/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-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 04:51:27,252 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 04:51:27,254 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 04:51:27,272 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 04:51:27,272 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 04:51:27,274 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 04:51:27,276 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 04:51:27,282 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 04:51:27,287 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 04:51:27,288 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 04:51:27,289 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 04:51:27,290 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 04:51:27,291 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 04:51:27,292 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 04:51:27,293 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 04:51:27,294 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 04:51:27,295 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 04:51:27,296 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 04:51:27,297 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 04:51:27,299 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 04:51:27,301 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 04:51:27,302 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 04:51:27,303 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 04:51:27,303 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 04:51:27,306 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 04:51:27,306 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 04:51:27,306 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 04:51:27,307 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 04:51:27,307 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 04:51:27,308 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 04:51:27,309 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 04:51:27,309 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 04:51:27,310 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 04:51:27,311 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 04:51:27,312 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 04:51:27,312 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 04:51:27,313 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 04:51:27,313 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 04:51:27,313 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 04:51:27,314 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 04:51:27,315 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 04:51:27,316 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 04:51:27,329 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 04:51:27,330 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 04:51:27,331 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 04:51:27,331 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 04:51:27,331 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 04:51:27,332 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 04:51:27,332 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 04:51:27,332 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 04:51:27,332 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 04:51:27,332 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 04:51:27,333 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 04:51:27,333 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 04:51:27,333 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 04:51:27,333 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 04:51:27,333 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 04:51:27,334 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 04:51:27,334 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 04:51:27,334 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 04:51:27,334 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 04:51:27,334 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 04:51:27,335 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 04:51:27,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:51:27,335 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 04:51:27,335 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 04:51:27,335 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 04:51:27,335 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 04:51:27,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 04:51:27,336 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 04:51:27,336 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 04:51:27,620 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 04:51:27,642 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 04:51:27,645 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 04:51:27,647 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 04:51:27,647 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 04:51:27,648 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/token_ring.01.cil-2.c [2019-11-07 04:51:27,722 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2f56c65f/86eba46fa90c43b9aeba66db6da44dac/FLAG05d12db10 [2019-11-07 04:51:28,247 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 04:51:28,248 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/token_ring.01.cil-2.c [2019-11-07 04:51:28,264 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2f56c65f/86eba46fa90c43b9aeba66db6da44dac/FLAG05d12db10 [2019-11-07 04:51:28,567 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2f56c65f/86eba46fa90c43b9aeba66db6da44dac [2019-11-07 04:51:28,578 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 04:51:28,579 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 04:51:28,580 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 04:51:28,581 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 04:51:28,584 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 04:51:28,585 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:51:28" (1/1) ... [2019-11-07 04:51:28,588 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d8d8288 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:28, skipping insertion in model container [2019-11-07 04:51:28,589 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:51:28" (1/1) ... [2019-11-07 04:51:28,596 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 04:51:28,640 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 04:51:28,874 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:51:28,879 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 04:51:29,005 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:51:29,030 INFO L192 MainTranslator]: Completed translation [2019-11-07 04:51:29,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:29 WrapperNode [2019-11-07 04:51:29,030 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 04:51:29,031 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 04:51:29,031 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 04:51:29,031 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 04:51:29,042 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:29" (1/1) ... [2019-11-07 04:51:29,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:29" (1/1) ... [2019-11-07 04:51:29,049 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:29" (1/1) ... [2019-11-07 04:51:29,049 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:29" (1/1) ... [2019-11-07 04:51:29,059 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:29" (1/1) ... [2019-11-07 04:51:29,076 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:29" (1/1) ... [2019-11-07 04:51:29,078 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:29" (1/1) ... [2019-11-07 04:51:29,082 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 04:51:29,082 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 04:51:29,083 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 04:51:29,083 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 04:51:29,084 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:29" (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 [2019-11-07 04:51:29,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 04:51:29,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 04:51:29,139 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2019-11-07 04:51:29,139 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2019-11-07 04:51:29,139 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2019-11-07 04:51:29,139 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2019-11-07 04:51:29,139 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2019-11-07 04:51:29,140 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2019-11-07 04:51:29,140 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2019-11-07 04:51:29,140 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2019-11-07 04:51:29,140 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-11-07 04:51:29,140 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2019-11-07 04:51:29,141 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2019-11-07 04:51:29,141 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2019-11-07 04:51:29,141 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2019-11-07 04:51:29,141 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2019-11-07 04:51:29,141 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2019-11-07 04:51:29,141 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2019-11-07 04:51:29,142 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2019-11-07 04:51:29,142 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2019-11-07 04:51:29,142 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 04:51:29,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 04:51:29,142 INFO L130 BoogieDeclarations]: Found specification of procedure error [2019-11-07 04:51:29,142 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2019-11-07 04:51:29,143 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2019-11-07 04:51:29,143 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2019-11-07 04:51:29,143 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 04:51:29,143 INFO L130 BoogieDeclarations]: Found specification of procedure master [2019-11-07 04:51:29,143 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2019-11-07 04:51:29,144 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2019-11-07 04:51:29,144 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2019-11-07 04:51:29,144 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2019-11-07 04:51:29,144 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-11-07 04:51:29,144 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2019-11-07 04:51:29,144 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2019-11-07 04:51:29,144 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2019-11-07 04:51:29,145 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2019-11-07 04:51:29,145 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2019-11-07 04:51:29,145 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2019-11-07 04:51:29,145 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2019-11-07 04:51:29,145 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2019-11-07 04:51:29,145 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 04:51:29,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 04:51:29,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 04:51:29,959 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 04:51:29,959 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-07 04:51:29,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:51:29 BoogieIcfgContainer [2019-11-07 04:51:29,961 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 04:51:29,962 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 04:51:29,962 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 04:51:29,966 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 04:51:29,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:51:28" (1/3) ... [2019-11-07 04:51:29,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9c32938 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:51:29, skipping insertion in model container [2019-11-07 04:51:29,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:29" (2/3) ... [2019-11-07 04:51:29,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9c32938 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:51:29, skipping insertion in model container [2019-11-07 04:51:29,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:51:29" (3/3) ... [2019-11-07 04:51:29,970 INFO L109 eAbstractionObserver]: Analyzing ICFG token_ring.01.cil-2.c [2019-11-07 04:51:29,981 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 04:51:29,990 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 04:51:30,003 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 04:51:30,031 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 04:51:30,031 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 04:51:30,031 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 04:51:30,031 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 04:51:30,032 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 04:51:30,032 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 04:51:30,032 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 04:51:30,032 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 04:51:30,055 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states. [2019-11-07 04:51:30,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-07 04:51:30,065 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:51:30,066 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, 1] [2019-11-07 04:51:30,068 INFO L410 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:51:30,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:51:30,074 INFO L82 PathProgramCache]: Analyzing trace with hash 643454482, now seen corresponding path program 1 times [2019-11-07 04:51:30,083 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:51:30,083 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422179033] [2019-11-07 04:51:30,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:51:30,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:30,400 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 04:51:30,400 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422179033] [2019-11-07 04:51:30,402 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:51:30,402 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 04:51:30,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054502361] [2019-11-07 04:51:30,410 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:51:30,410 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:51:30,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:51:30,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 04:51:30,424 INFO L87 Difference]: Start difference. First operand 113 states. Second operand 4 states. [2019-11-07 04:51:30,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:51:30,831 INFO L93 Difference]: Finished difference Result 300 states and 406 transitions. [2019-11-07 04:51:30,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:51:30,832 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2019-11-07 04:51:30,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:51:30,849 INFO L225 Difference]: With dead ends: 300 [2019-11-07 04:51:30,849 INFO L226 Difference]: Without dead ends: 191 [2019-11-07 04:51:30,855 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 04:51:30,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-11-07 04:51:30,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 186. [2019-11-07 04:51:30,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2019-11-07 04:51:30,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 230 transitions. [2019-11-07 04:51:30,996 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 230 transitions. Word has length 57 [2019-11-07 04:51:30,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:51:30,997 INFO L462 AbstractCegarLoop]: Abstraction has 186 states and 230 transitions. [2019-11-07 04:51:30,997 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:51:30,997 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 230 transitions. [2019-11-07 04:51:31,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-07 04:51:31,004 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:51:31,004 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, 1] [2019-11-07 04:51:31,005 INFO L410 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:51:31,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:51:31,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1029063149, now seen corresponding path program 1 times [2019-11-07 04:51:31,006 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:51:31,006 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046086514] [2019-11-07 04:51:31,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:51:31,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:31,142 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 04:51:31,142 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046086514] [2019-11-07 04:51:31,143 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:51:31,143 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:51:31,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502441451] [2019-11-07 04:51:31,145 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:51:31,146 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:51:31,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:51:31,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:51:31,147 INFO L87 Difference]: Start difference. First operand 186 states and 230 transitions. Second operand 3 states. [2019-11-07 04:51:31,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:51:31,232 INFO L93 Difference]: Finished difference Result 507 states and 665 transitions. [2019-11-07 04:51:31,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:51:31,233 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2019-11-07 04:51:31,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:51:31,240 INFO L225 Difference]: With dead ends: 507 [2019-11-07 04:51:31,243 INFO L226 Difference]: Without dead ends: 337 [2019-11-07 04:51:31,248 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 04:51:31,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2019-11-07 04:51:31,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 335. [2019-11-07 04:51:31,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2019-11-07 04:51:31,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 425 transitions. [2019-11-07 04:51:31,338 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 425 transitions. Word has length 57 [2019-11-07 04:51:31,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:51:31,339 INFO L462 AbstractCegarLoop]: Abstraction has 335 states and 425 transitions. [2019-11-07 04:51:31,339 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:51:31,339 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 425 transitions. [2019-11-07 04:51:31,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-07 04:51:31,351 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:51:31,352 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, 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 04:51:31,355 INFO L410 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:51:31,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:51:31,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1706780877, now seen corresponding path program 1 times [2019-11-07 04:51:31,356 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:51:31,356 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129885175] [2019-11-07 04:51:31,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:51:31,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:31,511 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 04:51:31,511 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129885175] [2019-11-07 04:51:31,512 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:51:31,512 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 04:51:31,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094689261] [2019-11-07 04:51:31,513 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:51:31,514 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:51:31,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:51:31,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 04:51:31,514 INFO L87 Difference]: Start difference. First operand 335 states and 425 transitions. Second operand 4 states. [2019-11-07 04:51:31,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:51:31,633 INFO L93 Difference]: Finished difference Result 863 states and 1121 transitions. [2019-11-07 04:51:31,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:51:31,634 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2019-11-07 04:51:31,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:51:31,641 INFO L225 Difference]: With dead ends: 863 [2019-11-07 04:51:31,641 INFO L226 Difference]: Without dead ends: 545 [2019-11-07 04:51:31,643 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 04:51:31,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2019-11-07 04:51:31,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 463. [2019-11-07 04:51:31,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 463 states. [2019-11-07 04:51:31,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 591 transitions. [2019-11-07 04:51:31,694 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 591 transitions. Word has length 93 [2019-11-07 04:51:31,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:51:31,695 INFO L462 AbstractCegarLoop]: Abstraction has 463 states and 591 transitions. [2019-11-07 04:51:31,695 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:51:31,695 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 591 transitions. [2019-11-07 04:51:31,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-07 04:51:31,699 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:51:31,700 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, 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 04:51:31,700 INFO L410 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:51:31,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:51:31,701 INFO L82 PathProgramCache]: Analyzing trace with hash 734950659, now seen corresponding path program 1 times [2019-11-07 04:51:31,701 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:51:31,701 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783960030] [2019-11-07 04:51:31,701 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:51:31,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:31,909 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-11-07 04:51:31,909 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783960030] [2019-11-07 04:51:31,909 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779439509] [2019-11-07 04:51:31,910 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 04:51:32,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:32,055 INFO L256 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 04:51:32,074 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:51:32,129 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 04:51:32,129 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:51:32,354 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-11-07 04:51:32,355 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 04:51:32,356 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [8] total 10 [2019-11-07 04:51:32,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981873669] [2019-11-07 04:51:32,357 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:51:32,357 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:51:32,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:51:32,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-07 04:51:32,358 INFO L87 Difference]: Start difference. First operand 463 states and 591 transitions. Second operand 4 states. [2019-11-07 04:51:32,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:51:32,527 INFO L93 Difference]: Finished difference Result 757 states and 989 transitions. [2019-11-07 04:51:32,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:51:32,528 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 133 [2019-11-07 04:51:32,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:51:32,532 INFO L225 Difference]: With dead ends: 757 [2019-11-07 04:51:32,532 INFO L226 Difference]: Without dead ends: 537 [2019-11-07 04:51:32,534 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 259 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 04:51:32,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2019-11-07 04:51:32,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2019-11-07 04:51:32,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 537 states. [2019-11-07 04:51:32,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 668 transitions. [2019-11-07 04:51:32,573 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 668 transitions. Word has length 133 [2019-11-07 04:51:32,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:51:32,573 INFO L462 AbstractCegarLoop]: Abstraction has 537 states and 668 transitions. [2019-11-07 04:51:32,574 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:51:32,574 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 668 transitions. [2019-11-07 04:51:32,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2019-11-07 04:51:32,577 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:51:32,578 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, 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 04:51:32,784 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:51:32,784 INFO L410 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:51:32,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:51:32,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1537180485, now seen corresponding path program 1 times [2019-11-07 04:51:32,785 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:51:32,785 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430193973] [2019-11-07 04:51:32,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:51:32,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:32,959 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 39 proven. 19 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2019-11-07 04:51:32,960 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430193973] [2019-11-07 04:51:32,960 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951388029] [2019-11-07 04:51:32,960 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 04:51:33,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:33,138 INFO L256 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-07 04:51:33,148 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:51:33,246 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 95 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-07 04:51:33,247 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:51:33,509 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:51:33,645 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:51:33,646 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:51:33,665 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:51:33,745 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2019-11-07 04:51:33,745 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [476738607] [2019-11-07 04:51:33,779 INFO L159 IcfgInterpreter]: Started Sifa with 95 locations of interest [2019-11-07 04:51:33,780 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:51:33,793 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:51:33,802 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:51:33,803 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:51:33,961 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 37 for LOIs [2019-11-07 04:51:33,966 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 61 for LOIs [2019-11-07 04:51:34,113 INFO L197 IcfgInterpreter]: Interpreting procedure init_model with input of size 41 for LOIs [2019-11-07 04:51:34,117 INFO L197 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 68 for LOIs [2019-11-07 04:51:37,389 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 22 for LOIs [2019-11-07 04:51:37,391 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 10 for LOIs [2019-11-07 04:51:37,392 INFO L197 IcfgInterpreter]: Interpreting procedure stop_simulation with input of size 10 for LOIs [2019-11-07 04:51:37,408 INFO L197 IcfgInterpreter]: Interpreting procedure eval with input of size 46 for LOIs [2019-11-07 04:51:37,723 INFO L197 IcfgInterpreter]: Interpreting procedure master with input of size 29 for LOIs [2019-11-07 04:51:37,750 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 22 for LOIs [2019-11-07 04:51:37,752 INFO L197 IcfgInterpreter]: Interpreting procedure init_threads with input of size 54 for LOIs [2019-11-07 04:51:37,754 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 22 for LOIs [2019-11-07 04:51:37,756 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 10 for LOIs [2019-11-07 04:51:37,757 INFO L197 IcfgInterpreter]: Interpreting procedure transmit1 with input of size 48 for LOIs [2019-11-07 04:51:37,835 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 10 for LOIs [2019-11-07 04:51:37,848 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 16 for LOIs [2019-11-07 04:51:37,920 INFO L197 IcfgInterpreter]: Interpreting procedure is_master_triggered with input of size 10 for LOIs [2019-11-07 04:51:37,936 INFO L197 IcfgInterpreter]: Interpreting procedure is_transmit1_triggered with input of size 20 for LOIs [2019-11-07 04:51:37,963 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:51:38,285 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2019-11-07 04:51:38,861 WARN L191 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 60 [2019-11-07 04:51:39,044 WARN L191 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2019-11-07 04:51:39,237 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2019-11-07 04:51:39,448 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2019-11-07 04:51:39,990 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 49 [2019-11-07 04:51:41,077 WARN L191 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2019-11-07 04:51:41,245 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2019-11-07 04:51:41,830 WARN L191 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 65 [2019-11-07 04:51:42,461 WARN L191 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2019-11-07 04:51:42,746 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2019-11-07 04:51:44,405 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2019-11-07 04:51:44,607 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2019-11-07 04:51:44,837 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 36 [2019-11-07 04:51:45,444 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2019-11-07 04:51:45,685 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2019-11-07 04:51:45,951 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 42 [2019-11-07 04:51:46,708 WARN L191 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 47 [2019-11-07 04:51:47,287 WARN L191 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 46 [2019-11-07 04:51:49,846 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:51:49,846 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 8, 68] total 82 [2019-11-07 04:51:49,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049046491] [2019-11-07 04:51:49,849 INFO L442 AbstractCegarLoop]: Interpolant automaton has 82 states [2019-11-07 04:51:49,851 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:51:49,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2019-11-07 04:51:49,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=552, Invalid=6090, Unknown=0, NotChecked=0, Total=6642 [2019-11-07 04:51:49,855 INFO L87 Difference]: Start difference. First operand 537 states and 668 transitions. Second operand 82 states. [2019-11-07 04:51:50,961 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2019-11-07 04:51:51,205 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2019-11-07 04:51:51,414 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2019-11-07 04:51:51,688 WARN L191 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2019-11-07 04:51:51,978 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2019-11-07 04:51:52,214 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2019-11-07 04:51:52,484 WARN L191 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2019-11-07 04:51:52,772 WARN L191 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2019-11-07 04:51:53,156 WARN L191 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 57 [2019-11-07 04:51:53,504 WARN L191 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2019-11-07 04:51:53,740 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2019-11-07 04:51:53,967 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2019-11-07 04:51:54,174 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2019-11-07 04:51:54,364 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2019-11-07 04:51:54,607 WARN L191 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2019-11-07 04:51:54,912 WARN L191 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 56 [2019-11-07 04:51:55,235 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 61 [2019-11-07 04:51:55,501 WARN L191 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2019-11-07 04:51:55,839 WARN L191 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-11-07 04:51:56,137 WARN L191 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 56 [2019-11-07 04:51:56,503 WARN L191 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 66 [2019-11-07 04:51:56,809 WARN L191 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 69 [2019-11-07 04:51:57,116 WARN L191 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 61 [2019-11-07 04:51:57,776 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 47 [2019-11-07 04:51:58,251 WARN L191 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 57 [2019-11-07 04:51:58,670 WARN L191 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 62 [2019-11-07 04:51:59,021 WARN L191 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 66 [2019-11-07 04:51:59,342 WARN L191 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 60 [2019-11-07 04:51:59,759 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2019-11-07 04:51:59,922 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2019-11-07 04:52:00,310 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 52 [2019-11-07 04:52:00,544 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 49 [2019-11-07 04:52:00,855 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2019-11-07 04:52:01,534 WARN L191 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 57 [2019-11-07 04:52:01,825 WARN L191 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 50 [2019-11-07 04:52:02,264 WARN L191 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 62 [2019-11-07 04:52:02,564 WARN L191 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 50 [2019-11-07 04:52:02,884 WARN L191 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 68 [2019-11-07 04:52:03,466 WARN L191 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-11-07 04:52:03,808 WARN L191 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 70 [2019-11-07 04:52:04,050 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2019-11-07 04:52:04,686 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2019-11-07 04:52:04,838 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2019-11-07 04:52:05,433 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 51 [2019-11-07 04:52:05,665 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2019-11-07 04:52:05,833 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2019-11-07 04:52:06,585 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2019-11-07 04:52:07,503 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2019-11-07 04:52:07,780 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2019-11-07 04:52:07,947 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2019-11-07 04:52:08,154 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2019-11-07 04:52:08,647 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2019-11-07 04:52:08,879 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2019-11-07 04:52:09,366 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2019-11-07 04:52:09,562 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2019-11-07 04:52:09,885 WARN L191 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 66 [2019-11-07 04:52:10,236 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2019-11-07 04:52:10,432 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2019-11-07 04:52:10,770 WARN L191 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 68 [2019-11-07 04:52:10,940 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2019-11-07 04:52:11,213 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51