/usr/bin/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.01.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 04:51:24,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 04:51:24,824 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 04:51:24,842 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 04:51:24,842 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 04:51:24,844 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 04:51:24,846 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 04:51:24,855 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 04:51:24,857 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 04:51:24,858 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 04:51:24,860 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 04:51:24,862 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 04:51:24,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 04:51:24,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 04:51:24,866 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 04:51:24,868 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 04:51:24,868 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 04:51:24,869 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 04:51:24,872 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 04:51:24,875 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 04:51:24,877 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 04:51:24,880 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 04:51:24,883 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 04:51:24,884 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 04:51:24,888 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 04:51:24,888 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 04:51:24,888 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 04:51:24,890 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 04:51:24,891 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 04:51:24,894 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 04:51:24,894 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 04:51:24,895 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 04:51:24,896 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 04:51:24,896 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 04:51:24,900 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 04:51:24,900 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 04:51:24,901 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 04:51:24,901 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 04:51:24,901 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 04:51:24,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 04:51:24,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 04:51:24,904 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 [2019-11-07 04:51:24,917 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 04:51:24,918 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 04:51:24,919 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 04:51:24,919 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 04:51:24,919 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 04:51:24,920 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 04:51:24,920 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 04:51:24,920 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 04:51:24,920 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 04:51:24,920 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 04:51:24,921 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 04:51:24,921 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 04:51:24,921 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 04:51:24,921 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 04:51:24,921 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 04:51:24,922 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 04:51:24,922 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 04:51:24,922 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 04:51:24,922 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 04:51:24,922 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 04:51:24,923 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 04:51:24,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:51:24,923 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 04:51:24,923 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 04:51:24,923 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 04:51:24,924 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 04:51:24,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 04:51:24,924 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 04:51:24,924 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 [2019-11-07 04:51:25,225 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 04:51:25,242 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 04:51:25,246 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 04:51:25,247 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 04:51:25,247 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 04:51:25,248 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/token_ring.01.cil-1.c [2019-11-07 04:51:25,321 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48affcf6b/0d701fea051e44278510906e2f3015a4/FLAG8fd303fea [2019-11-07 04:51:25,820 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 04:51:25,821 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/token_ring.01.cil-1.c [2019-11-07 04:51:25,829 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48affcf6b/0d701fea051e44278510906e2f3015a4/FLAG8fd303fea [2019-11-07 04:51:26,172 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48affcf6b/0d701fea051e44278510906e2f3015a4 [2019-11-07 04:51:26,183 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 04:51:26,185 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 04:51:26,186 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 04:51:26,186 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 04:51:26,189 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 04:51:26,190 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:51:26" (1/1) ... [2019-11-07 04:51:26,193 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51f4ac1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:26, skipping insertion in model container [2019-11-07 04:51:26,194 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:51:26" (1/1) ... [2019-11-07 04:51:26,201 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 04:51:26,239 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 04:51:26,428 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:51:26,435 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 04:51:26,475 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:51:26,602 INFO L192 MainTranslator]: Completed translation [2019-11-07 04:51:26,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:26 WrapperNode [2019-11-07 04:51:26,603 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 04:51:26,603 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 04:51:26,604 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 04:51:26,604 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 04:51:26,617 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:26" (1/1) ... [2019-11-07 04:51:26,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:26" (1/1) ... [2019-11-07 04:51:26,624 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:26" (1/1) ... [2019-11-07 04:51:26,624 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:26" (1/1) ... [2019-11-07 04:51:26,633 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:26" (1/1) ... [2019-11-07 04:51:26,642 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:26" (1/1) ... [2019-11-07 04:51:26,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:26" (1/1) ... [2019-11-07 04:51:26,648 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 04:51:26,648 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 04:51:26,649 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 04:51:26,649 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 04:51:26,650 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:26" (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 [2019-11-07 04:51:26,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 04:51:26,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 04:51:26,701 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2019-11-07 04:51:26,701 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2019-11-07 04:51:26,702 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2019-11-07 04:51:26,702 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2019-11-07 04:51:26,702 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2019-11-07 04:51:26,702 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2019-11-07 04:51:26,702 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2019-11-07 04:51:26,702 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2019-11-07 04:51:26,703 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-11-07 04:51:26,703 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2019-11-07 04:51:26,703 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2019-11-07 04:51:26,703 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2019-11-07 04:51:26,703 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2019-11-07 04:51:26,703 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2019-11-07 04:51:26,704 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2019-11-07 04:51:26,704 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2019-11-07 04:51:26,704 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2019-11-07 04:51:26,704 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2019-11-07 04:51:26,704 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 04:51:26,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 04:51:26,705 INFO L130 BoogieDeclarations]: Found specification of procedure error [2019-11-07 04:51:26,705 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2019-11-07 04:51:26,705 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2019-11-07 04:51:26,705 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2019-11-07 04:51:26,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 04:51:26,705 INFO L130 BoogieDeclarations]: Found specification of procedure master [2019-11-07 04:51:26,706 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2019-11-07 04:51:26,706 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2019-11-07 04:51:26,706 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2019-11-07 04:51:26,706 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2019-11-07 04:51:26,706 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-11-07 04:51:26,706 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2019-11-07 04:51:26,707 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2019-11-07 04:51:26,707 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2019-11-07 04:51:26,707 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2019-11-07 04:51:26,707 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2019-11-07 04:51:26,707 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2019-11-07 04:51:26,707 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2019-11-07 04:51:26,708 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2019-11-07 04:51:26,708 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 04:51:26,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 04:51:26,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 04:51:27,507 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 04:51:27,507 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-07 04:51:27,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:51:27 BoogieIcfgContainer [2019-11-07 04:51:27,509 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 04:51:27,510 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 04:51:27,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 04:51:27,514 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 04:51:27,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:51:26" (1/3) ... [2019-11-07 04:51:27,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33b9cf88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:51:27, skipping insertion in model container [2019-11-07 04:51:27,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:26" (2/3) ... [2019-11-07 04:51:27,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33b9cf88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:51:27, skipping insertion in model container [2019-11-07 04:51:27,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:51:27" (3/3) ... [2019-11-07 04:51:27,518 INFO L109 eAbstractionObserver]: Analyzing ICFG token_ring.01.cil-1.c [2019-11-07 04:51:27,529 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 04:51:27,538 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 04:51:27,550 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 04:51:27,577 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 04:51:27,578 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 04:51:27,578 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 04:51:27,578 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 04:51:27,579 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 04:51:27,579 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 04:51:27,579 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 04:51:27,579 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 04:51:27,604 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states. [2019-11-07 04:51:27,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-07 04:51:27,613 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:51:27,614 INFO L410 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] [2019-11-07 04:51:27,616 INFO L410 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:51:27,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:51:27,622 INFO L82 PathProgramCache]: Analyzing trace with hash 458852481, now seen corresponding path program 1 times [2019-11-07 04:51:27,632 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:51:27,633 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702542009] [2019-11-07 04:51:27,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:51:27,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:27,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:51:27,993 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702542009] [2019-11-07 04:51:27,994 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:51:27,994 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 04:51:27,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034318281] [2019-11-07 04:51:28,002 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:51:28,003 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:51:28,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:51:28,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 04:51:28,021 INFO L87 Difference]: Start difference. First operand 108 states. Second operand 4 states. [2019-11-07 04:51:28,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:51:28,399 INFO L93 Difference]: Finished difference Result 285 states and 379 transitions. [2019-11-07 04:51:28,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:51:28,401 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2019-11-07 04:51:28,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:51:28,416 INFO L225 Difference]: With dead ends: 285 [2019-11-07 04:51:28,416 INFO L226 Difference]: Without dead ends: 181 [2019-11-07 04:51:28,421 INFO L630 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 [2019-11-07 04:51:28,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-11-07 04:51:28,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 177. [2019-11-07 04:51:28,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2019-11-07 04:51:28,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 215 transitions. [2019-11-07 04:51:28,494 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 215 transitions. Word has length 56 [2019-11-07 04:51:28,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:51:28,494 INFO L462 AbstractCegarLoop]: Abstraction has 177 states and 215 transitions. [2019-11-07 04:51:28,495 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:51:28,495 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 215 transitions. [2019-11-07 04:51:28,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-07 04:51:28,498 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:51:28,498 INFO L410 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] [2019-11-07 04:51:28,498 INFO L410 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:51:28,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:51:28,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1097636960, now seen corresponding path program 1 times [2019-11-07 04:51:28,499 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:51:28,499 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113141266] [2019-11-07 04:51:28,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:51:28,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:28,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:51:28,641 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113141266] [2019-11-07 04:51:28,641 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:51:28,642 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:51:28,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270250924] [2019-11-07 04:51:28,644 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:51:28,644 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:51:28,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:51:28,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:51:28,646 INFO L87 Difference]: Start difference. First operand 177 states and 215 transitions. Second operand 3 states. [2019-11-07 04:51:28,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:51:28,751 INFO L93 Difference]: Finished difference Result 487 states and 633 transitions. [2019-11-07 04:51:28,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:51:28,756 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2019-11-07 04:51:28,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:51:28,764 INFO L225 Difference]: With dead ends: 487 [2019-11-07 04:51:28,764 INFO L226 Difference]: Without dead ends: 326 [2019-11-07 04:51:28,767 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:51:28,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2019-11-07 04:51:28,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 324. [2019-11-07 04:51:28,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2019-11-07 04:51:28,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 408 transitions. [2019-11-07 04:51:28,822 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 408 transitions. Word has length 56 [2019-11-07 04:51:28,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:51:28,822 INFO L462 AbstractCegarLoop]: Abstraction has 324 states and 408 transitions. [2019-11-07 04:51:28,823 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:51:28,823 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 408 transitions. [2019-11-07 04:51:28,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-07 04:51:28,827 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:51:28,828 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:51:28,828 INFO L410 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:51:28,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:51:28,828 INFO L82 PathProgramCache]: Analyzing trace with hash -2069013347, now seen corresponding path program 1 times [2019-11-07 04:51:28,829 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:51:28,829 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411738768] [2019-11-07 04:51:28,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:51:28,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:28,939 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 04:51:28,939 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411738768] [2019-11-07 04:51:28,940 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:51:28,940 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 04:51:28,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908283692] [2019-11-07 04:51:28,941 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:51:28,941 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:51:28,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:51:28,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 04:51:28,942 INFO L87 Difference]: Start difference. First operand 324 states and 408 transitions. Second operand 4 states. [2019-11-07 04:51:29,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:51:29,045 INFO L93 Difference]: Finished difference Result 841 states and 1087 transitions. [2019-11-07 04:51:29,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:51:29,047 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2019-11-07 04:51:29,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:51:29,063 INFO L225 Difference]: With dead ends: 841 [2019-11-07 04:51:29,064 INFO L226 Difference]: Without dead ends: 534 [2019-11-07 04:51:29,068 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 04:51:29,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2019-11-07 04:51:29,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 452. [2019-11-07 04:51:29,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 452 states. [2019-11-07 04:51:29,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 574 transitions. [2019-11-07 04:51:29,153 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 574 transitions. Word has length 91 [2019-11-07 04:51:29,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:51:29,153 INFO L462 AbstractCegarLoop]: Abstraction has 452 states and 574 transitions. [2019-11-07 04:51:29,154 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:51:29,154 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 574 transitions. [2019-11-07 04:51:29,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-11-07 04:51:29,160 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:51:29,161 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 04:51:29,161 INFO L410 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:51:29,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:51:29,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1882668428, now seen corresponding path program 1 times [2019-11-07 04:51:29,162 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:51:29,162 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944251432] [2019-11-07 04:51:29,163 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:51:29,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:29,418 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-11-07 04:51:29,419 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944251432] [2019-11-07 04:51:29,419 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296604822] [2019-11-07 04:51:29,419 INFO L94 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 [2019-11-07 04:51:29,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:29,561 INFO L256 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 04:51:29,573 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:51:29,617 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 04:51:29,617 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:51:29,833 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-11-07 04:51:29,833 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 04:51:29,834 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [8] total 10 [2019-11-07 04:51:29,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241673759] [2019-11-07 04:51:29,835 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:51:29,835 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:51:29,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:51:29,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-07 04:51:29,836 INFO L87 Difference]: Start difference. First operand 452 states and 574 transitions. Second operand 4 states. [2019-11-07 04:51:30,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:51:30,040 INFO L93 Difference]: Finished difference Result 740 states and 963 transitions. [2019-11-07 04:51:30,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:51:30,042 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2019-11-07 04:51:30,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:51:30,049 INFO L225 Difference]: With dead ends: 740 [2019-11-07 04:51:30,049 INFO L226 Difference]: Without dead ends: 526 [2019-11-07 04:51:30,051 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 255 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-07 04:51:30,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2019-11-07 04:51:30,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2019-11-07 04:51:30,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2019-11-07 04:51:30,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 651 transitions. [2019-11-07 04:51:30,111 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 651 transitions. Word has length 131 [2019-11-07 04:51:30,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:51:30,112 INFO L462 AbstractCegarLoop]: Abstraction has 526 states and 651 transitions. [2019-11-07 04:51:30,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:51:30,113 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 651 transitions. [2019-11-07 04:51:30,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-11-07 04:51:30,120 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:51:30,120 INFO L410 BasicCegarLoop]: trace histogram [6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:51:30,324 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:51:30,324 INFO L410 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:51:30,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:51:30,324 INFO L82 PathProgramCache]: Analyzing trace with hash 628789896, now seen corresponding path program 1 times [2019-11-07 04:51:30,325 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:51:30,325 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839645257] [2019-11-07 04:51:30,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:51:30,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:30,488 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 38 proven. 19 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2019-11-07 04:51:30,489 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839645257] [2019-11-07 04:51:30,489 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76483293] [2019-11-07 04:51:30,489 INFO L94 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 [2019-11-07 04:51:30,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:30,685 INFO L256 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-07 04:51:30,694 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:51:30,854 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 95 proven. 4 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-07 04:51:30,854 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:51:31,122 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:51:31,236 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:51:31,237 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:51:31,259 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:51:31,317 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 29 proven. 18 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2019-11-07 04:51:31,318 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [993701041] [2019-11-07 04:51:31,376 INFO L159 IcfgInterpreter]: Started Sifa with 94 locations of interest [2019-11-07 04:51:31,376 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:51:31,385 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:51:31,395 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:51:31,397 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:51:31,579 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 37 for LOIs [2019-11-07 04:51:31,584 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 61 for LOIs [2019-11-07 04:51:31,757 INFO L197 IcfgInterpreter]: Interpreting procedure init_model with input of size 41 for LOIs [2019-11-07 04:51:31,760 INFO L197 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 68 for LOIs [2019-11-07 04:51:35,731 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 22 for LOIs [2019-11-07 04:51:35,733 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 10 for LOIs [2019-11-07 04:51:35,735 INFO L197 IcfgInterpreter]: Interpreting procedure stop_simulation with input of size 10 for LOIs [2019-11-07 04:51:35,752 INFO L197 IcfgInterpreter]: Interpreting procedure eval with input of size 46 for LOIs [2019-11-07 04:51:36,154 INFO L197 IcfgInterpreter]: Interpreting procedure master with input of size 29 for LOIs [2019-11-07 04:51:36,178 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 22 for LOIs [2019-11-07 04:51:36,180 INFO L197 IcfgInterpreter]: Interpreting procedure init_threads with input of size 54 for LOIs [2019-11-07 04:51:36,183 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 22 for LOIs [2019-11-07 04:51:36,185 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 10 for LOIs [2019-11-07 04:51:36,186 INFO L197 IcfgInterpreter]: Interpreting procedure transmit1 with input of size 56 for LOIs [2019-11-07 04:51:36,268 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 10 for LOIs [2019-11-07 04:51:36,278 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 16 for LOIs [2019-11-07 04:51:36,326 INFO L197 IcfgInterpreter]: Interpreting procedure is_master_triggered with input of size 10 for LOIs [2019-11-07 04:51:36,342 INFO L197 IcfgInterpreter]: Interpreting procedure is_transmit1_triggered with input of size 20 for LOIs [2019-11-07 04:51:36,367 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:51:36,692 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2019-11-07 04:51:37,252 WARN L191 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 60 [2019-11-07 04:51:37,442 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2019-11-07 04:51:37,643 WARN L191 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2019-11-07 04:51:37,867 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2019-11-07 04:51:38,156 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2019-11-07 04:51:38,416 WARN L191 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 49 [2019-11-07 04:51:39,474 WARN L191 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2019-11-07 04:51:39,668 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2019-11-07 04:51:40,218 WARN L191 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 59 [2019-11-07 04:51:40,771 WARN L191 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 55 [2019-11-07 04:51:42,549 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2019-11-07 04:51:42,744 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2019-11-07 04:51:43,085 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 36 [2019-11-07 04:51:43,849 WARN L191 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2019-11-07 04:51:44,212 WARN L191 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 39 [2019-11-07 04:51:44,549 WARN L191 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 36 [2019-11-07 04:51:45,316 WARN L191 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 45 [2019-11-07 04:51:45,913 WARN L191 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 45 [2019-11-07 04:51:48,193 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:51:48,194 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 8, 67] total 81 [2019-11-07 04:51:48,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252922354] [2019-11-07 04:51:48,196 INFO L442 AbstractCegarLoop]: Interpolant automaton has 81 states [2019-11-07 04:51:48,196 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:51:48,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2019-11-07 04:51:48,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=5943, Unknown=0, NotChecked=0, Total=6480 [2019-11-07 04:51:48,200 INFO L87 Difference]: Start difference. First operand 526 states and 651 transitions. Second operand 81 states. [2019-11-07 04:51:49,302 WARN L191 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2019-11-07 04:51:49,543 WARN L191 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2019-11-07 04:51:49,752 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2019-11-07 04:51:49,966 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2019-11-07 04:51:50,270 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2019-11-07 04:51:50,502 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2019-11-07 04:51:50,790 WARN L191 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2019-11-07 04:51:51,027 WARN L191 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2019-11-07 04:51:51,414 WARN L191 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2019-11-07 04:51:51,773 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2019-11-07 04:51:51,993 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2019-11-07 04:51:52,219 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2019-11-07 04:51:52,493 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2019-11-07 04:51:52,681 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2019-11-07 04:51:52,928 WARN L191 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2019-11-07 04:51:53,218 WARN L191 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 56 [2019-11-07 04:51:53,632 WARN L191 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 62 [2019-11-07 04:51:53,862 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2019-11-07 04:51:54,128 WARN L191 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 64 [2019-11-07 04:51:54,394 WARN L191 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 61 [2019-11-07 04:51:54,640 WARN L191 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 56 [2019-11-07 04:51:55,008 WARN L191 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 62 [2019-11-07 04:51:55,703 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 47 [2019-11-07 04:51:56,062 WARN L191 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 57 [2019-11-07 04:51:56,456 WARN L191 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 63 [2019-11-07 04:51:56,925 WARN L191 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 67 [2019-11-07 04:51:57,093 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2019-11-07 04:51:57,377 WARN L191 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 60 [2019-11-07 04:51:57,703 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2019-11-07 04:51:57,920 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2019-11-07 04:51:58,215 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2019-11-07 04:51:58,458 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 52 [2019-11-07 04:51:58,706 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 49 [2019-11-07 04:51:59,042 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2019-11-07 04:51:59,534 WARN L191 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 57 [2019-11-07 04:51:59,834 WARN L191 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 50 [2019-11-07 04:52:00,141 WARN L191 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 63 [2019-11-07 04:52:00,433 WARN L191 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 50 [2019-11-07 04:52:00,881 WARN L191 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 65 [2019-11-07 04:52:01,142 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 62 [2019-11-07 04:52:01,559 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2019-11-07 04:52:02,039 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2019-11-07 04:52:02,471 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2019-11-07 04:52:02,688 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2019-11-07 04:52:03,194 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 51 [2019-11-07 04:52:03,393 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2019-11-07 04:52:03,580 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2019-11-07 04:52:03,809 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2019-11-07 04:52:05,146 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2019-11-07 04:52:05,642 WARN L191 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2019-11-07 04:52:05,961 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2019-11-07 04:52:06,251 WARN L191 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2019-11-07 04:52:06,444 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2019-11-07 04:52:06,939 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2019-11-07 04:52:07,115 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2019-11-07 04:52:07,435 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50