/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-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 04:51:29,010 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 04:51:29,012 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 04:51:29,029 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 04:51:29,029 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 04:51:29,031 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 04:51:29,033 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 04:51:29,043 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 04:51:29,048 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 04:51:29,051 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 04:51:29,052 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 04:51:29,054 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 04:51:29,054 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 04:51:29,056 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 04:51:29,058 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 04:51:29,060 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 04:51:29,061 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 04:51:29,062 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 04:51:29,064 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 04:51:29,068 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 04:51:29,072 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 04:51:29,075 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 04:51:29,077 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 04:51:29,078 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 04:51:29,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 04:51:29,080 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 04:51:29,081 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 04:51:29,082 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 04:51:29,083 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 04:51:29,084 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 04:51:29,084 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 04:51:29,086 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 04:51:29,086 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 04:51:29,087 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 04:51:29,089 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 04:51:29,089 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 04:51:29,089 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 04:51:29,090 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 04:51:29,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 04:51:29,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 04:51:29,091 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 04:51:29,092 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 04:51:29,127 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 04:51:29,127 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 04:51:29,128 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 04:51:29,128 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 04:51:29,129 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 04:51:29,129 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 04:51:29,129 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 04:51:29,129 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 04:51:29,129 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 04:51:29,130 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 04:51:29,132 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 04:51:29,132 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 04:51:29,132 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 04:51:29,132 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 04:51:29,133 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 04:51:29,134 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 04:51:29,134 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 04:51:29,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 04:51:29,134 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 04:51:29,135 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 04:51:29,135 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 04:51:29,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:51:29,135 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 04:51:29,135 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 04:51:29,136 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 04:51:29,136 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 04:51:29,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 04:51:29,136 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 04:51:29,137 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 04:51:29,421 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 04:51:29,434 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 04:51:29,438 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 04:51:29,439 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 04:51:29,440 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 04:51:29,440 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/token_ring.02.cil-1.c [2019-11-07 04:51:29,504 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a8651ae4/9ede7f89547348a6af33c031eaa5ed5d/FLAGf3a592098 [2019-11-07 04:51:29,948 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 04:51:29,949 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/token_ring.02.cil-1.c [2019-11-07 04:51:29,958 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a8651ae4/9ede7f89547348a6af33c031eaa5ed5d/FLAGf3a592098 [2019-11-07 04:51:30,355 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a8651ae4/9ede7f89547348a6af33c031eaa5ed5d [2019-11-07 04:51:30,366 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 04:51:30,368 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 04:51:30,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 04:51:30,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 04:51:30,373 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 04:51:30,374 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:51:30" (1/1) ... [2019-11-07 04:51:30,377 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22830b92 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 04:51:30,377 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:51:30" (1/1) ... [2019-11-07 04:51:30,385 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 04:51:30,420 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 04:51:30,725 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:51:30,737 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 04:51:30,883 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:51:30,913 INFO L192 MainTranslator]: Completed translation [2019-11-07 04:51:30,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:30 WrapperNode [2019-11-07 04:51:30,914 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 04:51:30,915 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 04:51:30,915 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 04:51:30,915 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 04:51:30,928 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 04:51:30,929 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 04:51:30,945 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 04:51:30,946 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 04:51:30,957 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 04:51:30,971 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 04:51:30,974 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 04:51:30,978 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 04:51:30,980 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 04:51:30,980 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 04:51:30,980 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 04:51:30,981 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 04:51:31,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 04:51:31,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 04:51:31,042 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2019-11-07 04:51:31,042 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2019-11-07 04:51:31,042 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2019-11-07 04:51:31,043 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2019-11-07 04:51:31,043 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2019-11-07 04:51:31,043 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2019-11-07 04:51:31,043 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2019-11-07 04:51:31,043 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2019-11-07 04:51:31,044 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2019-11-07 04:51:31,044 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2019-11-07 04:51:31,044 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-11-07 04:51:31,044 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2019-11-07 04:51:31,044 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2019-11-07 04:51:31,044 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2019-11-07 04:51:31,045 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2019-11-07 04:51:31,045 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2019-11-07 04:51:31,045 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2019-11-07 04:51:31,045 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2019-11-07 04:51:31,045 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2019-11-07 04:51:31,045 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2019-11-07 04:51:31,046 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 04:51:31,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 04:51:31,046 INFO L130 BoogieDeclarations]: Found specification of procedure error [2019-11-07 04:51:31,046 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2019-11-07 04:51:31,046 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2019-11-07 04:51:31,046 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2019-11-07 04:51:31,047 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2019-11-07 04:51:31,047 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 04:51:31,047 INFO L130 BoogieDeclarations]: Found specification of procedure master [2019-11-07 04:51:31,047 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2019-11-07 04:51:31,047 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2019-11-07 04:51:31,047 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2019-11-07 04:51:31,047 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2019-11-07 04:51:31,048 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2019-11-07 04:51:31,048 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-11-07 04:51:31,048 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2019-11-07 04:51:31,048 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2019-11-07 04:51:31,048 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2019-11-07 04:51:31,048 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2019-11-07 04:51:31,049 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2019-11-07 04:51:31,049 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2019-11-07 04:51:31,049 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2019-11-07 04:51:31,049 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2019-11-07 04:51:31,049 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 04:51:31,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 04:51:31,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 04:51:32,029 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 04:51:32,030 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-11-07 04:51:32,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:51:32 BoogieIcfgContainer [2019-11-07 04:51:32,031 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 04:51:32,033 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 04:51:32,033 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 04:51:32,037 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 04:51:32,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:51:30" (1/3) ... [2019-11-07 04:51:32,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d821ac0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:51:32, skipping insertion in model container [2019-11-07 04:51:32,039 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 04:51:32,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d821ac0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:51:32, skipping insertion in model container [2019-11-07 04:51:32,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:51:32" (3/3) ... [2019-11-07 04:51:32,041 INFO L109 eAbstractionObserver]: Analyzing ICFG token_ring.02.cil-1.c [2019-11-07 04:51:32,051 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 04:51:32,060 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 04:51:32,072 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 04:51:32,101 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 04:51:32,101 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 04:51:32,101 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 04:51:32,102 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 04:51:32,102 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 04:51:32,102 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 04:51:32,103 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 04:51:32,103 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 04:51:32,136 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states. [2019-11-07 04:51:32,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-07 04:51:32,149 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:51:32,150 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] [2019-11-07 04:51:32,152 INFO L410 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:51:32,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:51:32,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1639965672, now seen corresponding path program 1 times [2019-11-07 04:51:32,170 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:51:32,170 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362975285] [2019-11-07 04:51:32,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:51:32,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:32,588 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 04:51:32,589 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362975285] [2019-11-07 04:51:32,590 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:51:32,591 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 04:51:32,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142231896] [2019-11-07 04:51:32,602 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:51:32,602 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:51:32,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:51:32,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 04:51:32,625 INFO L87 Difference]: Start difference. First operand 125 states. Second operand 4 states. [2019-11-07 04:51:33,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:51:33,065 INFO L93 Difference]: Finished difference Result 333 states and 452 transitions. [2019-11-07 04:51:33,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:51:33,067 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2019-11-07 04:51:33,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:51:33,085 INFO L225 Difference]: With dead ends: 333 [2019-11-07 04:51:33,085 INFO L226 Difference]: Without dead ends: 212 [2019-11-07 04:51:33,090 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 04:51:33,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2019-11-07 04:51:33,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2019-11-07 04:51:33,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2019-11-07 04:51:33,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 263 transitions. [2019-11-07 04:51:33,224 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 263 transitions. Word has length 63 [2019-11-07 04:51:33,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:51:33,225 INFO L462 AbstractCegarLoop]: Abstraction has 211 states and 263 transitions. [2019-11-07 04:51:33,225 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:51:33,225 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 263 transitions. [2019-11-07 04:51:33,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-11-07 04:51:33,239 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:51:33,240 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:51:33,241 INFO L410 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:51:33,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:51:33,242 INFO L82 PathProgramCache]: Analyzing trace with hash 849498777, now seen corresponding path program 1 times [2019-11-07 04:51:33,242 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:51:33,242 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126796722] [2019-11-07 04:51:33,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:51:33,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:33,473 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-07 04:51:33,474 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126796722] [2019-11-07 04:51:33,474 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996165410] [2019-11-07 04:51:33,475 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 04:51:33,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:33,655 INFO L256 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 04:51:33,672 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:51:33,756 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-07 04:51:33,757 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:51:33,910 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-07 04:51:33,911 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 04:51:33,911 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2019-11-07 04:51:33,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505300833] [2019-11-07 04:51:33,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:51:33,914 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:51:33,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:51:33,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-07 04:51:33,915 INFO L87 Difference]: Start difference. First operand 211 states and 263 transitions. Second operand 4 states. [2019-11-07 04:51:33,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:51:33,996 INFO L93 Difference]: Finished difference Result 375 states and 473 transitions. [2019-11-07 04:51:33,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:51:33,996 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 106 [2019-11-07 04:51:33,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:51:34,001 INFO L225 Difference]: With dead ends: 375 [2019-11-07 04:51:34,001 INFO L226 Difference]: Without dead ends: 274 [2019-11-07 04:51:34,003 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 211 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 04:51:34,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2019-11-07 04:51:34,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 232. [2019-11-07 04:51:34,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2019-11-07 04:51:34,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 295 transitions. [2019-11-07 04:51:34,046 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 295 transitions. Word has length 106 [2019-11-07 04:51:34,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:51:34,049 INFO L462 AbstractCegarLoop]: Abstraction has 232 states and 295 transitions. [2019-11-07 04:51:34,049 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:51:34,049 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 295 transitions. [2019-11-07 04:51:34,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-11-07 04:51:34,061 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:51:34,062 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:51:34,274 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:51:34,274 INFO L410 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:51:34,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:51:34,274 INFO L82 PathProgramCache]: Analyzing trace with hash -226352789, now seen corresponding path program 1 times [2019-11-07 04:51:34,274 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:51:34,276 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494969463] [2019-11-07 04:51:34,276 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:51:34,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:34,384 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-11-07 04:51:34,384 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494969463] [2019-11-07 04:51:34,385 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745580676] [2019-11-07 04:51:34,385 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 04:51:34,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:34,531 INFO L256 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 04:51:34,538 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:51:34,607 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-11-07 04:51:34,608 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:51:34,825 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-11-07 04:51:34,825 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:51:34,825 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2019-11-07 04:51:34,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607368311] [2019-11-07 04:51:34,826 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:51:34,827 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:51:34,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:51:34,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 04:51:34,827 INFO L87 Difference]: Start difference. First operand 232 states and 295 transitions. Second operand 3 states. [2019-11-07 04:51:34,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:51:34,883 INFO L93 Difference]: Finished difference Result 654 states and 861 transitions. [2019-11-07 04:51:34,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:51:34,883 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 140 [2019-11-07 04:51:34,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:51:34,888 INFO L225 Difference]: With dead ends: 654 [2019-11-07 04:51:34,888 INFO L226 Difference]: Without dead ends: 438 [2019-11-07 04:51:34,890 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 273 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 04:51:34,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2019-11-07 04:51:34,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 432. [2019-11-07 04:51:34,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 432 states. [2019-11-07 04:51:34,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 551 transitions. [2019-11-07 04:51:34,946 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 551 transitions. Word has length 140 [2019-11-07 04:51:34,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:51:34,947 INFO L462 AbstractCegarLoop]: Abstraction has 432 states and 551 transitions. [2019-11-07 04:51:34,948 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:51:34,948 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 551 transitions. [2019-11-07 04:51:34,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-11-07 04:51:34,956 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:51:34,956 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:51:35,157 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:51:35,157 INFO L410 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:51:35,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:51:35,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1178185681, now seen corresponding path program 1 times [2019-11-07 04:51:35,159 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:51:35,159 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535079447] [2019-11-07 04:51:35,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:51:35,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:35,302 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2019-11-07 04:51:35,302 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535079447] [2019-11-07 04:51:35,303 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160209675] [2019-11-07 04:51:35,304 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 04:51:35,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:35,441 INFO L256 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:51:35,446 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:51:35,477 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-07 04:51:35,477 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:51:35,628 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-11-07 04:51:35,628 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 04:51:35,629 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 7 [2019-11-07 04:51:35,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667119149] [2019-11-07 04:51:35,630 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:51:35,630 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:51:35,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:51:35,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-07 04:51:35,631 INFO L87 Difference]: Start difference. First operand 432 states and 551 transitions. Second operand 4 states. [2019-11-07 04:51:35,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:51:35,891 INFO L93 Difference]: Finished difference Result 1243 states and 1691 transitions. [2019-11-07 04:51:35,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:51:35,894 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2019-11-07 04:51:35,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:51:35,906 INFO L225 Difference]: With dead ends: 1243 [2019-11-07 04:51:35,907 INFO L226 Difference]: Without dead ends: 827 [2019-11-07 04:51:35,914 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 281 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 04:51:35,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2019-11-07 04:51:36,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 814. [2019-11-07 04:51:36,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 814 states. [2019-11-07 04:51:36,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1024 transitions. [2019-11-07 04:51:36,048 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1024 transitions. Word has length 140 [2019-11-07 04:51:36,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:51:36,050 INFO L462 AbstractCegarLoop]: Abstraction has 814 states and 1024 transitions. [2019-11-07 04:51:36,051 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:51:36,051 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1024 transitions. [2019-11-07 04:51:36,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-11-07 04:51:36,056 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:51:36,056 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:51:36,265 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:51:36,266 INFO L410 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:51:36,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:51:36,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1375141579, now seen corresponding path program 1 times [2019-11-07 04:51:36,267 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:51:36,268 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785591375] [2019-11-07 04:51:36,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:51:36,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:36,390 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-11-07 04:51:36,391 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785591375] [2019-11-07 04:51:36,391 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589313760] [2019-11-07 04:51:36,391 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 04:51:36,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:36,573 INFO L256 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 04:51:36,579 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:51:36,624 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-07 04:51:36,625 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:51:36,815 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-11-07 04:51:36,815 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:51:36,815 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 3] total 10 [2019-11-07 04:51:36,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500384978] [2019-11-07 04:51:36,816 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:51:36,823 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:51:36,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:51:36,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-07 04:51:36,824 INFO L87 Difference]: Start difference. First operand 814 states and 1024 transitions. Second operand 3 states. [2019-11-07 04:51:36,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:51:36,917 INFO L93 Difference]: Finished difference Result 1482 states and 1898 transitions. [2019-11-07 04:51:36,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:51:36,918 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 154 [2019-11-07 04:51:36,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:51:36,929 INFO L225 Difference]: With dead ends: 1482 [2019-11-07 04:51:36,929 INFO L226 Difference]: Without dead ends: 1070 [2019-11-07 04:51:36,933 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-07 04:51:36,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2019-11-07 04:51:37,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 895. [2019-11-07 04:51:37,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 895 states. [2019-11-07 04:51:37,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1134 transitions. [2019-11-07 04:51:37,010 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1134 transitions. Word has length 154 [2019-11-07 04:51:37,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:51:37,011 INFO L462 AbstractCegarLoop]: Abstraction has 895 states and 1134 transitions. [2019-11-07 04:51:37,011 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:51:37,011 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1134 transitions. [2019-11-07 04:51:37,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-11-07 04:51:37,017 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:51:37,018 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:51:37,230 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:51:37,230 INFO L410 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:51:37,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:51:37,230 INFO L82 PathProgramCache]: Analyzing trace with hash -881958040, now seen corresponding path program 1 times [2019-11-07 04:51:37,231 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:51:37,231 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8840909] [2019-11-07 04:51:37,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:51:37,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:37,344 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-11-07 04:51:37,345 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8840909] [2019-11-07 04:51:37,345 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649806871] [2019-11-07 04:51:37,345 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 04:51:37,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:37,520 INFO L256 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 04:51:37,527 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:51:37,562 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-07 04:51:37,563 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:51:37,789 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-07 04:51:37,790 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 04:51:37,790 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [8] total 10 [2019-11-07 04:51:37,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045641345] [2019-11-07 04:51:37,793 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:51:37,794 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:51:37,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:51:37,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-07 04:51:37,794 INFO L87 Difference]: Start difference. First operand 895 states and 1134 transitions. Second operand 4 states. [2019-11-07 04:51:37,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:51:37,999 INFO L93 Difference]: Finished difference Result 1546 states and 1950 transitions. [2019-11-07 04:51:37,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:51:38,000 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 154 [2019-11-07 04:51:38,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:51:38,008 INFO L225 Difference]: With dead ends: 1546 [2019-11-07 04:51:38,008 INFO L226 Difference]: Without dead ends: 1109 [2019-11-07 04:51:38,012 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 301 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 04:51:38,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2019-11-07 04:51:38,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 1109. [2019-11-07 04:51:38,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1109 states. [2019-11-07 04:51:38,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 1352 transitions. [2019-11-07 04:51:38,083 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 1352 transitions. Word has length 154 [2019-11-07 04:51:38,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:51:38,085 INFO L462 AbstractCegarLoop]: Abstraction has 1109 states and 1352 transitions. [2019-11-07 04:51:38,085 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:51:38,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 1352 transitions. [2019-11-07 04:51:38,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-11-07 04:51:38,091 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:51:38,091 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:51:38,295 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:51:38,296 INFO L410 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:51:38,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:51:38,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1931578956, now seen corresponding path program 2 times [2019-11-07 04:51:38,297 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:51:38,297 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702691953] [2019-11-07 04:51:38,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:51:38,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:38,367 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-11-07 04:51:38,368 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702691953] [2019-11-07 04:51:38,368 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070879201] [2019-11-07 04:51:38,368 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 04:51:38,544 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 04:51:38,544 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 04:51:38,547 INFO L256 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 60 conjunts are in the unsatisfiable core [2019-11-07 04:51:38,556 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:51:38,748 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 29 proven. 39 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-07 04:51:38,748 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:51:39,180 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2019-11-07 04:51:39,256 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-11-07 04:51:39,257 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:51:39,257 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 9] total 13 [2019-11-07 04:51:39,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818081276] [2019-11-07 04:51:39,258 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:51:39,258 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:51:39,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:51:39,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-11-07 04:51:39,258 INFO L87 Difference]: Start difference. First operand 1109 states and 1352 transitions. Second operand 4 states. [2019-11-07 04:51:39,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:51:39,461 INFO L93 Difference]: Finished difference Result 2040 states and 2512 transitions. [2019-11-07 04:51:39,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:51:39,462 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 154 [2019-11-07 04:51:39,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:51:39,473 INFO L225 Difference]: With dead ends: 2040 [2019-11-07 04:51:39,473 INFO L226 Difference]: Without dead ends: 1435 [2019-11-07 04:51:39,478 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 300 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-11-07 04:51:39,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2019-11-07 04:51:39,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1411. [2019-11-07 04:51:39,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1411 states. [2019-11-07 04:51:39,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1411 states to 1411 states and 1662 transitions. [2019-11-07 04:51:39,579 INFO L78 Accepts]: Start accepts. Automaton has 1411 states and 1662 transitions. Word has length 154 [2019-11-07 04:51:39,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:51:39,579 INFO L462 AbstractCegarLoop]: Abstraction has 1411 states and 1662 transitions. [2019-11-07 04:51:39,580 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:51:39,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1411 states and 1662 transitions. [2019-11-07 04:51:39,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-11-07 04:51:39,586 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:51:39,586 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:51:39,792 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:51:39,792 INFO L410 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:51:39,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:51:39,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1334316470, now seen corresponding path program 1 times [2019-11-07 04:51:39,793 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:51:39,793 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521934192] [2019-11-07 04:51:39,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:51:39,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:39,859 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-11-07 04:51:39,860 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521934192] [2019-11-07 04:51:39,863 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144065068] [2019-11-07 04:51:39,863 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 04:51:40,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:40,082 INFO L256 TraceCheckSpWp]: Trace formula consists of 847 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:51:40,086 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:51:40,109 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-07 04:51:40,109 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:51:40,276 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 27 proven. 8 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-07 04:51:40,277 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:51:40,277 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2019-11-07 04:51:40,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048389375] [2019-11-07 04:51:40,278 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:51:40,278 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:51:40,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:51:40,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 04:51:40,279 INFO L87 Difference]: Start difference. First operand 1411 states and 1662 transitions. Second operand 3 states. [2019-11-07 04:51:40,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:51:40,355 INFO L93 Difference]: Finished difference Result 2166 states and 2638 transitions. [2019-11-07 04:51:40,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:51:40,355 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 154 [2019-11-07 04:51:40,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:51:40,363 INFO L225 Difference]: With dead ends: 2166 [2019-11-07 04:51:40,363 INFO L226 Difference]: Without dead ends: 1404 [2019-11-07 04:51:40,367 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 308 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 04:51:40,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2019-11-07 04:51:40,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1391. [2019-11-07 04:51:40,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1391 states. [2019-11-07 04:51:40,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 1612 transitions. [2019-11-07 04:51:40,447 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 1612 transitions. Word has length 154 [2019-11-07 04:51:40,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:51:40,448 INFO L462 AbstractCegarLoop]: Abstraction has 1391 states and 1612 transitions. [2019-11-07 04:51:40,448 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:51:40,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 1612 transitions. [2019-11-07 04:51:40,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-11-07 04:51:40,453 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:51:40,453 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:51:40,657 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:51:40,658 INFO L410 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:51:40,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:51:40,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1587365183, now seen corresponding path program 1 times [2019-11-07 04:51:40,658 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:51:40,659 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379023198] [2019-11-07 04:51:40,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:51:40,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:40,722 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-07 04:51:40,722 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379023198] [2019-11-07 04:51:40,722 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960361385] [2019-11-07 04:51:40,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:51:40,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:40,955 INFO L256 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 04:51:40,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:51:40,981 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-07 04:51:40,981 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:51:41,134 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-07 04:51:41,134 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:51:41,135 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 5 [2019-11-07 04:51:41,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985438377] [2019-11-07 04:51:41,135 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:51:41,136 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:51:41,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:51:41,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 04:51:41,136 INFO L87 Difference]: Start difference. First operand 1391 states and 1612 transitions. Second operand 4 states. [2019-11-07 04:51:41,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:51:41,572 INFO L93 Difference]: Finished difference Result 3416 states and 4151 transitions. [2019-11-07 04:51:41,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 04:51:41,572 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 155 [2019-11-07 04:51:41,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:51:41,587 INFO L225 Difference]: With dead ends: 3416 [2019-11-07 04:51:41,588 INFO L226 Difference]: Without dead ends: 2042 [2019-11-07 04:51:41,594 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-07 04:51:41,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2042 states. [2019-11-07 04:51:41,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2042 to 1696. [2019-11-07 04:51:41,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1696 states. [2019-11-07 04:51:41,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 2037 transitions. [2019-11-07 04:51:41,729 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 2037 transitions. Word has length 155 [2019-11-07 04:51:41,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:51:41,730 INFO L462 AbstractCegarLoop]: Abstraction has 1696 states and 2037 transitions. [2019-11-07 04:51:41,730 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:51:41,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 2037 transitions. [2019-11-07 04:51:41,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-11-07 04:51:41,739 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:51:41,739 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 04:51:41,952 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:51:41,953 INFO L410 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:51:41,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:51:41,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1779210507, now seen corresponding path program 1 times [2019-11-07 04:51:41,954 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:51:41,955 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244197171] [2019-11-07 04:51:41,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:51:42,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:42,160 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 41 proven. 23 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2019-11-07 04:51:42,160 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244197171] [2019-11-07 04:51:42,160 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527530954] [2019-11-07 04:51:42,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:51:42,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:51:42,535 INFO L256 TraceCheckSpWp]: Trace formula consists of 1095 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-07 04:51:42,541 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:51:42,637 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 117 proven. 4 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2019-11-07 04:51:42,638 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:51:42,844 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:51:42,940 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:51:42,941 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:51:42,953 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:51:42,988 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2019-11-07 04:51:42,988 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1425642846] [2019-11-07 04:51:43,023 INFO L159 IcfgInterpreter]: Started Sifa with 102 locations of interest [2019-11-07 04:51:43,024 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:51:43,030 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:51:43,037 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:51:43,038 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:51:43,166 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-11-07 04:51:43,169 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 81 for LOIs [2019-11-07 04:51:43,373 INFO L197 IcfgInterpreter]: Interpreting procedure init_model with input of size 51 for LOIs [2019-11-07 04:51:43,376 INFO L197 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 96 for LOIs [2019-11-07 04:51:44,523 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-11-07 04:51:44,534 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-11-07 04:51:45,252 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-11-07 04:51:45,260 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-11-07 04:51:48,038 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 32 for LOIs [2019-11-07 04:51:48,041 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-11-07 04:51:48,053 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-11-07 04:51:48,104 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 14 for LOIs [2019-11-07 04:51:48,105 INFO L197 IcfgInterpreter]: Interpreting procedure stop_simulation with input of size 14 for LOIs [2019-11-07 04:51:48,128 INFO L197 IcfgInterpreter]: Interpreting procedure eval with input of size 68 for LOIs [2019-11-07 04:51:48,486 INFO L197 IcfgInterpreter]: Interpreting procedure master with input of size 36 for LOIs [2019-11-07 04:51:48,516 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 27 for LOIs [2019-11-07 04:51:48,519 INFO L197 IcfgInterpreter]: Interpreting procedure init_threads with input of size 78 for LOIs [2019-11-07 04:51:48,522 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 35 for LOIs [2019-11-07 04:51:48,524 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-11-07 04:51:48,531 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-11-07 04:51:48,567 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 14 for LOIs [2019-11-07 04:51:48,568 INFO L197 IcfgInterpreter]: Interpreting procedure transmit1 with input of size 33 for LOIs [2019-11-07 04:51:48,656 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 69 for LOIs [2019-11-07 04:51:48,823 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2019-11-07 04:51:48,888 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 23 for LOIs [2019-11-07 04:51:49,002 INFO L197 IcfgInterpreter]: Interpreting procedure is_master_triggered with input of size 14 for LOIs [2019-11-07 04:51:49,034 INFO L197 IcfgInterpreter]: Interpreting procedure is_transmit1_triggered with input of size 14 for LOIs [2019-11-07 04:51:49,077 INFO L197 IcfgInterpreter]: Interpreting procedure is_transmit2_triggered with input of size 24 for LOIs [2019-11-07 04:51:49,087 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:51:49,579 WARN L191 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2019-11-07 04:51:49,706 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2019-11-07 04:51:49,836 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2019-11-07 04:51:50,470 WARN L191 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 86 [2019-11-07 04:51:50,799 WARN L191 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 72 [2019-11-07 04:51:51,139 WARN L191 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 74 [2019-11-07 04:51:51,537 WARN L191 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 51 [2019-11-07 04:51:52,107 WARN L191 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 64 [2019-11-07 04:51:53,951 WARN L191 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 58 [2019-11-07 04:51:54,989 WARN L191 SmtUtils]: Spent 721.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 78 [2019-11-07 04:51:55,824 WARN L191 SmtUtils]: Spent 698.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 78 [2019-11-07 04:51:56,186 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2019-11-07 04:51:56,346 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2019-11-07 04:51:57,322 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2019-11-07 04:51:57,544 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2019-11-07 04:51:58,170 WARN L191 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 43 [2019-11-07 04:51:58,562 WARN L191 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 45 [2019-11-07 04:51:59,117 WARN L191 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 45 [2019-11-07 04:51:59,714 WARN L191 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 51 [2019-11-07 04:52:00,052 WARN L191 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 49 [2019-11-07 04:52:00,405 WARN L191 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2019-11-07 04:52:00,767 WARN L191 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 51 [2019-11-07 04:52:01,541 WARN L191 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 57 [2019-11-07 04:52:02,154 WARN L191 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 59 [2019-11-07 04:52:03,174 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 38 [2019-11-07 04:52:04,700 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:52:04,701 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 8, 74] total 88 [2019-11-07 04:52:04,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465551600] [2019-11-07 04:52:04,704 INFO L442 AbstractCegarLoop]: Interpolant automaton has 88 states [2019-11-07 04:52:04,704 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:52:04,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2019-11-07 04:52:04,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=7090, Unknown=0, NotChecked=0, Total=7656 [2019-11-07 04:52:04,707 INFO L87 Difference]: Start difference. First operand 1696 states and 2037 transitions. Second operand 88 states. [2019-11-07 04:52:05,100 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2019-11-07 04:52:05,293 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2019-11-07 04:52:06,176 WARN L191 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2019-11-07 04:52:06,601 WARN L191 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 82 [2019-11-07 04:52:06,935 WARN L191 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 80 [2019-11-07 04:52:07,293 WARN L191 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2019-11-07 04:52:07,780 WARN L191 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2019-11-07 04:52:08,126 WARN L191 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2019-11-07 04:52:08,517 WARN L191 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 83