java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/systemc/token_ring.02.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 17:14:27,546 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 17:14:27,549 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 17:14:27,567 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 17:14:27,568 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 17:14:27,570 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 17:14:27,572 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 17:14:27,576 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 17:14:27,578 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 17:14:27,579 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 17:14:27,580 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 17:14:27,581 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-07 17:14:27,585 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 17:14:27,586 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 17:14:27,587 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 17:14:27,588 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 17:14:27,589 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 17:14:27,589 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 17:14:27,591 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 17:14:27,593 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 17:14:27,594 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 17:14:27,595 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 17:14:27,596 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 17:14:27,597 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 17:14:27,599 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-07 17:14:27,599 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-07 17:14:27,599 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-07 17:14:27,600 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-07 17:14:27,600 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-07 17:14:27,601 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-07 17:14:27,602 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-07 17:14:27,602 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-07 17:14:27,603 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-07 17:14:27,604 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-07 17:14:27,605 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-07 17:14:27,605 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-07 17:14:27,605 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-07 17:14:27,606 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-07 17:14:27,606 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 17:14:27,607 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 17:14:27,607 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 17:14:27,608 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-07 17:14:27,622 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 17:14:27,623 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 17:14:27,624 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 17:14:27,624 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 17:14:27,624 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 17:14:27,625 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 17:14:27,625 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 17:14:27,625 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 17:14:27,625 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 17:14:27,625 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 17:14:27,626 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 17:14:27,626 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 17:14:27,626 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 17:14:27,626 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 17:14:27,626 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 17:14:27,626 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 17:14:27,627 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 17:14:27,627 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 17:14:27,627 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 17:14:27,627 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 17:14:27,627 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 17:14:27,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 17:14:27,628 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 17:14:27,628 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 17:14:27,628 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 17:14:27,628 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 17:14:27,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 17:14:27,629 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 17:14:27,629 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-07 17:14:27,909 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 17:14:27,923 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 17:14:27,927 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 17:14:27,928 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 17:14:27,929 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 17:14:27,929 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/token_ring.02.cil-2.c [2019-10-07 17:14:28,005 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/833f368a8/b934976be3f24c83bb0cb63250c9ca6e/FLAGd47f286c3 [2019-10-07 17:14:28,521 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 17:14:28,523 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/token_ring.02.cil-2.c [2019-10-07 17:14:28,535 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/833f368a8/b934976be3f24c83bb0cb63250c9ca6e/FLAGd47f286c3 [2019-10-07 17:14:28,880 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/833f368a8/b934976be3f24c83bb0cb63250c9ca6e [2019-10-07 17:14:28,890 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 17:14:28,892 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 17:14:28,894 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 17:14:28,894 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 17:14:28,897 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 17:14:28,898 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 05:14:28" (1/1) ... [2019-10-07 17:14:28,903 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e9b8ec1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:28, skipping insertion in model container [2019-10-07 17:14:28,903 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 05:14:28" (1/1) ... [2019-10-07 17:14:28,911 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 17:14:28,966 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 17:14:29,222 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 17:14:29,228 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 17:14:29,387 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 17:14:29,411 INFO L192 MainTranslator]: Completed translation [2019-10-07 17:14:29,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:29 WrapperNode [2019-10-07 17:14:29,411 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 17:14:29,412 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 17:14:29,412 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 17:14:29,412 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 17:14:29,423 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:29" (1/1) ... [2019-10-07 17:14:29,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:29" (1/1) ... [2019-10-07 17:14:29,431 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:29" (1/1) ... [2019-10-07 17:14:29,431 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:29" (1/1) ... [2019-10-07 17:14:29,441 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:29" (1/1) ... [2019-10-07 17:14:29,454 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:29" (1/1) ... [2019-10-07 17:14:29,456 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:29" (1/1) ... [2019-10-07 17:14:29,460 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 17:14:29,461 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 17:14:29,461 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 17:14:29,461 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 17:14:29,462 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:29" (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 [2019-10-07 17:14:29,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 17:14:29,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 17:14:29,516 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2019-10-07 17:14:29,516 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2019-10-07 17:14:29,516 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2019-10-07 17:14:29,517 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2019-10-07 17:14:29,517 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2019-10-07 17:14:29,517 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2019-10-07 17:14:29,518 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2019-10-07 17:14:29,518 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2019-10-07 17:14:29,518 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2019-10-07 17:14:29,518 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2019-10-07 17:14:29,518 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-10-07 17:14:29,518 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2019-10-07 17:14:29,519 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2019-10-07 17:14:29,519 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2019-10-07 17:14:29,519 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2019-10-07 17:14:29,519 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2019-10-07 17:14:29,519 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2019-10-07 17:14:29,519 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2019-10-07 17:14:29,520 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2019-10-07 17:14:29,520 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2019-10-07 17:14:29,520 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 17:14:29,520 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 17:14:29,520 INFO L130 BoogieDeclarations]: Found specification of procedure error [2019-10-07 17:14:29,521 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2019-10-07 17:14:29,521 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2019-10-07 17:14:29,521 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2019-10-07 17:14:29,521 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2019-10-07 17:14:29,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 17:14:29,521 INFO L130 BoogieDeclarations]: Found specification of procedure master [2019-10-07 17:14:29,522 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2019-10-07 17:14:29,522 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2019-10-07 17:14:29,522 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2019-10-07 17:14:29,522 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2019-10-07 17:14:29,522 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2019-10-07 17:14:29,522 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-10-07 17:14:29,523 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2019-10-07 17:14:29,523 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2019-10-07 17:14:29,523 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2019-10-07 17:14:29,523 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2019-10-07 17:14:29,523 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2019-10-07 17:14:29,523 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2019-10-07 17:14:29,524 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2019-10-07 17:14:29,524 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2019-10-07 17:14:29,524 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 17:14:29,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 17:14:29,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 17:14:30,509 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 17:14:30,509 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-07 17:14:30,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 05:14:30 BoogieIcfgContainer [2019-10-07 17:14:30,511 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 17:14:30,513 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 17:14:30,513 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 17:14:30,516 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 17:14:30,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 05:14:28" (1/3) ... [2019-10-07 17:14:30,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a180e0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 05:14:30, skipping insertion in model container [2019-10-07 17:14:30,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:29" (2/3) ... [2019-10-07 17:14:30,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a180e0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 05:14:30, skipping insertion in model container [2019-10-07 17:14:30,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 05:14:30" (3/3) ... [2019-10-07 17:14:30,520 INFO L109 eAbstractionObserver]: Analyzing ICFG token_ring.02.cil-2.c [2019-10-07 17:14:30,531 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 17:14:30,541 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 17:14:30,555 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 17:14:30,586 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 17:14:30,586 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 17:14:30,586 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 17:14:30,586 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 17:14:30,590 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 17:14:30,591 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 17:14:30,591 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 17:14:30,591 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 17:14:30,615 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states. [2019-10-07 17:14:30,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-10-07 17:14:30,625 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:14:30,626 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:14:30,628 INFO L410 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:14:30,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:14:30,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1027832444, now seen corresponding path program 1 times [2019-10-07 17:14:30,645 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:14:30,645 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:30,645 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:30,646 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:30,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:14:30,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:31,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 17:14:31,040 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:31,040 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:14:31,041 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 17:14:31,045 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:14:31,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:14:31,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-07 17:14:31,063 INFO L87 Difference]: Start difference. First operand 130 states. Second operand 4 states. [2019-10-07 17:14:31,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:14:31,481 INFO L93 Difference]: Finished difference Result 344 states and 471 transitions. [2019-10-07 17:14:31,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:14:31,483 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2019-10-07 17:14:31,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:14:31,499 INFO L225 Difference]: With dead ends: 344 [2019-10-07 17:14:31,499 INFO L226 Difference]: Without dead ends: 218 [2019-10-07 17:14:31,504 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-07 17:14:31,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-10-07 17:14:31,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2019-10-07 17:14:31,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-10-07 17:14:31,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 272 transitions. [2019-10-07 17:14:31,584 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 272 transitions. Word has length 64 [2019-10-07 17:14:31,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:14:31,585 INFO L462 AbstractCegarLoop]: Abstraction has 217 states and 272 transitions. [2019-10-07 17:14:31,585 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:14:31,585 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 272 transitions. [2019-10-07 17:14:31,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-07 17:14:31,591 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:14:31,592 INFO L385 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:14:31,592 INFO L410 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:14:31,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:14:31,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1647916486, now seen corresponding path program 1 times [2019-10-07 17:14:31,593 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:14:31,593 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:31,593 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:31,594 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:31,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:14:31,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:31,753 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-07 17:14:31,754 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:31,754 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:14:31,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:31,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:31,929 INFO L256 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-07 17:14:31,941 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:14:32,014 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-07 17:14:32,014 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:14:32,176 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-07 17:14:32,177 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 17:14:32,177 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2019-10-07 17:14:32,181 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:14:32,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:14:32,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-07 17:14:32,182 INFO L87 Difference]: Start difference. First operand 217 states and 272 transitions. Second operand 4 states. [2019-10-07 17:14:32,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:14:32,308 INFO L93 Difference]: Finished difference Result 386 states and 490 transitions. [2019-10-07 17:14:32,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:14:32,313 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 108 [2019-10-07 17:14:32,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:14:32,324 INFO L225 Difference]: With dead ends: 386 [2019-10-07 17:14:32,325 INFO L226 Difference]: Without dead ends: 280 [2019-10-07 17:14:32,327 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 215 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-07 17:14:32,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2019-10-07 17:14:32,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 238. [2019-10-07 17:14:32,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2019-10-07 17:14:32,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 304 transitions. [2019-10-07 17:14:32,395 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 304 transitions. Word has length 108 [2019-10-07 17:14:32,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:14:32,398 INFO L462 AbstractCegarLoop]: Abstraction has 238 states and 304 transitions. [2019-10-07 17:14:32,398 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:14:32,399 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 304 transitions. [2019-10-07 17:14:32,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-07 17:14:32,405 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:14:32,406 INFO L385 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:14:32,614 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:32,615 INFO L410 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:14:32,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:14:32,615 INFO L82 PathProgramCache]: Analyzing trace with hash 222884582, now seen corresponding path program 1 times [2019-10-07 17:14:32,616 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:14:32,616 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:32,616 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:32,617 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:32,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:14:32,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:32,766 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-10-07 17:14:32,767 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:32,767 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:14:32,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:32,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:32,942 INFO L256 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-07 17:14:32,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:14:33,023 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-07 17:14:33,023 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:14:33,227 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-10-07 17:14:33,227 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 17:14:33,228 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2019-10-07 17:14:33,228 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 17:14:33,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 17:14:33,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-07 17:14:33,229 INFO L87 Difference]: Start difference. First operand 238 states and 304 transitions. Second operand 3 states. [2019-10-07 17:14:33,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:14:33,283 INFO L93 Difference]: Finished difference Result 672 states and 888 transitions. [2019-10-07 17:14:33,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 17:14:33,283 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 142 [2019-10-07 17:14:33,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:14:33,288 INFO L225 Difference]: With dead ends: 672 [2019-10-07 17:14:33,288 INFO L226 Difference]: Without dead ends: 450 [2019-10-07 17:14:33,290 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 277 SyntacticMatches, 8 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-07 17:14:33,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2019-10-07 17:14:33,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 443. [2019-10-07 17:14:33,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2019-10-07 17:14:33,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 568 transitions. [2019-10-07 17:14:33,336 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 568 transitions. Word has length 142 [2019-10-07 17:14:33,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:14:33,337 INFO L462 AbstractCegarLoop]: Abstraction has 443 states and 568 transitions. [2019-10-07 17:14:33,337 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 17:14:33,338 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 568 transitions. [2019-10-07 17:14:33,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-07 17:14:33,345 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:14:33,345 INFO L385 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:14:33,550 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:33,551 INFO L410 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:14:33,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:14:33,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1481257174, now seen corresponding path program 1 times [2019-10-07 17:14:33,552 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:14:33,552 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:33,553 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:33,553 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:33,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:14:33,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:33,741 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2019-10-07 17:14:33,742 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:33,742 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:14:33,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:33,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:33,897 INFO L256 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-07 17:14:33,901 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:14:33,929 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-07 17:14:33,930 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:14:34,089 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-10-07 17:14:34,090 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 17:14:34,090 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 7 [2019-10-07 17:14:34,091 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:14:34,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:14:34,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-07 17:14:34,092 INFO L87 Difference]: Start difference. First operand 443 states and 568 transitions. Second operand 4 states. [2019-10-07 17:14:34,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:14:34,381 INFO L93 Difference]: Finished difference Result 1276 states and 1742 transitions. [2019-10-07 17:14:34,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:14:34,382 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 142 [2019-10-07 17:14:34,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:14:34,389 INFO L225 Difference]: With dead ends: 1276 [2019-10-07 17:14:34,389 INFO L226 Difference]: Without dead ends: 849 [2019-10-07 17:14:34,392 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-07 17:14:34,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2019-10-07 17:14:34,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 835. [2019-10-07 17:14:34,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 835 states. [2019-10-07 17:14:34,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 1057 transitions. [2019-10-07 17:14:34,466 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 1057 transitions. Word has length 142 [2019-10-07 17:14:34,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:14:34,467 INFO L462 AbstractCegarLoop]: Abstraction has 835 states and 1057 transitions. [2019-10-07 17:14:34,467 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:14:34,467 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 1057 transitions. [2019-10-07 17:14:34,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-07 17:14:34,473 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:14:34,473 INFO L385 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:14:34,678 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:34,679 INFO L410 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:14:34,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:14:34,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1555232879, now seen corresponding path program 1 times [2019-10-07 17:14:34,679 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:14:34,680 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:34,680 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:34,680 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:34,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:14:34,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:34,896 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-10-07 17:14:34,896 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:34,897 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:14:34,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:35,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:35,062 INFO L256 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-07 17:14:35,067 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:14:35,135 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-07 17:14:35,136 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:14:35,320 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-07 17:14:35,321 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 17:14:35,321 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [8] total 10 [2019-10-07 17:14:35,331 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:14:35,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:14:35,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-07 17:14:35,333 INFO L87 Difference]: Start difference. First operand 835 states and 1057 transitions. Second operand 4 states. [2019-10-07 17:14:35,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:14:35,522 INFO L93 Difference]: Finished difference Result 1465 states and 1845 transitions. [2019-10-07 17:14:35,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:14:35,523 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 156 [2019-10-07 17:14:35,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:14:35,532 INFO L225 Difference]: With dead ends: 1465 [2019-10-07 17:14:35,532 INFO L226 Difference]: Without dead ends: 1049 [2019-10-07 17:14:35,535 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 305 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-07 17:14:35,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2019-10-07 17:14:35,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 1049. [2019-10-07 17:14:35,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1049 states. [2019-10-07 17:14:35,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1275 transitions. [2019-10-07 17:14:35,605 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1275 transitions. Word has length 156 [2019-10-07 17:14:35,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:14:35,607 INFO L462 AbstractCegarLoop]: Abstraction has 1049 states and 1275 transitions. [2019-10-07 17:14:35,608 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:14:35,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1275 transitions. [2019-10-07 17:14:35,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-10-07 17:14:35,616 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:14:35,616 INFO L385 BasicCegarLoop]: trace histogram [6, 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, 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] [2019-10-07 17:14:35,823 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:35,824 INFO L410 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:14:35,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:14:35,825 INFO L82 PathProgramCache]: Analyzing trace with hash 649083913, now seen corresponding path program 1 times [2019-10-07 17:14:35,825 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:14:35,825 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:35,825 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:35,826 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:35,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:14:35,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:35,997 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 42 proven. 23 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-10-07 17:14:35,997 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:35,998 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:14:35,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:36,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:36,204 INFO L256 TraceCheckSpWp]: Trace formula consists of 1105 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-07 17:14:36,213 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:14:36,305 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-07 17:14:36,306 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:14:36,629 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 43 proven. 6 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2019-10-07 17:14:36,629 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 17:14:36,630 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 4] total 12 [2019-10-07 17:14:36,630 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 17:14:36,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 17:14:36,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2019-10-07 17:14:36,631 INFO L87 Difference]: Start difference. First operand 1049 states and 1275 transitions. Second operand 6 states. [2019-10-07 17:14:37,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:14:37,079 INFO L93 Difference]: Finished difference Result 1698 states and 2107 transitions. [2019-10-07 17:14:37,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 17:14:37,080 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 216 [2019-10-07 17:14:37,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:14:37,089 INFO L225 Difference]: With dead ends: 1698 [2019-10-07 17:14:37,090 INFO L226 Difference]: Without dead ends: 1163 [2019-10-07 17:14:37,093 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 434 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2019-10-07 17:14:37,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2019-10-07 17:14:37,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1163. [2019-10-07 17:14:37,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1163 states. [2019-10-07 17:14:37,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 1377 transitions. [2019-10-07 17:14:37,174 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 1377 transitions. Word has length 216 [2019-10-07 17:14:37,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:14:37,176 INFO L462 AbstractCegarLoop]: Abstraction has 1163 states and 1377 transitions. [2019-10-07 17:14:37,176 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 17:14:37,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 1377 transitions. [2019-10-07 17:14:37,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-07 17:14:37,182 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:14:37,182 INFO L385 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, 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] [2019-10-07 17:14:37,387 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:37,388 INFO L410 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:14:37,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:14:37,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1030054453, now seen corresponding path program 1 times [2019-10-07 17:14:37,389 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:14:37,389 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:37,389 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:37,390 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:37,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:14:37,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:37,498 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-10-07 17:14:37,499 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:37,499 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:14:37,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:37,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:37,823 INFO L256 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-07 17:14:37,829 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:14:37,858 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-07 17:14:37,858 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:14:38,008 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-07 17:14:38,008 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 17:14:38,008 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2019-10-07 17:14:38,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 17:14:38,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 17:14:38,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-07 17:14:38,010 INFO L87 Difference]: Start difference. First operand 1163 states and 1377 transitions. Second operand 3 states. [2019-10-07 17:14:38,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:14:38,083 INFO L93 Difference]: Finished difference Result 1765 states and 2154 transitions. [2019-10-07 17:14:38,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 17:14:38,084 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 156 [2019-10-07 17:14:38,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:14:38,092 INFO L225 Difference]: With dead ends: 1765 [2019-10-07 17:14:38,092 INFO L226 Difference]: Without dead ends: 1169 [2019-10-07 17:14:38,096 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-07 17:14:38,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2019-10-07 17:14:38,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 1155. [2019-10-07 17:14:38,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1155 states. [2019-10-07 17:14:38,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 1343 transitions. [2019-10-07 17:14:38,169 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 1343 transitions. Word has length 156 [2019-10-07 17:14:38,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:14:38,169 INFO L462 AbstractCegarLoop]: Abstraction has 1155 states and 1343 transitions. [2019-10-07 17:14:38,170 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 17:14:38,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 1343 transitions. [2019-10-07 17:14:38,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2019-10-07 17:14:38,176 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:14:38,176 INFO L385 BasicCegarLoop]: trace histogram [6, 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, 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] [2019-10-07 17:14:38,382 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:38,383 INFO L410 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:14:38,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:14:38,383 INFO L82 PathProgramCache]: Analyzing trace with hash 946266268, now seen corresponding path program 1 times [2019-10-07 17:14:38,384 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:14:38,384 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:38,384 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:38,384 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:38,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:14:38,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:38,567 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 42 proven. 23 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2019-10-07 17:14:38,568 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:38,568 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:14:38,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:38,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:38,799 INFO L256 TraceCheckSpWp]: Trace formula consists of 1103 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-07 17:14:38,805 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:14:38,884 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 117 proven. 4 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-10-07 17:14:38,885 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:14:39,110 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:14:39,242 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:14:39,243 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:14:39,263 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:14:39,343 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2019-10-07 17:14:39,344 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 17:14:39,395 INFO L162 IcfgInterpreter]: Started Sifa with 103 locations of interest [2019-10-07 17:14:39,396 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 17:14:39,410 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 17:14:39,419 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 17:14:39,420 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 17:14:39,789 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-07 17:14:39,826 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 83 for LOIs [2019-10-07 17:14:40,308 INFO L199 IcfgInterpreter]: Interpreting procedure init_model with input of size 53 for LOIs [2019-10-07 17:14:40,368 INFO L199 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 94 for LOIs [2019-10-07 17:14:42,851 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-10-07 17:14:42,865 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-10-07 17:14:43,252 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:43,254 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ε at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:133) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ε at de.uni_freiburg.informatik.ultimate.lib.sifa.PriorityWorklist.add(PriorityWorklist.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.lambda$2(DagInterpreter.java:135) at java.lang.Iterable.forEach(Iterable.java:75) at java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1080) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:135) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.computeTopSummary(TopInputCallSummarizer.java:78) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.summarize(TopInputCallSummarizer.java:67) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:230) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:214) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:197) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:166) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.computeTopSummary(TopInputCallSummarizer.java:78) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.summarize(TopInputCallSummarizer.java:67) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:230) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:214) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:197) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:166) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:99) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:99) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:287) ... 21 more [2019-10-07 17:14:43,261 INFO L168 Benchmark]: Toolchain (without parser) took 14368.72 ms. Allocated memory was 141.0 MB in the beginning and 606.1 MB in the end (delta: 465.0 MB). Free memory was 102.2 MB in the beginning and 365.1 MB in the end (delta: -263.0 MB). Peak memory consumption was 202.1 MB. Max. memory is 7.1 GB. [2019-10-07 17:14:43,262 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 141.0 MB. Free memory was 121.6 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-07 17:14:43,263 INFO L168 Benchmark]: CACSL2BoogieTranslator took 518.27 ms. Allocated memory was 141.0 MB in the beginning and 203.4 MB in the end (delta: 62.4 MB). Free memory was 102.0 MB in the beginning and 179.8 MB in the end (delta: -77.8 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. [2019-10-07 17:14:43,264 INFO L168 Benchmark]: Boogie Preprocessor took 47.98 ms. Allocated memory is still 203.4 MB. Free memory was 179.8 MB in the beginning and 177.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2019-10-07 17:14:43,265 INFO L168 Benchmark]: RCFGBuilder took 1050.89 ms. Allocated memory is still 203.4 MB. Free memory was 177.2 MB in the beginning and 102.9 MB in the end (delta: 74.3 MB). Peak memory consumption was 74.3 MB. Max. memory is 7.1 GB. [2019-10-07 17:14:43,266 INFO L168 Benchmark]: TraceAbstraction took 12745.70 ms. Allocated memory was 203.4 MB in the beginning and 606.1 MB in the end (delta: 402.7 MB). Free memory was 102.9 MB in the beginning and 365.1 MB in the end (delta: -262.2 MB). Peak memory consumption was 140.4 MB. Max. memory is 7.1 GB. [2019-10-07 17:14:43,270 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 141.0 MB. Free memory was 121.6 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 518.27 ms. Allocated memory was 141.0 MB in the beginning and 203.4 MB in the end (delta: 62.4 MB). Free memory was 102.0 MB in the beginning and 179.8 MB in the end (delta: -77.8 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 47.98 ms. Allocated memory is still 203.4 MB. Free memory was 179.8 MB in the beginning and 177.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1050.89 ms. Allocated memory is still 203.4 MB. Free memory was 177.2 MB in the beginning and 102.9 MB in the end (delta: 74.3 MB). Peak memory consumption was 74.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12745.70 ms. Allocated memory was 203.4 MB in the beginning and 606.1 MB in the end (delta: 402.7 MB). Free memory was 102.9 MB in the beginning and 365.1 MB in the end (delta: -262.2 MB). Peak memory consumption was 140.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ε de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ε: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...