/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.02.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 04:51:28,956 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 04:51:28,959 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 04:51:28,975 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 04:51:28,976 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 04:51:28,977 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 04:51:28,978 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 04:51:28,980 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 04:51:28,981 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 04:51:28,982 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 04:51:28,983 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 04:51:28,984 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 04:51:28,985 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 04:51:28,986 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 04:51:28,987 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 04:51:28,988 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 04:51:28,989 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 04:51:28,990 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 04:51:28,991 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 04:51:28,993 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 04:51:28,995 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 04:51:28,996 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 04:51:28,997 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 04:51:28,998 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 04:51:29,000 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 04:51:29,003 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 04:51:29,004 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 04:51:29,005 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 04:51:29,005 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 04:51:29,006 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 04:51:29,007 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 04:51:29,007 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 04:51:29,008 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 04:51:29,008 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 04:51:29,009 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 04:51:29,009 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 04:51:29,010 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 04:51:29,024 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 04:51:29,024 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 04:51:29,026 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 04:51:29,026 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 04:51:29,026 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 04:51:29,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 04:51:29,027 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 04:51:29,027 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 04:51:29,027 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 04:51:29,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 04:51:29,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 04:51:29,028 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 04:51:29,028 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 04:51:29,028 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 04:51:29,028 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 04:51:29,028 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 04:51:29,028 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 04:51:29,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 04:51:29,029 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 04:51:29,029 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 04:51:29,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 04:51:29,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:51:29,030 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 04:51:29,030 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 04:51:29,030 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 04:51:29,030 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 04:51:29,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 04:51:29,031 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 04:51:29,031 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 04:51:29,311 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 04:51:29,323 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 04:51:29,327 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 04:51:29,328 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 04:51:29,329 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 04:51:29,329 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/token_ring.02.cil-2.c [2019-11-07 04:51:29,405 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d9ca045a/001c5b5acdf34e17a703a475ecf8d47e/FLAGda45d19bb [2019-11-07 04:51:29,901 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 04:51:29,903 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/token_ring.02.cil-2.c [2019-11-07 04:51:29,916 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d9ca045a/001c5b5acdf34e17a703a475ecf8d47e/FLAGda45d19bb [2019-11-07 04:51:30,259 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d9ca045a/001c5b5acdf34e17a703a475ecf8d47e [2019-11-07 04:51:30,277 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 04:51:30,279 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 04:51:30,290 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 04:51:30,291 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 04:51:30,296 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 04:51:30,297 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:51:30" (1/1) ... [2019-11-07 04:51:30,300 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40e41eaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:30, skipping insertion in model container [2019-11-07 04:51:30,300 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:51:30" (1/1) ... [2019-11-07 04:51:30,308 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 04:51:30,346 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 04:51:30,587 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:51:30,592 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 04:51:30,726 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:51:30,754 INFO L192 MainTranslator]: Completed translation [2019-11-07 04:51:30,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:30 WrapperNode [2019-11-07 04:51:30,754 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 04:51:30,755 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 04:51:30,755 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 04:51:30,755 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 04:51:30,765 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:30" (1/1) ... [2019-11-07 04:51:30,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:30" (1/1) ... [2019-11-07 04:51:30,775 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:30" (1/1) ... [2019-11-07 04:51:30,775 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:30" (1/1) ... [2019-11-07 04:51:30,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:30" (1/1) ... [2019-11-07 04:51:30,807 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:30" (1/1) ... [2019-11-07 04:51:30,809 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:30" (1/1) ... [2019-11-07 04:51:30,819 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 04:51:30,819 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 04:51:30,819 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 04:51:30,820 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 04:51:30,821 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:30" (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 04:51:30,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 04:51:30,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 04:51:30,903 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2019-11-07 04:51:30,903 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2019-11-07 04:51:30,904 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2019-11-07 04:51:30,905 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2019-11-07 04:51:30,907 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2019-11-07 04:51:30,907 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2019-11-07 04:51:30,907 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2019-11-07 04:51:30,907 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2019-11-07 04:51:30,907 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2019-11-07 04:51:30,907 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2019-11-07 04:51:30,908 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-11-07 04:51:30,908 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2019-11-07 04:51:30,908 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2019-11-07 04:51:30,908 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2019-11-07 04:51:30,908 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2019-11-07 04:51:30,908 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2019-11-07 04:51:30,909 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2019-11-07 04:51:30,909 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2019-11-07 04:51:30,909 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2019-11-07 04:51:30,909 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2019-11-07 04:51:30,909 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 04:51:30,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 04:51:30,910 INFO L130 BoogieDeclarations]: Found specification of procedure error [2019-11-07 04:51:30,910 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2019-11-07 04:51:30,910 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2019-11-07 04:51:30,910 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2019-11-07 04:51:30,910 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2019-11-07 04:51:30,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 04:51:30,911 INFO L130 BoogieDeclarations]: Found specification of procedure master [2019-11-07 04:51:30,911 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2019-11-07 04:51:30,911 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2019-11-07 04:51:30,911 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2019-11-07 04:51:30,911 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2019-11-07 04:51:30,911 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2019-11-07 04:51:30,912 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-11-07 04:51:30,912 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2019-11-07 04:51:30,912 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2019-11-07 04:51:30,912 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2019-11-07 04:51:30,912 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2019-11-07 04:51:30,912 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2019-11-07 04:51:30,913 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2019-11-07 04:51:30,913 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2019-11-07 04:51:30,913 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2019-11-07 04:51:30,913 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 04:51:30,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 04:51:30,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 04:51:31,820 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 04:51:31,821 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-11-07 04:51:31,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:51:31 BoogieIcfgContainer [2019-11-07 04:51:31,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 04:51:31,824 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 04:51:31,824 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 04:51:31,827 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 04:51:31,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:51:30" (1/3) ... [2019-11-07 04:51:31,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1164c1c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:51:31, skipping insertion in model container [2019-11-07 04:51:31,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:30" (2/3) ... [2019-11-07 04:51:31,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1164c1c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:51:31, skipping insertion in model container [2019-11-07 04:51:31,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:51:31" (3/3) ... [2019-11-07 04:51:31,831 INFO L109 eAbstractionObserver]: Analyzing ICFG token_ring.02.cil-2.c [2019-11-07 04:51:31,842 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 04:51:31,851 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 04:51:31,863 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 04:51:31,892 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 04:51:31,892 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 04:51:31,892 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 04:51:31,892 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 04:51:31,893 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 04:51:31,893 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 04:51:31,893 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 04:51:31,893 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 04:51:31,915 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states. [2019-11-07 04:51:31,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-07 04:51:31,925 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:51:31,926 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, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:51:31,928 INFO L410 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:51:31,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:51:31,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1027832444, now seen corresponding path program 1 times [2019-11-07 04:51:31,942 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:51:31,943 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373659215] [2019-11-07 04:51:31,943 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:51:32,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:32,301 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 04:51:32,302 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373659215] [2019-11-07 04:51:32,303 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:51:32,303 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 04:51:32,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714659680] [2019-11-07 04:51:32,312 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:51:32,312 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:51:32,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:51:32,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 04:51:32,332 INFO L87 Difference]: Start difference. First operand 130 states. Second operand 4 states. [2019-11-07 04:51:32,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:51:32,740 INFO L93 Difference]: Finished difference Result 344 states and 471 transitions. [2019-11-07 04:51:32,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:51:32,742 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2019-11-07 04:51:32,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:51:32,766 INFO L225 Difference]: With dead ends: 344 [2019-11-07 04:51:32,766 INFO L226 Difference]: Without dead ends: 218 [2019-11-07 04:51:32,771 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 04:51:32,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-11-07 04:51:32,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2019-11-07 04:51:32,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-11-07 04:51:32,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 272 transitions. [2019-11-07 04:51:32,856 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 272 transitions. Word has length 64 [2019-11-07 04:51:32,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:51:32,857 INFO L462 AbstractCegarLoop]: Abstraction has 217 states and 272 transitions. [2019-11-07 04:51:32,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:51:32,857 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 272 transitions. [2019-11-07 04:51:32,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-11-07 04:51:32,863 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:51:32,864 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:51:32,864 INFO L410 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:51:32,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:51:32,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1647916486, now seen corresponding path program 1 times [2019-11-07 04:51:32,865 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:51:32,865 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712007562] [2019-11-07 04:51:32,865 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:51:32,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:32,981 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-07 04:51:32,981 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712007562] [2019-11-07 04:51:32,981 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390113699] [2019-11-07 04:51:32,982 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 04:51:33,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:33,144 INFO L256 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 04:51:33,156 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:51:33,233 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-07 04:51:33,234 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:51:33,359 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-07 04:51:33,360 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 04:51:33,363 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2019-11-07 04:51:33,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173643243] [2019-11-07 04:51:33,369 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:51:33,369 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:51:33,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:51:33,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-07 04:51:33,370 INFO L87 Difference]: Start difference. First operand 217 states and 272 transitions. Second operand 4 states. [2019-11-07 04:51:33,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:51:33,468 INFO L93 Difference]: Finished difference Result 386 states and 490 transitions. [2019-11-07 04:51:33,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:51:33,469 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 108 [2019-11-07 04:51:33,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:51:33,477 INFO L225 Difference]: With dead ends: 386 [2019-11-07 04:51:33,478 INFO L226 Difference]: Without dead ends: 280 [2019-11-07 04:51:33,481 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 215 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-07 04:51:33,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2019-11-07 04:51:33,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 238. [2019-11-07 04:51:33,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2019-11-07 04:51:33,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 304 transitions. [2019-11-07 04:51:33,541 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 304 transitions. Word has length 108 [2019-11-07 04:51:33,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:51:33,542 INFO L462 AbstractCegarLoop]: Abstraction has 238 states and 304 transitions. [2019-11-07 04:51:33,542 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:51:33,543 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 304 transitions. [2019-11-07 04:51:33,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-07 04:51:33,549 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:51:33,549 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:51:33,754 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:51:33,755 INFO L410 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:51:33,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:51:33,755 INFO L82 PathProgramCache]: Analyzing trace with hash 222884582, now seen corresponding path program 1 times [2019-11-07 04:51:33,756 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:51:33,756 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992873943] [2019-11-07 04:51:33,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:51:33,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:33,972 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-11-07 04:51:33,973 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992873943] [2019-11-07 04:51:33,973 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385968144] [2019-11-07 04:51:33,973 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 04:51:34,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:34,150 INFO L256 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 04:51:34,157 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:51:34,216 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-11-07 04:51:34,216 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:51:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-11-07 04:51:34,407 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:51:34,408 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2019-11-07 04:51:34,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159508291] [2019-11-07 04:51:34,409 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:51:34,409 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:51:34,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:51:34,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 04:51:34,409 INFO L87 Difference]: Start difference. First operand 238 states and 304 transitions. Second operand 3 states. [2019-11-07 04:51:34,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:51:34,471 INFO L93 Difference]: Finished difference Result 672 states and 888 transitions. [2019-11-07 04:51:34,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:51:34,472 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 142 [2019-11-07 04:51:34,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:51:34,480 INFO L225 Difference]: With dead ends: 672 [2019-11-07 04:51:34,480 INFO L226 Difference]: Without dead ends: 450 [2019-11-07 04:51:34,482 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 277 SyntacticMatches, 8 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 04:51:34,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2019-11-07 04:51:34,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 443. [2019-11-07 04:51:34,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2019-11-07 04:51:34,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 568 transitions. [2019-11-07 04:51:34,560 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 568 transitions. Word has length 142 [2019-11-07 04:51:34,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:51:34,563 INFO L462 AbstractCegarLoop]: Abstraction has 443 states and 568 transitions. [2019-11-07 04:51:34,563 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:51:34,563 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 568 transitions. [2019-11-07 04:51:34,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-07 04:51:34,574 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:51:34,574 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:51:34,775 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:51:34,775 INFO L410 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:51:34,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:51:34,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1481257174, now seen corresponding path program 1 times [2019-11-07 04:51:34,776 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:51:34,776 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325667122] [2019-11-07 04:51:34,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:51:34,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:34,956 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2019-11-07 04:51:34,957 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325667122] [2019-11-07 04:51:34,957 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014746707] [2019-11-07 04:51:34,957 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:51:35,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:35,102 INFO L256 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:51:35,107 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:51:35,136 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-07 04:51:35,136 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:51:35,272 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-11-07 04:51:35,273 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 04:51:35,273 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 7 [2019-11-07 04:51:35,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59039512] [2019-11-07 04:51:35,275 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:51:35,275 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:51:35,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:51:35,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-07 04:51:35,276 INFO L87 Difference]: Start difference. First operand 443 states and 568 transitions. Second operand 4 states. [2019-11-07 04:51:35,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:51:35,534 INFO L93 Difference]: Finished difference Result 1276 states and 1742 transitions. [2019-11-07 04:51:35,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:51:35,535 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 142 [2019-11-07 04:51:35,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:51:35,542 INFO L225 Difference]: With dead ends: 1276 [2019-11-07 04:51:35,542 INFO L226 Difference]: Without dead ends: 849 [2019-11-07 04:51:35,545 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-07 04:51:35,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2019-11-07 04:51:35,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 835. [2019-11-07 04:51:35,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 835 states. [2019-11-07 04:51:35,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 1057 transitions. [2019-11-07 04:51:35,602 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 1057 transitions. Word has length 142 [2019-11-07 04:51:35,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:51:35,603 INFO L462 AbstractCegarLoop]: Abstraction has 835 states and 1057 transitions. [2019-11-07 04:51:35,603 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:51:35,603 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 1057 transitions. [2019-11-07 04:51:35,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-11-07 04:51:35,609 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:51:35,609 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:51:35,814 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:51:35,814 INFO L410 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:51:35,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:51:35,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1555232879, now seen corresponding path program 1 times [2019-11-07 04:51:35,815 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:51:35,815 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452126485] [2019-11-07 04:51:35,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:51:35,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:35,971 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-11-07 04:51:35,971 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452126485] [2019-11-07 04:51:35,971 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161818310] [2019-11-07 04:51:35,971 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:51:36,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:36,126 INFO L256 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 04:51:36,141 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:51:36,213 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-07 04:51:36,213 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:51:36,386 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-07 04:51:36,386 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 04:51:36,387 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [8] total 10 [2019-11-07 04:51:36,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732665847] [2019-11-07 04:51:36,388 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:51:36,388 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:51:36,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:51:36,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-07 04:51:36,389 INFO L87 Difference]: Start difference. First operand 835 states and 1057 transitions. Second operand 4 states. [2019-11-07 04:51:36,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:51:36,566 INFO L93 Difference]: Finished difference Result 1465 states and 1845 transitions. [2019-11-07 04:51:36,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:51:36,566 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 156 [2019-11-07 04:51:36,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:51:36,575 INFO L225 Difference]: With dead ends: 1465 [2019-11-07 04:51:36,575 INFO L226 Difference]: Without dead ends: 1049 [2019-11-07 04:51:36,578 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 305 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-07 04:51:36,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2019-11-07 04:51:36,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 1049. [2019-11-07 04:51:36,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1049 states. [2019-11-07 04:51:36,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1275 transitions. [2019-11-07 04:51:36,646 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1275 transitions. Word has length 156 [2019-11-07 04:51:36,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:51:36,647 INFO L462 AbstractCegarLoop]: Abstraction has 1049 states and 1275 transitions. [2019-11-07 04:51:36,647 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:51:36,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1275 transitions. [2019-11-07 04:51:36,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-11-07 04:51:36,654 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:51:36,654 INFO L410 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:51:36,862 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:51:36,863 INFO L410 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:51:36,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:51:36,863 INFO L82 PathProgramCache]: Analyzing trace with hash 649083913, now seen corresponding path program 1 times [2019-11-07 04:51:36,863 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:51:36,864 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924733409] [2019-11-07 04:51:36,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:51:36,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:37,113 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 42 proven. 23 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-11-07 04:51:37,114 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924733409] [2019-11-07 04:51:37,114 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879256521] [2019-11-07 04:51:37,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:51:37,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:37,318 INFO L256 TraceCheckSpWp]: Trace formula consists of 1105 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-07 04:51:37,323 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:51:37,406 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-07 04:51:37,407 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:51:37,718 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 43 proven. 6 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2019-11-07 04:51:37,719 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:51:37,719 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 4] total 12 [2019-11-07 04:51:37,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485855046] [2019-11-07 04:51:37,720 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 04:51:37,721 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:51:37,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 04:51:37,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2019-11-07 04:51:37,721 INFO L87 Difference]: Start difference. First operand 1049 states and 1275 transitions. Second operand 6 states. [2019-11-07 04:51:38,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:51:38,116 INFO L93 Difference]: Finished difference Result 1698 states and 2107 transitions. [2019-11-07 04:51:38,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 04:51:38,118 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 216 [2019-11-07 04:51:38,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:51:38,128 INFO L225 Difference]: With dead ends: 1698 [2019-11-07 04:51:38,128 INFO L226 Difference]: Without dead ends: 1163 [2019-11-07 04:51:38,132 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 434 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2019-11-07 04:51:38,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2019-11-07 04:51:38,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1163. [2019-11-07 04:51:38,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1163 states. [2019-11-07 04:51:38,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 1377 transitions. [2019-11-07 04:51:38,214 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 1377 transitions. Word has length 216 [2019-11-07 04:51:38,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:51:38,217 INFO L462 AbstractCegarLoop]: Abstraction has 1163 states and 1377 transitions. [2019-11-07 04:51:38,217 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 04:51:38,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 1377 transitions. [2019-11-07 04:51:38,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-11-07 04:51:38,222 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:51:38,222 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:51:38,436 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:51:38,436 INFO L410 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:51:38,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:51:38,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1030054453, now seen corresponding path program 1 times [2019-11-07 04:51:38,437 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:51:38,437 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374655198] [2019-11-07 04:51:38,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:51:38,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:38,542 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-11-07 04:51:38,543 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374655198] [2019-11-07 04:51:38,544 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751473382] [2019-11-07 04:51:38,544 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:51:38,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:38,763 INFO L256 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:51:38,773 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:51:38,818 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-07 04:51:38,818 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:51:38,955 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-07 04:51:38,955 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:51:38,955 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2019-11-07 04:51:38,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078948537] [2019-11-07 04:51:38,956 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:51:38,956 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:51:38,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:51:38,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 04:51:38,957 INFO L87 Difference]: Start difference. First operand 1163 states and 1377 transitions. Second operand 3 states. [2019-11-07 04:51:39,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:51:39,032 INFO L93 Difference]: Finished difference Result 1765 states and 2154 transitions. [2019-11-07 04:51:39,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:51:39,033 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 156 [2019-11-07 04:51:39,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:51:39,040 INFO L225 Difference]: With dead ends: 1765 [2019-11-07 04:51:39,041 INFO L226 Difference]: Without dead ends: 1169 [2019-11-07 04:51:39,044 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 04:51:39,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2019-11-07 04:51:39,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 1155. [2019-11-07 04:51:39,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1155 states. [2019-11-07 04:51:39,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 1343 transitions. [2019-11-07 04:51:39,110 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 1343 transitions. Word has length 156 [2019-11-07 04:51:39,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:51:39,111 INFO L462 AbstractCegarLoop]: Abstraction has 1155 states and 1343 transitions. [2019-11-07 04:51:39,111 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:51:39,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 1343 transitions. [2019-11-07 04:51:39,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2019-11-07 04:51:39,116 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:51:39,117 INFO L410 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:51:39,324 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:51:39,324 INFO L410 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:51:39,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:51:39,325 INFO L82 PathProgramCache]: Analyzing trace with hash 946266268, now seen corresponding path program 1 times [2019-11-07 04:51:39,325 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:51:39,325 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158403996] [2019-11-07 04:51:39,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:51:39,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:39,519 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 42 proven. 23 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2019-11-07 04:51:39,520 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158403996] [2019-11-07 04:51:39,520 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762675664] [2019-11-07 04:51:39,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:51:39,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:39,806 INFO L256 TraceCheckSpWp]: Trace formula consists of 1103 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-07 04:51:39,811 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:51:39,903 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 117 proven. 4 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-11-07 04:51:39,904 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:51:40,196 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:51:40,305 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:51:40,306 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:51:40,328 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:51:40,400 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2019-11-07 04:51:40,407 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [140651852] [2019-11-07 04:51:40,452 INFO L159 IcfgInterpreter]: Started Sifa with 103 locations of interest [2019-11-07 04:51:40,452 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:51:40,462 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:51:40,471 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:51:40,472 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:51:40,627 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-11-07 04:51:40,631 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 83 for LOIs [2019-11-07 04:51:40,929 INFO L197 IcfgInterpreter]: Interpreting procedure init_model with input of size 53 for LOIs [2019-11-07 04:51:40,932 INFO L197 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 94 for LOIs [2019-11-07 04:51:42,008 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 136 [2019-11-07 04:51:42,108 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-11-07 04:51:42,128 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-11-07 04:51:42,926 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-11-07 04:51:42,931 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-11-07 04:51:46,472 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 32 for LOIs [2019-11-07 04:51:46,476 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-11-07 04:51:46,486 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-11-07 04:51:46,526 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 14 for LOIs [2019-11-07 04:51:46,529 INFO L197 IcfgInterpreter]: Interpreting procedure stop_simulation with input of size 14 for LOIs [2019-11-07 04:51:46,553 INFO L197 IcfgInterpreter]: Interpreting procedure eval with input of size 68 for LOIs [2019-11-07 04:51:46,846 INFO L197 IcfgInterpreter]: Interpreting procedure master with input of size 36 for LOIs [2019-11-07 04:51:46,879 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 27 for LOIs [2019-11-07 04:51:46,881 INFO L197 IcfgInterpreter]: Interpreting procedure init_threads with input of size 76 for LOIs [2019-11-07 04:51:46,883 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 35 for LOIs [2019-11-07 04:51:46,885 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-11-07 04:51:46,892 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-11-07 04:51:46,926 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 14 for LOIs [2019-11-07 04:51:46,927 INFO L197 IcfgInterpreter]: Interpreting procedure transmit1 with input of size 58 for LOIs [2019-11-07 04:51:47,019 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 14 for LOIs [2019-11-07 04:51:47,038 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 23 for LOIs [2019-11-07 04:51:47,110 INFO L197 IcfgInterpreter]: Interpreting procedure is_master_triggered with input of size 14 for LOIs [2019-11-07 04:51:47,140 INFO L197 IcfgInterpreter]: Interpreting procedure is_transmit1_triggered with input of size 24 for LOIs [2019-11-07 04:51:47,166 INFO L197 IcfgInterpreter]: Interpreting procedure is_transmit2_triggered with input of size 14 for LOIs [2019-11-07 04:51:47,169 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:51:47,576 WARN L191 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2019-11-07 04:51:47,727 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2019-11-07 04:51:47,912 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2019-11-07 04:51:48,492 WARN L191 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 86 [2019-11-07 04:51:48,808 WARN L191 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 72 [2019-11-07 04:51:49,144 WARN L191 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 74 [2019-11-07 04:51:49,463 WARN L191 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 50 [2019-11-07 04:51:50,022 WARN L191 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 64 [2019-11-07 04:51:51,805 WARN L191 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 58 [2019-11-07 04:51:52,477 WARN L191 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 77 [2019-11-07 04:51:53,092 WARN L191 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 74 [2019-11-07 04:51:53,530 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2019-11-07 04:51:55,417 WARN L191 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 48 [2019-11-07 04:51:55,839 WARN L191 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 48 [2019-11-07 04:51:56,425 WARN L191 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 49 [2019-11-07 04:51:57,210 WARN L191 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 49 [2019-11-07 04:51:57,528 WARN L191 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 49 [2019-11-07 04:51:57,871 WARN L191 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2019-11-07 04:51:58,216 WARN L191 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 51 [2019-11-07 04:51:59,064 WARN L191 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 54 [2019-11-07 04:51:59,678 WARN L191 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 63 [2019-11-07 04:52:02,520 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:52:02,521 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 8, 74] total 88 [2019-11-07 04:52:02,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106256764] [2019-11-07 04:52:02,523 INFO L442 AbstractCegarLoop]: Interpolant automaton has 88 states [2019-11-07 04:52:02,524 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:52:02,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2019-11-07 04:52:02,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=7065, Unknown=0, NotChecked=0, Total=7656 [2019-11-07 04:52:02,531 INFO L87 Difference]: Start difference. First operand 1155 states and 1343 transitions. Second operand 88 states. [2019-11-07 04:52:02,876 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2019-11-07 04:52:03,058 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2019-11-07 04:52:03,845 WARN L191 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2019-11-07 04:52:04,223 WARN L191 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 82 [2019-11-07 04:52:04,560 WARN L191 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2019-11-07 04:52:04,922 WARN L191 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 80 [2019-11-07 04:52:05,343 WARN L191 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2019-11-07 04:52:05,683 WARN L191 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2019-11-07 04:52:06,056 WARN L191 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 83 [2019-11-07 04:52:06,427 WARN L191 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 83 [2019-11-07 04:52:06,846 WARN L191 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 80 [2019-11-07 04:52:07,184 WARN L191 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2019-11-07 04:52:07,570 WARN L191 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 84 [2019-11-07 04:52:07,975 WARN L191 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 85 [2019-11-07 04:52:08,556 WARN L191 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 81 [2019-11-07 04:52:09,043 WARN L191 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 82 [2019-11-07 04:52:09,397 WARN L191 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2019-11-07 04:52:09,733 WARN L191 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2019-11-07 04:52:10,099 WARN L191 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83