:19,684 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-09-10 11:45:19,705 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 11:45:19,705 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 6 [2018-09-10 11:45:19,705 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 11:45:19,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 11:45:19,706 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 11:45:19,706 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-10 11:45:19,706 INFO L87 Difference]: Start difference. First operand 61235 states and 81404 transitions. Second operand 3 states. [2018-09-10 11:45:26,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 11:45:26,440 INFO L93 Difference]: Finished difference Result 176034 states and 241352 transitions. [2018-09-10 11:45:26,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 11:45:26,441 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 298 [2018-09-10 11:45:26,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 11:45:26,844 INFO L225 Difference]: With dead ends: 176034 [2018-09-10 11:45:26,844 INFO L226 Difference]: Without dead ends: 114805 [2018-09-10 11:45:27,047 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 596 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-10 11:45:27,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114805 states. [2018-09-10 11:45:29,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114805 to 114802. [2018-09-10 11:45:29,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114802 states. [2018-09-10 11:45:29,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114802 states to 114802 states and 145223 transitions. [2018-09-10 11:45:29,468 INFO L78 Accepts]: Start accepts. Automaton has 114802 states and 145223 transitions. Word has length 298 [2018-09-10 11:45:29,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 11:45:29,468 INFO L480 AbstractCegarLoop]: Abstraction has 114802 states and 145223 transitions. [2018-09-10 11:45:29,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 11:45:29,469 INFO L276 IsEmpty]: Start isEmpty. Operand 114802 states and 145223 transitions. [2018-09-10 11:45:29,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2018-09-10 11:45:29,501 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:45:29,501 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:45:29,502 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 11:45:29,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1197038092, now seen corresponding path program 1 times [2018-09-10 11:45:29,502 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:45:29,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:45:29,503 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:45:29,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:45:29,503 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:45:29,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:45:29,829 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 290 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-09-10 11:45:29,829 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:45:29,830 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 11:45:29,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:45:29,840 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:45:29,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:45:29,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:45:30,473 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 290 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-09-10 11:45:30,474 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:45:30,627 WARN L175 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-10 11:45:31,346 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 290 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-09-10 11:45:31,367 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:45:31,367 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 11:45:31,385 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:45:31,385 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:45:31,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:45:31,692 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:45:31,760 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 290 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-09-10 11:45:31,761 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:45:31,950 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 290 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-09-10 11:45:31,952 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 11:45:31,953 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-09-10 11:45:31,953 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 11:45:31,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 11:45:31,955 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 11:45:31,955 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-10 11:45:31,955 INFO L87 Difference]: Start difference. First operand 114802 states and 145223 transitions. Second operand 9 states. [2018-09-10 11:45:50,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 11:45:50,765 INFO L93 Difference]: Finished difference Result 314297 states and 438238 transitions. [2018-09-10 11:45:50,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-10 11:45:50,766 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 365 [2018-09-10 11:45:50,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 11:45:51,378 INFO L225 Difference]: With dead ends: 314297 [2018-09-10 11:45:51,378 INFO L226 Difference]: Without dead ends: 186522 [2018-09-10 11:45:51,663 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1478 GetRequests, 1456 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2018-09-10 11:45:51,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186522 states. [2018-09-10 11:45:55,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186522 to 177524. [2018-09-10 11:45:55,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177524 states. [2018-09-10 11:45:55,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177524 states to 177524 states and 231817 transitions. [2018-09-10 11:45:55,722 INFO L78 Accepts]: Start accepts. Automaton has 177524 states and 231817 transitions. Word has length 365 [2018-09-10 11:45:55,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 11:45:55,723 INFO L480 AbstractCegarLoop]: Abstraction has 177524 states and 231817 transitions. [2018-09-10 11:45:55,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 11:45:55,723 INFO L276 IsEmpty]: Start isEmpty. Operand 177524 states and 231817 transitions. [2018-09-10 11:45:55,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2018-09-10 11:45:55,788 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:45:55,788 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:45:55,789 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 11:45:55,789 INFO L82 PathProgramCache]: Analyzing trace with hash 2016092092, now seen corresponding path program 1 times [2018-09-10 11:45:55,789 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:45:55,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:45:55,790 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:45:55,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:45:55,790 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:45:55,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:45:56,195 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2018-09-10 11:45:56,196 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 11:45:56,196 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-10 11:45:56,196 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 11:45:56,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 11:45:56,197 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 11:45:56,197 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 11:45:56,198 INFO L87 Difference]: Start difference. First operand 177524 states and 231817 transitions. Second operand 3 states. [2018-09-10 11:46:05,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 11:46:05,604 INFO L93 Difference]: Finished difference Result 383905 states and 507738 transitions. [2018-09-10 11:46:05,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 11:46:05,604 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 469 [2018-09-10 11:46:05,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 11:46:06,333 INFO L225 Difference]: With dead ends: 383905 [2018-09-10 11:46:06,333 INFO L226 Difference]: Without dead ends: 207155 [2018-09-10 11:46:06,740 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 11:46:06,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207155 states. [2018-09-10 11:46:18,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207155 to 201712. [2018-09-10 11:46:18,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201712 states. [2018-09-10 11:46:19,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201712 states to 201712 states and 258646 transitions. [2018-09-10 11:46:19,129 INFO L78 Accepts]: Start accepts. Automaton has 201712 states and 258646 transitions. Word has length 469 [2018-09-10 11:46:19,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 11:46:19,130 INFO L480 AbstractCegarLoop]: Abstraction has 201712 states and 258646 transitions. [2018-09-10 11:46:19,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 11:46:19,130 INFO L276 IsEmpty]: Start isEmpty. Operand 201712 states and 258646 transitions. [2018-09-10 11:46:19,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1212 [2018-09-10 11:46:19,572 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 11:46:19,573 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:46:19,573 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 11:46:19,574 INFO L82 PathProgramCache]: Analyzing trace with hash -296697173, now seen corresponding path program 1 times [2018-09-10 11:46:19,574 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 11:46:19,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:46:19,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:46:19,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 11:46:19,575 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 11:46:19,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:46:20,806 WARN L175 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 9 [2018-09-10 11:46:21,131 WARN L175 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2018-09-10 11:46:25,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1059 backedges. 595 proven. 43 refuted. 0 times theorem prover too weak. 421 trivial. 0 not checked. [2018-09-10 11:46:25,353 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:46:25,353 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 11:46:25,362 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:46:25,362 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:46:25,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:46:25,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:46:26,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1059 backedges. 636 proven. 2 refuted. 0 times theorem prover too weak. 421 trivial. 0 not checked. [2018-09-10 11:46:26,687 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:46:28,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1059 backedges. 636 proven. 2 refuted. 0 times theorem prover too weak. 421 trivial. 0 not checked. [2018-09-10 11:46:28,738 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 11:46:28,738 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 11:46:28,755 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 11:46:28,755 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 11:46:29,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 11:46:29,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 11:46:30,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1059 backedges. 636 proven. 2 refuted. 0 times theorem prover too weak. 421 trivial. 0 not checked. [2018-09-10 11:46:30,625 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 11:46:33,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1059 backedges. 636 proven. 2 refuted. 0 times theorem prover too weak. 421 trivial. 0 not checked. [2018-09-10 11:46:33,257 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 11:46:33,257 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 6, 5, 5] total 25 [2018-09-10 11:46:33,258 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 11:46:33,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-10 11:46:33,260 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-10 11:46:33,260 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2018-09-10 11:46:33,260 INFO L87 Difference]: Start difference. First operand 201712 states and 258646 transitions. Second operand 18 states. [2018-09-10 11:46:37,120 WARN L175 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2018-09-10 11:46:40,479 WARN L175 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2018-09-10 11:47:09,842 WARN L175 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 Received shutdown request... [2018-09-10 11:47:19,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-10 11:47:19,342 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-10 11:47:19,348 WARN L206 ceAbstractionStarter]: Timeout [2018-09-10 11:47:19,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 11:47:19 BoogieIcfgContainer [2018-09-10 11:47:19,348 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-10 11:47:19,349 INFO L168 Benchmark]: Toolchain (without parser) took 228493.65 ms. Allocated memory was 1.5 GB in the beginning and 5.3 GB in the end (delta: 3.7 GB). Free memory was 1.4 GB in the beginning and 2.5 GB in the end (delta: -1.1 GB). Peak memory consumption was 2.7 GB. Max. memory is 7.1 GB. [2018-09-10 11:47:19,350 INFO L168 Benchmark]: CDTParser took 0.20 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 11:47:19,351 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2345.15 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: 256.3 MB). Peak memory consumption was 256.3 MB. Max. memory is 7.1 GB. [2018-09-10 11:47:19,352 INFO L168 Benchmark]: Boogie Procedure Inliner took 261.97 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. [2018-09-10 11:47:19,353 INFO L168 Benchmark]: Boogie Preprocessor took 877.42 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 917.5 MB). Free memory was 1.1 GB in the beginning and 2.3 GB in the end (delta: -1.2 GB). Peak memory consumption was 128.0 MB. Max. memory is 7.1 GB. [2018-09-10 11:47:19,354 INFO L168 Benchmark]: RCFGBuilder took 9788.55 ms. Allocated memory was 2.4 GB in the beginning and 2.6 GB in the end (delta: 160.4 MB). Free memory was 2.3 GB in the beginning and 2.4 GB in the end (delta: -142.8 MB). Peak memory consumption was 727.5 MB. Max. memory is 7.1 GB. [2018-09-10 11:47:19,355 INFO L168 Benchmark]: TraceAbstraction took 215212.96 ms. Allocated memory was 2.6 GB in the beginning and 5.3 GB in the end (delta: 2.7 GB). Free memory was 2.4 GB in the beginning and 2.5 GB in the end (delta: -26.3 MB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. [2018-09-10 11:47:19,360 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 2345.15 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: 256.3 MB). Peak memory consumption was 256.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 261.97 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 877.42 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 917.5 MB). Free memory was 1.1 GB in the beginning and 2.3 GB in the end (delta: -1.2 GB). Peak memory consumption was 128.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 9788.55 ms. Allocated memory was 2.4 GB in the beginning and 2.6 GB in the end (delta: 160.4 MB). Free memory was 2.3 GB in the beginning and 2.4 GB in the end (delta: -142.8 MB). Peak memory consumption was 727.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 215212.96 ms. Allocated memory was 2.6 GB in the beginning and 5.3 GB in the end (delta: 2.7 GB). Free memory was 2.4 GB in the beginning and 2.5 GB in the end (delta: -26.3 MB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 132]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 132). Cancelled while BasicCegarLoop was constructing difference of abstraction (201712states) and FLOYD_HOARE automaton (currently 61 states, 18 states before enhancement), while ReachableStatesComputation was computing reachable states (274293 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 840 locations, 1 error locations. TIMEOUT Result, 215.1s OverallTime, 11 OverallIterations, 5 TraceHistogramMax, 167.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4555 SDtfs, 35615 SDslu, 2568 SDs, 0 SdLazy, 82258 SolverSat, 17433 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 129.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9436 GetRequests, 9262 SyntacticMatches, 30 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 8.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=201712occurred in iteration=10, 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: 22.4s AutomataMinimizationTime, 10 MinimizatonAttempts, 15888 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 2.7s SatisfiabilityAnalysisTime, 16.2s InterpolantComputationTime, 8235 NumberOfCodeBlocks, 8235 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 12825 ConstructedInterpolants, 0 QuantifiedInterpolants, 52116654 SizeOfPredicates, 8 NumberOfNonLiveVariables, 7015 ConjunctsInSsa, 69 ConjunctsInUnsatCore, 31 InterpolantComputations, 10 PerfectInterpolantSequences, 9453/9850 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/Problem12_label17_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-10_11-47-19-374.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem12_label17_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-10_11-47-19-374.csv Completed graceful shutdown