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/transmitter.06.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 23:27:18,046 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 23:27:18,048 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 23:27:18,068 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 23:27:18,069 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 23:27:18,071 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 23:27:18,073 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 23:27:18,074 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 23:27:18,076 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 23:27:18,077 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 23:27:18,078 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 23:27:18,079 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 23:27:18,079 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 23:27:18,080 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 23:27:18,081 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 23:27:18,082 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 23:27:18,083 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 23:27:18,084 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 23:27:18,085 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 23:27:18,087 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 23:27:18,089 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 23:27:18,090 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 23:27:18,091 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 23:27:18,092 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 23:27:18,094 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 23:27:18,094 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 23:27:18,094 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 23:27:18,095 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 23:27:18,096 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 23:27:18,097 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 23:27:18,097 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 23:27:18,098 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 23:27:18,098 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 23:27:18,099 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 23:27:18,102 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 23:27:18,102 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 23:27:18,105 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 23:27:18,105 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 23:27:18,106 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 23:27:18,107 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 23:27:18,109 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 23:27:18,109 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 23:27:18,133 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 23:27:18,133 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 23:27:18,135 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 23:27:18,135 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 23:27:18,135 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 23:27:18,135 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 23:27:18,136 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 23:27:18,136 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 23:27:18,136 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 23:27:18,136 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 23:27:18,137 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 23:27:18,138 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 23:27:18,138 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 23:27:18,138 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 23:27:18,139 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 23:27:18,139 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 23:27:18,139 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 23:27:18,139 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 23:27:18,139 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 23:27:18,140 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 23:27:18,140 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 23:27:18,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:27:18,141 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 23:27:18,141 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 23:27:18,141 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 23:27:18,141 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 23:27:18,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 23:27:18,142 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 23:27:18,142 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-13 23:27:18,452 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 23:27:18,465 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 23:27:18,468 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 23:27:18,470 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 23:27:18,470 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 23:27:18,471 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/transmitter.06.cil.c [2019-10-13 23:27:18,531 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59e80529a/7664bc14d511489684619132bba64bfa/FLAG0bba906ee [2019-10-13 23:27:18,952 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 23:27:18,953 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/transmitter.06.cil.c [2019-10-13 23:27:18,969 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59e80529a/7664bc14d511489684619132bba64bfa/FLAG0bba906ee [2019-10-13 23:27:19,298 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59e80529a/7664bc14d511489684619132bba64bfa [2019-10-13 23:27:19,308 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 23:27:19,309 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 23:27:19,310 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 23:27:19,310 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 23:27:19,314 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 23:27:19,315 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:27:19" (1/1) ... [2019-10-13 23:27:19,318 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ad15de0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:19, skipping insertion in model container [2019-10-13 23:27:19,318 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:27:19" (1/1) ... [2019-10-13 23:27:19,325 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 23:27:19,384 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 23:27:19,697 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:27:19,705 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 23:27:19,853 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:27:19,878 INFO L192 MainTranslator]: Completed translation [2019-10-13 23:27:19,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:19 WrapperNode [2019-10-13 23:27:19,879 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 23:27:19,880 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 23:27:19,880 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 23:27:19,880 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 23:27:19,893 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:19" (1/1) ... [2019-10-13 23:27:19,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:19" (1/1) ... [2019-10-13 23:27:19,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:19" (1/1) ... [2019-10-13 23:27:19,904 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:19" (1/1) ... [2019-10-13 23:27:19,919 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:19" (1/1) ... [2019-10-13 23:27:19,945 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:19" (1/1) ... [2019-10-13 23:27:19,954 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:19" (1/1) ... [2019-10-13 23:27:19,962 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 23:27:19,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 23:27:19,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 23:27:19,965 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 23:27:19,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:27:20,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 23:27:20,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 23:27:20,019 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2019-10-13 23:27:20,019 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2019-10-13 23:27:20,020 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2019-10-13 23:27:20,020 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2019-10-13 23:27:20,020 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2019-10-13 23:27:20,020 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit4 [2019-10-13 23:27:20,020 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit5 [2019-10-13 23:27:20,021 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit6 [2019-10-13 23:27:20,021 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2019-10-13 23:27:20,021 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2019-10-13 23:27:20,021 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2019-10-13 23:27:20,021 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2019-10-13 23:27:20,021 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit4_triggered [2019-10-13 23:27:20,022 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit5_triggered [2019-10-13 23:27:20,022 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit6_triggered [2019-10-13 23:27:20,022 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2019-10-13 23:27:20,022 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2019-10-13 23:27:20,022 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2019-10-13 23:27:20,022 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-10-13 23:27:20,023 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2019-10-13 23:27:20,023 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2019-10-13 23:27:20,023 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2019-10-13 23:27:20,023 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2019-10-13 23:27:20,023 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2019-10-13 23:27:20,023 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2019-10-13 23:27:20,024 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2019-10-13 23:27:20,024 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2019-10-13 23:27:20,024 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2019-10-13 23:27:20,024 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 23:27:20,024 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 23:27:20,024 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 23:27:20,025 INFO L130 BoogieDeclarations]: Found specification of procedure error [2019-10-13 23:27:20,025 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2019-10-13 23:27:20,025 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2019-10-13 23:27:20,025 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2019-10-13 23:27:20,025 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2019-10-13 23:27:20,025 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit4_triggered [2019-10-13 23:27:20,026 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit5_triggered [2019-10-13 23:27:20,026 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit6_triggered [2019-10-13 23:27:20,026 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2019-10-13 23:27:20,026 INFO L130 BoogieDeclarations]: Found specification of procedure master [2019-10-13 23:27:20,026 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2019-10-13 23:27:20,026 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2019-10-13 23:27:20,027 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2019-10-13 23:27:20,027 INFO L130 BoogieDeclarations]: Found specification of procedure transmit4 [2019-10-13 23:27:20,027 INFO L130 BoogieDeclarations]: Found specification of procedure transmit5 [2019-10-13 23:27:20,027 INFO L130 BoogieDeclarations]: Found specification of procedure transmit6 [2019-10-13 23:27:20,027 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2019-10-13 23:27:20,027 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2019-10-13 23:27:20,028 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2019-10-13 23:27:20,028 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-10-13 23:27:20,028 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2019-10-13 23:27:20,028 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2019-10-13 23:27:20,028 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2019-10-13 23:27:20,028 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2019-10-13 23:27:20,028 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2019-10-13 23:27:20,029 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2019-10-13 23:27:20,029 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2019-10-13 23:27:20,029 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2019-10-13 23:27:20,029 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 23:27:20,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 23:27:20,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 23:27:21,438 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 23:27:21,439 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 23:27:21,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:27:21 BoogieIcfgContainer [2019-10-13 23:27:21,441 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 23:27:21,443 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 23:27:21,443 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 23:27:21,446 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 23:27:21,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:27:19" (1/3) ... [2019-10-13 23:27:21,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@119200cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:27:21, skipping insertion in model container [2019-10-13 23:27:21,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:19" (2/3) ... [2019-10-13 23:27:21,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@119200cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:27:21, skipping insertion in model container [2019-10-13 23:27:21,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:27:21" (3/3) ... [2019-10-13 23:27:21,460 INFO L109 eAbstractionObserver]: Analyzing ICFG transmitter.06.cil.c [2019-10-13 23:27:21,470 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 23:27:21,479 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 23:27:21,490 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 23:27:21,526 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 23:27:21,526 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 23:27:21,527 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 23:27:21,527 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 23:27:21,527 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 23:27:21,527 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 23:27:21,527 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 23:27:21,528 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 23:27:21,557 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states. [2019-10-13 23:27:21,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-13 23:27:21,576 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:21,577 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:27:21,580 INFO L410 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:21,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:21,585 INFO L82 PathProgramCache]: Analyzing trace with hash -767649143, now seen corresponding path program 1 times [2019-10-13 23:27:21,594 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:21,595 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117198614] [2019-10-13 23:27:21,595 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:21,595 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:21,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:21,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:22,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:27:22,047 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117198614] [2019-10-13 23:27:22,048 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:22,049 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 23:27:22,050 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116689424] [2019-10-13 23:27:22,055 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:22,055 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:22,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:22,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:27:22,073 INFO L87 Difference]: Start difference. First operand 191 states. Second operand 4 states. [2019-10-13 23:27:22,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:22,550 INFO L93 Difference]: Finished difference Result 532 states and 745 transitions. [2019-10-13 23:27:22,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:22,552 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2019-10-13 23:27:22,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:22,573 INFO L225 Difference]: With dead ends: 532 [2019-10-13 23:27:22,574 INFO L226 Difference]: Without dead ends: 345 [2019-10-13 23:27:22,586 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:27:22,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2019-10-13 23:27:22,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 341. [2019-10-13 23:27:22,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2019-10-13 23:27:22,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 445 transitions. [2019-10-13 23:27:22,739 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 445 transitions. Word has length 96 [2019-10-13 23:27:22,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:22,741 INFO L462 AbstractCegarLoop]: Abstraction has 341 states and 445 transitions. [2019-10-13 23:27:22,741 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:22,741 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 445 transitions. [2019-10-13 23:27:22,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-13 23:27:22,757 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:22,757 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:27:22,758 INFO L410 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:22,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:22,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1364338890, now seen corresponding path program 1 times [2019-10-13 23:27:22,760 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:22,761 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599615010] [2019-10-13 23:27:22,761 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:22,761 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:22,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:22,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:22,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:27:22,954 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599615010] [2019-10-13 23:27:22,954 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:22,955 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 23:27:22,955 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469187003] [2019-10-13 23:27:22,957 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:22,957 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:22,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:22,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:27:22,958 INFO L87 Difference]: Start difference. First operand 341 states and 445 transitions. Second operand 4 states. [2019-10-13 23:27:23,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:23,290 INFO L93 Difference]: Finished difference Result 982 states and 1353 transitions. [2019-10-13 23:27:23,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:23,291 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2019-10-13 23:27:23,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:23,297 INFO L225 Difference]: With dead ends: 982 [2019-10-13 23:27:23,297 INFO L226 Difference]: Without dead ends: 657 [2019-10-13 23:27:23,300 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:27:23,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2019-10-13 23:27:23,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 652. [2019-10-13 23:27:23,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 652 states. [2019-10-13 23:27:23,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 848 transitions. [2019-10-13 23:27:23,378 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 848 transitions. Word has length 96 [2019-10-13 23:27:23,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:23,378 INFO L462 AbstractCegarLoop]: Abstraction has 652 states and 848 transitions. [2019-10-13 23:27:23,378 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:23,379 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 848 transitions. [2019-10-13 23:27:23,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-13 23:27:23,380 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:23,380 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:27:23,381 INFO L410 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:23,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:23,381 INFO L82 PathProgramCache]: Analyzing trace with hash 186364329, now seen corresponding path program 1 times [2019-10-13 23:27:23,381 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:23,382 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230009849] [2019-10-13 23:27:23,382 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:23,382 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:23,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:23,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:23,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:27:23,493 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230009849] [2019-10-13 23:27:23,493 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:23,493 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 23:27:23,493 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087579277] [2019-10-13 23:27:23,494 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:23,494 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:23,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:23,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:27:23,495 INFO L87 Difference]: Start difference. First operand 652 states and 848 transitions. Second operand 4 states. [2019-10-13 23:27:23,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:23,799 INFO L93 Difference]: Finished difference Result 1907 states and 2620 transitions. [2019-10-13 23:27:23,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:23,800 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2019-10-13 23:27:23,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:23,809 INFO L225 Difference]: With dead ends: 1907 [2019-10-13 23:27:23,809 INFO L226 Difference]: Without dead ends: 1271 [2019-10-13 23:27:23,813 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:27:23,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2019-10-13 23:27:23,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 1264. [2019-10-13 23:27:23,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1264 states. [2019-10-13 23:27:23,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 1638 transitions. [2019-10-13 23:27:23,904 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 1638 transitions. Word has length 96 [2019-10-13 23:27:23,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:23,904 INFO L462 AbstractCegarLoop]: Abstraction has 1264 states and 1638 transitions. [2019-10-13 23:27:23,905 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:23,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 1638 transitions. [2019-10-13 23:27:23,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-13 23:27:23,906 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:23,906 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:27:23,907 INFO L410 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:23,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:23,907 INFO L82 PathProgramCache]: Analyzing trace with hash -844966486, now seen corresponding path program 1 times [2019-10-13 23:27:23,907 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:23,908 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504412549] [2019-10-13 23:27:23,908 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:23,908 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:23,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:23,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:24,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:27:24,035 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504412549] [2019-10-13 23:27:24,035 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:24,035 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 23:27:24,035 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417460927] [2019-10-13 23:27:24,036 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:24,036 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:24,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:24,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:27:24,037 INFO L87 Difference]: Start difference. First operand 1264 states and 1638 transitions. Second operand 4 states. [2019-10-13 23:27:24,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:24,457 INFO L93 Difference]: Finished difference Result 3727 states and 5116 transitions. [2019-10-13 23:27:24,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:24,458 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2019-10-13 23:27:24,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:24,479 INFO L225 Difference]: With dead ends: 3727 [2019-10-13 23:27:24,479 INFO L226 Difference]: Without dead ends: 2479 [2019-10-13 23:27:24,491 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:27:24,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2479 states. [2019-10-13 23:27:24,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2479 to 2468. [2019-10-13 23:27:24,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2468 states. [2019-10-13 23:27:24,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2468 states to 2468 states and 3192 transitions. [2019-10-13 23:27:24,666 INFO L78 Accepts]: Start accepts. Automaton has 2468 states and 3192 transitions. Word has length 96 [2019-10-13 23:27:24,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:24,667 INFO L462 AbstractCegarLoop]: Abstraction has 2468 states and 3192 transitions. [2019-10-13 23:27:24,667 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:24,668 INFO L276 IsEmpty]: Start isEmpty. Operand 2468 states and 3192 transitions. [2019-10-13 23:27:24,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-13 23:27:24,670 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:24,671 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:27:24,671 INFO L410 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:24,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:24,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1718444181, now seen corresponding path program 1 times [2019-10-13 23:27:24,672 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:24,672 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068461917] [2019-10-13 23:27:24,672 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:24,673 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:24,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:24,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:24,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:27:24,802 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068461917] [2019-10-13 23:27:24,803 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:24,803 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 23:27:24,803 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547281019] [2019-10-13 23:27:24,804 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:27:24,804 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:24,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:27:24,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:27:24,805 INFO L87 Difference]: Start difference. First operand 2468 states and 3192 transitions. Second operand 3 states. [2019-10-13 23:27:25,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:25,059 INFO L93 Difference]: Finished difference Result 7320 states and 10195 transitions. [2019-10-13 23:27:25,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:27:25,060 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 96 [2019-10-13 23:27:25,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:25,098 INFO L225 Difference]: With dead ends: 7320 [2019-10-13 23:27:25,099 INFO L226 Difference]: Without dead ends: 4868 [2019-10-13 23:27:25,118 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:27:25,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4868 states. [2019-10-13 23:27:25,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4868 to 4868. [2019-10-13 23:27:25,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4868 states. [2019-10-13 23:27:25,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4868 states to 4868 states and 6635 transitions. [2019-10-13 23:27:25,488 INFO L78 Accepts]: Start accepts. Automaton has 4868 states and 6635 transitions. Word has length 96 [2019-10-13 23:27:25,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:25,490 INFO L462 AbstractCegarLoop]: Abstraction has 4868 states and 6635 transitions. [2019-10-13 23:27:25,490 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:27:25,490 INFO L276 IsEmpty]: Start isEmpty. Operand 4868 states and 6635 transitions. [2019-10-13 23:27:25,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-10-13 23:27:25,497 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:25,497 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:27:25,498 INFO L410 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:25,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:25,498 INFO L82 PathProgramCache]: Analyzing trace with hash 942542599, now seen corresponding path program 1 times [2019-10-13 23:27:25,498 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:25,499 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210441709] [2019-10-13 23:27:25,499 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:25,499 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:25,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:25,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:25,607 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 23:27:25,608 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210441709] [2019-10-13 23:27:25,609 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:25,609 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 23:27:25,609 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912791939] [2019-10-13 23:27:25,610 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:25,610 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:25,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:25,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:27:25,611 INFO L87 Difference]: Start difference. First operand 4868 states and 6635 transitions. Second operand 4 states. [2019-10-13 23:27:26,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:26,238 INFO L93 Difference]: Finished difference Result 15383 states and 21803 transitions. [2019-10-13 23:27:26,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:26,239 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 114 [2019-10-13 23:27:26,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:26,308 INFO L225 Difference]: With dead ends: 15383 [2019-10-13 23:27:26,309 INFO L226 Difference]: Without dead ends: 10532 [2019-10-13 23:27:26,344 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:27:26,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10532 states. [2019-10-13 23:27:26,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10532 to 8046. [2019-10-13 23:27:26,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8046 states. [2019-10-13 23:27:27,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8046 states to 8046 states and 11400 transitions. [2019-10-13 23:27:27,038 INFO L78 Accepts]: Start accepts. Automaton has 8046 states and 11400 transitions. Word has length 114 [2019-10-13 23:27:27,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:27,038 INFO L462 AbstractCegarLoop]: Abstraction has 8046 states and 11400 transitions. [2019-10-13 23:27:27,039 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:27,039 INFO L276 IsEmpty]: Start isEmpty. Operand 8046 states and 11400 transitions. [2019-10-13 23:27:27,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-10-13 23:27:27,060 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:27,060 INFO L380 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:27:27,060 INFO L410 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:27,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:27,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1778376072, now seen corresponding path program 1 times [2019-10-13 23:27:27,061 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:27,061 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151937106] [2019-10-13 23:27:27,061 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:27,062 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:27,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:27,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:27,195 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-10-13 23:27:27,196 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151937106] [2019-10-13 23:27:27,196 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:27,196 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 23:27:27,196 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563767901] [2019-10-13 23:27:27,197 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:27:27,197 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:27,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:27:27,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:27:27,198 INFO L87 Difference]: Start difference. First operand 8046 states and 11400 transitions. Second operand 3 states. [2019-10-13 23:27:27,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:27,893 INFO L93 Difference]: Finished difference Result 22248 states and 32246 transitions. [2019-10-13 23:27:27,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:27:27,894 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 176 [2019-10-13 23:27:27,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:27,980 INFO L225 Difference]: With dead ends: 22248 [2019-10-13 23:27:27,981 INFO L226 Difference]: Without dead ends: 14219 [2019-10-13 23:27:28,041 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:27:28,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14219 states. [2019-10-13 23:27:29,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14219 to 10886. [2019-10-13 23:27:29,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10886 states. [2019-10-13 23:27:29,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10886 states to 10886 states and 15656 transitions. [2019-10-13 23:27:29,418 INFO L78 Accepts]: Start accepts. Automaton has 10886 states and 15656 transitions. Word has length 176 [2019-10-13 23:27:29,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:29,419 INFO L462 AbstractCegarLoop]: Abstraction has 10886 states and 15656 transitions. [2019-10-13 23:27:29,419 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:27:29,419 INFO L276 IsEmpty]: Start isEmpty. Operand 10886 states and 15656 transitions. [2019-10-13 23:27:29,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-13 23:27:29,440 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:29,440 INFO L380 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, 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, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:27:29,441 INFO L410 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:29,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:29,441 INFO L82 PathProgramCache]: Analyzing trace with hash -219056969, now seen corresponding path program 1 times [2019-10-13 23:27:29,441 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:29,442 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224332438] [2019-10-13 23:27:29,442 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:29,442 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:29,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:29,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:29,552 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-10-13 23:27:29,553 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224332438] [2019-10-13 23:27:29,553 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073324240] [2019-10-13 23:27:29,553 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 [2019-10-13 23:27:29,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:29,750 INFO L256 TraceCheckSpWp]: Trace formula consists of 1235 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 23:27:29,763 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:27:29,818 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-13 23:27:29,818 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:27:30,115 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-10-13 23:27:30,116 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:27:30,116 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 7 [2019-10-13 23:27:30,117 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439809525] [2019-10-13 23:27:30,118 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:30,118 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:30,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:30,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:27:30,119 INFO L87 Difference]: Start difference. First operand 10886 states and 15656 transitions. Second operand 4 states. [2019-10-13 23:27:31,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:31,379 INFO L93 Difference]: Finished difference Result 32369 states and 50153 transitions. [2019-10-13 23:27:31,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:31,380 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 177 [2019-10-13 23:27:31,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:31,498 INFO L225 Difference]: With dead ends: 32369 [2019-10-13 23:27:31,498 INFO L226 Difference]: Without dead ends: 21499 [2019-10-13 23:27:31,582 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:27:31,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21499 states. [2019-10-13 23:27:32,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21499 to 21358. [2019-10-13 23:27:32,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21358 states. [2019-10-13 23:27:33,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21358 states to 21358 states and 30804 transitions. [2019-10-13 23:27:33,114 INFO L78 Accepts]: Start accepts. Automaton has 21358 states and 30804 transitions. Word has length 177 [2019-10-13 23:27:33,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:33,115 INFO L462 AbstractCegarLoop]: Abstraction has 21358 states and 30804 transitions. [2019-10-13 23:27:33,115 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:33,115 INFO L276 IsEmpty]: Start isEmpty. Operand 21358 states and 30804 transitions. [2019-10-13 23:27:33,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-10-13 23:27:33,146 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:33,146 INFO L380 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:27:33,351 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:33,351 INFO L410 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:33,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:33,352 INFO L82 PathProgramCache]: Analyzing trace with hash 828050317, now seen corresponding path program 1 times [2019-10-13 23:27:33,352 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:33,353 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648567986] [2019-10-13 23:27:33,353 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:33,353 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:33,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:33,437 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-10-13 23:27:33,438 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648567986] [2019-10-13 23:27:33,438 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:33,438 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 23:27:33,438 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111950630] [2019-10-13 23:27:33,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:27:33,439 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:33,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:27:33,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:27:33,440 INFO L87 Difference]: Start difference. First operand 21358 states and 30804 transitions. Second operand 3 states. [2019-10-13 23:27:35,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:35,396 INFO L93 Difference]: Finished difference Result 57957 states and 85753 transitions. [2019-10-13 23:27:35,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:27:35,397 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 176 [2019-10-13 23:27:35,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:35,572 INFO L225 Difference]: With dead ends: 57957 [2019-10-13 23:27:35,572 INFO L226 Difference]: Without dead ends: 36616 [2019-10-13 23:27:35,752 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:27:35,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36616 states. [2019-10-13 23:27:37,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36616 to 31366. [2019-10-13 23:27:37,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31366 states. [2019-10-13 23:27:37,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31366 states to 31366 states and 45087 transitions. [2019-10-13 23:27:37,717 INFO L78 Accepts]: Start accepts. Automaton has 31366 states and 45087 transitions. Word has length 176 [2019-10-13 23:27:37,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:37,718 INFO L462 AbstractCegarLoop]: Abstraction has 31366 states and 45087 transitions. [2019-10-13 23:27:37,718 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:27:37,718 INFO L276 IsEmpty]: Start isEmpty. Operand 31366 states and 45087 transitions. [2019-10-13 23:27:37,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-13 23:27:37,761 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:37,761 INFO L380 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, 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, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:27:37,762 INFO L410 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:37,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:37,762 INFO L82 PathProgramCache]: Analyzing trace with hash -961391972, now seen corresponding path program 1 times [2019-10-13 23:27:37,762 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:37,763 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455802733] [2019-10-13 23:27:37,763 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:37,763 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:37,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:37,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:37,878 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-10-13 23:27:37,879 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455802733] [2019-10-13 23:27:37,879 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677112067] [2019-10-13 23:27:37,879 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 [2019-10-13 23:27:38,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:38,074 INFO L256 TraceCheckSpWp]: Trace formula consists of 1235 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 23:27:38,082 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:27:38,117 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 23:27:38,117 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:27:38,277 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-10-13 23:27:38,277 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:27:38,277 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 7 [2019-10-13 23:27:38,278 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431508998] [2019-10-13 23:27:38,278 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:38,279 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:38,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:38,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:27:38,279 INFO L87 Difference]: Start difference. First operand 31366 states and 45087 transitions. Second operand 4 states. [2019-10-13 23:27:41,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:41,472 INFO L93 Difference]: Finished difference Result 93226 states and 142169 transitions. [2019-10-13 23:27:41,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:41,472 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 177 [2019-10-13 23:27:41,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:41,756 INFO L225 Difference]: With dead ends: 93226 [2019-10-13 23:27:41,756 INFO L226 Difference]: Without dead ends: 61876 [2019-10-13 23:27:42,200 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:27:42,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61876 states. [2019-10-13 23:27:46,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61876 to 61119. [2019-10-13 23:27:46,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61119 states. [2019-10-13 23:27:47,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61119 states to 61119 states and 87853 transitions. [2019-10-13 23:27:47,118 INFO L78 Accepts]: Start accepts. Automaton has 61119 states and 87853 transitions. Word has length 177 [2019-10-13 23:27:47,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:47,119 INFO L462 AbstractCegarLoop]: Abstraction has 61119 states and 87853 transitions. [2019-10-13 23:27:47,119 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:47,119 INFO L276 IsEmpty]: Start isEmpty. Operand 61119 states and 87853 transitions. [2019-10-13 23:27:47,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-10-13 23:27:47,185 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:47,185 INFO L380 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, 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, 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] [2019-10-13 23:27:47,389 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:47,389 INFO L410 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:47,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:47,390 INFO L82 PathProgramCache]: Analyzing trace with hash 27419066, now seen corresponding path program 1 times [2019-10-13 23:27:47,390 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:47,390 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287265127] [2019-10-13 23:27:47,391 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:47,391 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:47,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:47,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:47,498 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-13 23:27:47,498 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287265127] [2019-10-13 23:27:47,498 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530998534] [2019-10-13 23:27:47,498 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 [2019-10-13 23:27:47,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:47,701 INFO L256 TraceCheckSpWp]: Trace formula consists of 1283 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 23:27:47,706 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:27:47,752 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:27:47,752 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:27:47,904 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-13 23:27:47,905 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:27:47,905 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 6 [2019-10-13 23:27:47,905 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416349774] [2019-10-13 23:27:47,906 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:27:47,906 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:47,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:27:47,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-13 23:27:47,906 INFO L87 Difference]: Start difference. First operand 61119 states and 87853 transitions. Second operand 3 states.