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.05.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 23:27:17,967 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 23:27:17,970 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 23:27:17,988 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 23:27:17,988 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 23:27:17,990 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 23:27:17,992 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 23:27:18,002 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 23:27:18,007 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 23:27:18,009 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 23:27:18,011 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 23:27:18,012 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 23:27:18,012 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 23:27:18,014 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 23:27:18,016 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 23:27:18,018 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 23:27:18,019 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 23:27:18,020 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 23:27:18,021 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 23:27:18,025 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 23:27:18,029 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 23:27:18,032 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 23:27:18,034 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 23:27:18,035 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 23:27:18,037 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 23:27:18,037 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 23:27:18,037 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 23:27:18,039 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 23:27:18,040 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 23:27:18,042 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 23:27:18,042 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 23:27:18,044 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 23:27:18,045 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 23:27:18,045 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 23:27:18,047 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 23:27:18,047 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 23:27:18,048 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 23:27:18,048 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 23:27:18,048 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 23:27:18,049 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 23:27:18,050 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 23:27:18,051 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 23:27:18,070 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 23:27:18,071 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 23:27:18,072 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 23:27:18,077 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 23:27:18,077 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 23:27:18,077 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 23:27:18,077 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 23:27:18,078 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 23:27:18,078 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 23:27:18,078 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 23:27:18,079 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 23:27:18,080 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 23:27:18,080 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 23:27:18,080 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 23:27:18,080 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 23:27:18,080 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 23:27:18,081 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 23:27:18,081 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 23:27:18,081 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 23:27:18,082 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 23:27:18,082 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 23:27:18,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:27:18,082 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 23:27:18,082 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 23:27:18,083 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 23:27:18,083 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 23:27:18,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 23:27:18,083 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 23:27:18,083 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 23:27:18,386 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 23:27:18,404 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 23:27:18,407 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 23:27:18,408 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 23:27:18,409 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 23:27:18,410 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/transmitter.05.cil.c [2019-10-13 23:27:18,489 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a6a6188b/383d377963c240fc8d5b079a52b9f0b6/FLAGad98a9975 [2019-10-13 23:27:19,039 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 23:27:19,040 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/transmitter.05.cil.c [2019-10-13 23:27:19,051 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a6a6188b/383d377963c240fc8d5b079a52b9f0b6/FLAGad98a9975 [2019-10-13 23:27:19,373 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a6a6188b/383d377963c240fc8d5b079a52b9f0b6 [2019-10-13 23:27:19,385 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 23:27:19,387 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 23:27:19,388 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 23:27:19,388 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 23:27:19,392 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 23:27:19,393 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:27:19" (1/1) ... [2019-10-13 23:27:19,396 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@349bc271 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 23:27:19,396 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:27:19" (1/1) ... [2019-10-13 23:27:19,404 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 23:27:19,460 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 23:27:19,748 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:27:19,758 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 23:27:19,897 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:27:19,919 INFO L192 MainTranslator]: Completed translation [2019-10-13 23:27:19,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:19 WrapperNode [2019-10-13 23:27:19,920 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 23:27:19,921 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 23:27:19,921 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 23:27:19,921 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 23:27:19,935 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 23:27:19,935 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 23:27:19,944 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 23:27:19,945 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 23:27:19,958 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 23:27:19,975 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 23:27:19,979 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 23:27:19,983 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 23:27:19,984 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 23:27:19,984 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 23:27:19,984 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 23:27:19,985 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 23:27:20,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 23:27:20,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 23:27:20,055 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2019-10-13 23:27:20,055 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2019-10-13 23:27:20,055 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2019-10-13 23:27:20,055 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2019-10-13 23:27:20,055 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2019-10-13 23:27:20,056 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit4 [2019-10-13 23:27:20,056 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit5 [2019-10-13 23:27:20,056 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2019-10-13 23:27:20,056 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2019-10-13 23:27:20,056 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2019-10-13 23:27:20,057 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2019-10-13 23:27:20,057 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit4_triggered [2019-10-13 23:27:20,057 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit5_triggered [2019-10-13 23:27:20,057 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2019-10-13 23:27:20,057 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2019-10-13 23:27:20,057 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2019-10-13 23:27:20,057 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-10-13 23:27:20,058 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2019-10-13 23:27:20,058 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2019-10-13 23:27:20,058 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2019-10-13 23:27:20,058 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2019-10-13 23:27:20,058 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2019-10-13 23:27:20,058 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2019-10-13 23:27:20,059 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2019-10-13 23:27:20,059 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2019-10-13 23:27:20,059 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2019-10-13 23:27:20,059 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 23:27:20,059 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 23:27:20,059 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 23:27:20,059 INFO L130 BoogieDeclarations]: Found specification of procedure error [2019-10-13 23:27:20,060 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2019-10-13 23:27:20,060 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2019-10-13 23:27:20,060 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2019-10-13 23:27:20,060 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2019-10-13 23:27:20,060 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit4_triggered [2019-10-13 23:27:20,060 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit5_triggered [2019-10-13 23:27:20,060 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2019-10-13 23:27:20,060 INFO L130 BoogieDeclarations]: Found specification of procedure master [2019-10-13 23:27:20,061 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2019-10-13 23:27:20,061 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2019-10-13 23:27:20,061 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2019-10-13 23:27:20,061 INFO L130 BoogieDeclarations]: Found specification of procedure transmit4 [2019-10-13 23:27:20,061 INFO L130 BoogieDeclarations]: Found specification of procedure transmit5 [2019-10-13 23:27:20,061 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2019-10-13 23:27:20,061 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2019-10-13 23:27:20,061 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2019-10-13 23:27:20,061 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-10-13 23:27:20,062 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2019-10-13 23:27:20,062 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2019-10-13 23:27:20,062 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2019-10-13 23:27:20,062 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2019-10-13 23:27:20,062 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2019-10-13 23:27:20,062 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2019-10-13 23:27:20,062 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2019-10-13 23:27:20,063 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2019-10-13 23:27:20,063 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 23:27:20,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 23:27:20,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 23:27:21,425 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 23:27:21,425 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-10-13 23:27:21,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:27:21 BoogieIcfgContainer [2019-10-13 23:27:21,428 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 23:27:21,429 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 23:27:21,429 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 23:27:21,433 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 23:27:21,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:27:19" (1/3) ... [2019-10-13 23:27:21,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@791e56db 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 23:27:21,434 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 23:27:21,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@791e56db 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 23:27:21,435 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 23:27:21,437 INFO L109 eAbstractionObserver]: Analyzing ICFG transmitter.05.cil.c [2019-10-13 23:27:21,447 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 23:27:21,457 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 23:27:21,468 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 23:27:21,494 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 23:27:21,494 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 23:27:21,494 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 23:27:21,495 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 23:27:21,495 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 23:27:21,495 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 23:27:21,495 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 23:27:21,496 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 23:27:21,519 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states. [2019-10-13 23:27:21,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-13 23:27:21,529 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:21,529 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] [2019-10-13 23:27:21,531 INFO L410 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:21,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:21,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1812036435, now seen corresponding path program 1 times [2019-10-13 23:27:21,542 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:21,543 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492877244] [2019-10-13 23:27:21,543 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:21,543 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:21,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:21,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:21,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:27:21,992 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492877244] [2019-10-13 23:27:21,994 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:21,994 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 23:27:21,995 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404836621] [2019-10-13 23:27:22,003 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:22,004 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:22,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:22,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:27:22,026 INFO L87 Difference]: Start difference. First operand 174 states. Second operand 4 states. [2019-10-13 23:27:22,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:22,554 INFO L93 Difference]: Finished difference Result 481 states and 669 transitions. [2019-10-13 23:27:22,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:22,556 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2019-10-13 23:27:22,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:22,572 INFO L225 Difference]: With dead ends: 481 [2019-10-13 23:27:22,573 INFO L226 Difference]: Without dead ends: 311 [2019-10-13 23:27:22,578 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 23:27:22,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2019-10-13 23:27:22,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 307. [2019-10-13 23:27:22,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2019-10-13 23:27:22,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 397 transitions. [2019-10-13 23:27:22,714 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 397 transitions. Word has length 88 [2019-10-13 23:27:22,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:22,715 INFO L462 AbstractCegarLoop]: Abstraction has 307 states and 397 transitions. [2019-10-13 23:27:22,715 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:22,715 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 397 transitions. [2019-10-13 23:27:22,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-13 23:27:22,727 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:22,727 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] [2019-10-13 23:27:22,728 INFO L410 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:22,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:22,729 INFO L82 PathProgramCache]: Analyzing trace with hash -2105288044, now seen corresponding path program 1 times [2019-10-13 23:27:22,730 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:22,730 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983686228] [2019-10-13 23:27:22,730 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:22,731 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:22,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:22,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:22,937 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 23:27:22,938 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983686228] [2019-10-13 23:27:22,939 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:22,939 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 23:27:22,939 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038792399] [2019-10-13 23:27:22,943 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:22,944 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:22,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:22,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:27:22,945 INFO L87 Difference]: Start difference. First operand 307 states and 397 transitions. Second operand 4 states. [2019-10-13 23:27:23,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:23,328 INFO L93 Difference]: Finished difference Result 880 states and 1201 transitions. [2019-10-13 23:27:23,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:23,331 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2019-10-13 23:27:23,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:23,343 INFO L225 Difference]: With dead ends: 880 [2019-10-13 23:27:23,343 INFO L226 Difference]: Without dead ends: 589 [2019-10-13 23:27:23,347 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 23:27:23,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2019-10-13 23:27:23,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 584. [2019-10-13 23:27:23,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2019-10-13 23:27:23,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 752 transitions. [2019-10-13 23:27:23,424 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 752 transitions. Word has length 88 [2019-10-13 23:27:23,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:23,424 INFO L462 AbstractCegarLoop]: Abstraction has 584 states and 752 transitions. [2019-10-13 23:27:23,425 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:23,425 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 752 transitions. [2019-10-13 23:27:23,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-13 23:27:23,430 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:23,430 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] [2019-10-13 23:27:23,431 INFO L410 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:23,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:23,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1048031859, now seen corresponding path program 1 times [2019-10-13 23:27:23,431 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:23,432 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942421628] [2019-10-13 23:27:23,432 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:23,432 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:23,432 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:23,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:23,609 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 23:27:23,609 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942421628] [2019-10-13 23:27:23,609 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:23,610 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 23:27:23,610 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448305260] [2019-10-13 23:27:23,613 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:23,613 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:23,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:23,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:27:23,614 INFO L87 Difference]: Start difference. First operand 584 states and 752 transitions. Second operand 4 states. [2019-10-13 23:27:23,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:23,920 INFO L93 Difference]: Finished difference Result 1703 states and 2316 transitions. [2019-10-13 23:27:23,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:23,921 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2019-10-13 23:27:23,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:23,929 INFO L225 Difference]: With dead ends: 1703 [2019-10-13 23:27:23,930 INFO L226 Difference]: Without dead ends: 1135 [2019-10-13 23:27:23,933 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 23:27:23,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2019-10-13 23:27:23,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 1128. [2019-10-13 23:27:23,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1128 states. [2019-10-13 23:27:24,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1446 transitions. [2019-10-13 23:27:24,003 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1446 transitions. Word has length 88 [2019-10-13 23:27:24,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:24,004 INFO L462 AbstractCegarLoop]: Abstraction has 1128 states and 1446 transitions. [2019-10-13 23:27:24,004 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:24,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1446 transitions. [2019-10-13 23:27:24,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-13 23:27:24,005 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:24,006 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] [2019-10-13 23:27:24,006 INFO L410 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:24,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:24,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1052809356, now seen corresponding path program 1 times [2019-10-13 23:27:24,007 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:24,007 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54727695] [2019-10-13 23:27:24,007 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:24,007 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:24,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:24,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:24,089 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 23:27:24,090 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54727695] [2019-10-13 23:27:24,090 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:24,090 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 23:27:24,090 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116169066] [2019-10-13 23:27:24,091 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:24,091 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:24,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:24,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:27:24,092 INFO L87 Difference]: Start difference. First operand 1128 states and 1446 transitions. Second operand 4 states. [2019-10-13 23:27:24,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:24,500 INFO L93 Difference]: Finished difference Result 3319 states and 4508 transitions. [2019-10-13 23:27:24,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:24,501 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2019-10-13 23:27:24,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:24,515 INFO L225 Difference]: With dead ends: 3319 [2019-10-13 23:27:24,515 INFO L226 Difference]: Without dead ends: 2207 [2019-10-13 23:27:24,521 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 23:27:24,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2019-10-13 23:27:24,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 2196. [2019-10-13 23:27:24,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2196 states. [2019-10-13 23:27:24,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 2808 transitions. [2019-10-13 23:27:24,643 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 2808 transitions. Word has length 88 [2019-10-13 23:27:24,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:24,644 INFO L462 AbstractCegarLoop]: Abstraction has 2196 states and 2808 transitions. [2019-10-13 23:27:24,644 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:24,644 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 2808 transitions. [2019-10-13 23:27:24,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-13 23:27:24,645 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:24,645 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] [2019-10-13 23:27:24,646 INFO L410 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:24,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:24,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1967055251, now seen corresponding path program 1 times [2019-10-13 23:27:24,646 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:24,647 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250701637] [2019-10-13 23:27:24,647 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:24,647 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:24,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:24,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:24,717 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 23:27:24,718 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250701637] [2019-10-13 23:27:24,718 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:24,718 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 23:27:24,718 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343855645] [2019-10-13 23:27:24,719 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:27:24,719 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:24,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:27:24,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:27:24,720 INFO L87 Difference]: Start difference. First operand 2196 states and 2808 transitions. Second operand 3 states. [2019-10-13 23:27:24,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:24,995 INFO L93 Difference]: Finished difference Result 6504 states and 8979 transitions. [2019-10-13 23:27:24,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:27:24,995 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 88 [2019-10-13 23:27:24,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:25,023 INFO L225 Difference]: With dead ends: 6504 [2019-10-13 23:27:25,023 INFO L226 Difference]: Without dead ends: 4324 [2019-10-13 23:27:25,038 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 23:27:25,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4324 states. [2019-10-13 23:27:25,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4324 to 4324. [2019-10-13 23:27:25,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4324 states. [2019-10-13 23:27:25,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4324 states to 4324 states and 5835 transitions. [2019-10-13 23:27:25,298 INFO L78 Accepts]: Start accepts. Automaton has 4324 states and 5835 transitions. Word has length 88 [2019-10-13 23:27:25,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:25,298 INFO L462 AbstractCegarLoop]: Abstraction has 4324 states and 5835 transitions. [2019-10-13 23:27:25,299 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:27:25,299 INFO L276 IsEmpty]: Start isEmpty. Operand 4324 states and 5835 transitions. [2019-10-13 23:27:25,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-13 23:27:25,303 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:25,303 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 23:27:25,303 INFO L410 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:25,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:25,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1325517121, now seen corresponding path program 1 times [2019-10-13 23:27:25,304 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:25,304 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846525054] [2019-10-13 23:27:25,304 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:25,304 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:25,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:25,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:25,427 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 23:27:25,427 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846525054] [2019-10-13 23:27:25,428 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:25,428 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 23:27:25,429 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341144974] [2019-10-13 23:27:25,430 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:25,430 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:25,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:25,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:27:25,430 INFO L87 Difference]: Start difference. First operand 4324 states and 5835 transitions. Second operand 4 states. [2019-10-13 23:27:25,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:25,968 INFO L93 Difference]: Finished difference Result 13527 states and 18987 transitions. [2019-10-13 23:27:25,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:25,970 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2019-10-13 23:27:25,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:26,109 INFO L225 Difference]: With dead ends: 13527 [2019-10-13 23:27:26,110 INFO L226 Difference]: Without dead ends: 9220 [2019-10-13 23:27:26,140 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 23:27:26,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9220 states. [2019-10-13 23:27:26,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9220 to 7022. [2019-10-13 23:27:26,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7022 states. [2019-10-13 23:27:26,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7022 states to 7022 states and 9784 transitions. [2019-10-13 23:27:26,764 INFO L78 Accepts]: Start accepts. Automaton has 7022 states and 9784 transitions. Word has length 105 [2019-10-13 23:27:26,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:26,767 INFO L462 AbstractCegarLoop]: Abstraction has 7022 states and 9784 transitions. [2019-10-13 23:27:26,767 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:26,767 INFO L276 IsEmpty]: Start isEmpty. Operand 7022 states and 9784 transitions. [2019-10-13 23:27:26,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-13 23:27:26,787 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:26,788 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:27:26,788 INFO L410 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:26,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:26,789 INFO L82 PathProgramCache]: Analyzing trace with hash 588539568, now seen corresponding path program 1 times [2019-10-13 23:27:26,789 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:26,789 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624611754] [2019-10-13 23:27:26,789 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:26,789 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:26,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:26,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:26,905 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-13 23:27:26,905 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624611754] [2019-10-13 23:27:26,906 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:26,906 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 23:27:26,906 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917334219] [2019-10-13 23:27:26,907 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:27:26,907 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:26,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:27:26,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:27:26,908 INFO L87 Difference]: Start difference. First operand 7022 states and 9784 transitions. Second operand 3 states. [2019-10-13 23:27:27,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:27,592 INFO L93 Difference]: Finished difference Result 19205 states and 27385 transitions. [2019-10-13 23:27:27,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:27:27,593 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 160 [2019-10-13 23:27:27,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:27,663 INFO L225 Difference]: With dead ends: 19205 [2019-10-13 23:27:27,663 INFO L226 Difference]: Without dead ends: 12200 [2019-10-13 23:27:27,715 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 23:27:27,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12200 states. [2019-10-13 23:27:28,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12200 to 9310. [2019-10-13 23:27:28,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9310 states. [2019-10-13 23:27:28,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9310 states to 9310 states and 13043 transitions. [2019-10-13 23:27:28,498 INFO L78 Accepts]: Start accepts. Automaton has 9310 states and 13043 transitions. Word has length 160 [2019-10-13 23:27:28,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:28,499 INFO L462 AbstractCegarLoop]: Abstraction has 9310 states and 13043 transitions. [2019-10-13 23:27:28,499 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:27:28,499 INFO L276 IsEmpty]: Start isEmpty. Operand 9310 states and 13043 transitions. [2019-10-13 23:27:28,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-13 23:27:28,517 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:28,518 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:27:28,518 INFO L410 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:28,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:28,519 INFO L82 PathProgramCache]: Analyzing trace with hash -2106392766, now seen corresponding path program 1 times [2019-10-13 23:27:28,519 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:28,519 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739028638] [2019-10-13 23:27:28,520 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:28,520 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:28,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:28,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:28,657 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-10-13 23:27:28,657 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739028638] [2019-10-13 23:27:28,658 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16639395] [2019-10-13 23:27:28,658 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 23:27:28,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:28,831 INFO L256 TraceCheckSpWp]: Trace formula consists of 1076 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 23:27:28,844 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:27:28,892 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 23:27:28,892 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:27:29,072 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-10-13 23:27:29,073 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:27:29,073 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 7 [2019-10-13 23:27:29,073 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114086459] [2019-10-13 23:27:29,074 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:29,075 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:29,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:29,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:27:29,075 INFO L87 Difference]: Start difference. First operand 9310 states and 13043 transitions. Second operand 4 states. [2019-10-13 23:27:30,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:30,203 INFO L93 Difference]: Finished difference Result 27634 states and 41625 transitions. [2019-10-13 23:27:30,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:30,203 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 161 [2019-10-13 23:27:30,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:30,297 INFO L225 Difference]: With dead ends: 27634 [2019-10-13 23:27:30,297 INFO L226 Difference]: Without dead ends: 18340 [2019-10-13 23:27:30,368 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 323 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 23:27:30,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18340 states. [2019-10-13 23:27:32,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18340 to 18191. [2019-10-13 23:27:32,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18191 states. [2019-10-13 23:27:32,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18191 states to 18191 states and 25553 transitions. [2019-10-13 23:27:32,295 INFO L78 Accepts]: Start accepts. Automaton has 18191 states and 25553 transitions. Word has length 161 [2019-10-13 23:27:32,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:32,297 INFO L462 AbstractCegarLoop]: Abstraction has 18191 states and 25553 transitions. [2019-10-13 23:27:32,297 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:32,297 INFO L276 IsEmpty]: Start isEmpty. Operand 18191 states and 25553 transitions. [2019-10-13 23:27:32,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-10-13 23:27:32,332 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:32,332 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:27:32,536 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:32,537 INFO L410 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:32,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:32,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1392794045, now seen corresponding path program 1 times [2019-10-13 23:27:32,538 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:32,538 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491877777] [2019-10-13 23:27:32,539 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:32,539 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:32,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:32,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:32,626 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-13 23:27:32,626 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491877777] [2019-10-13 23:27:32,626 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162959335] [2019-10-13 23:27:32,627 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 23:27:32,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:32,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 1120 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 23:27:32,811 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:27:32,869 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:27:32,869 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:27:33,028 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-13 23:27:33,028 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:27:33,029 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 6 [2019-10-13 23:27:33,029 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306465376] [2019-10-13 23:27:33,030 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:27:33,030 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:33,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:27:33,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-13 23:27:33,030 INFO L87 Difference]: Start difference. First operand 18191 states and 25553 transitions. Second operand 3 states. [2019-10-13 23:27:34,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:34,082 INFO L93 Difference]: Finished difference Result 33850 states and 49015 transitions. [2019-10-13 23:27:34,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:27:34,082 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 165 [2019-10-13 23:27:34,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:34,194 INFO L225 Difference]: With dead ends: 33850 [2019-10-13 23:27:34,194 INFO L226 Difference]: Without dead ends: 24967 [2019-10-13 23:27:34,279 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-13 23:27:34,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24967 states. [2019-10-13 23:27:36,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24967 to 22495. [2019-10-13 23:27:36,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22495 states. [2019-10-13 23:27:36,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22495 states to 22495 states and 31653 transitions. [2019-10-13 23:27:36,811 INFO L78 Accepts]: Start accepts. Automaton has 22495 states and 31653 transitions. Word has length 165 [2019-10-13 23:27:36,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:36,811 INFO L462 AbstractCegarLoop]: Abstraction has 22495 states and 31653 transitions. [2019-10-13 23:27:36,811 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:27:36,811 INFO L276 IsEmpty]: Start isEmpty. Operand 22495 states and 31653 transitions. [2019-10-13 23:27:36,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-13 23:27:36,853 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:36,854 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:27:37,058 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:37,059 INFO L410 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:37,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:37,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1514414118, now seen corresponding path program 1 times [2019-10-13 23:27:37,060 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:37,060 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152329310] [2019-10-13 23:27:37,061 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:37,061 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:37,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:37,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:37,138 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-13 23:27:37,139 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152329310] [2019-10-13 23:27:37,139 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:37,139 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 23:27:37,139 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567778318] [2019-10-13 23:27:37,140 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:27:37,140 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:37,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:27:37,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:27:37,140 INFO L87 Difference]: Start difference. First operand 22495 states and 31653 transitions. Second operand 3 states. [2019-10-13 23:27:39,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:39,019 INFO L93 Difference]: Finished difference Result 59820 states and 87588 transitions. [2019-10-13 23:27:39,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:27:39,019 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 161 [2019-10-13 23:27:39,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:39,153 INFO L225 Difference]: With dead ends: 59820 [2019-10-13 23:27:39,154 INFO L226 Difference]: Without dead ends: 37342 [2019-10-13 23:27:39,342 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 23:27:39,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37342 states. [2019-10-13 23:27:40,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37342 to 34551. [2019-10-13 23:27:40,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34551 states. [2019-10-13 23:27:42,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34551 states to 34551 states and 48759 transitions. [2019-10-13 23:27:42,673 INFO L78 Accepts]: Start accepts. Automaton has 34551 states and 48759 transitions. Word has length 161 [2019-10-13 23:27:42,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:42,674 INFO L462 AbstractCegarLoop]: Abstraction has 34551 states and 48759 transitions. [2019-10-13 23:27:42,674 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:27:42,674 INFO L276 IsEmpty]: Start isEmpty. Operand 34551 states and 48759 transitions. [2019-10-13 23:27:42,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-13 23:27:42,707 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:42,707 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:27:42,707 INFO L410 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:42,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:42,708 INFO L82 PathProgramCache]: Analyzing trace with hash -31282744, now seen corresponding path program 1 times [2019-10-13 23:27:42,708 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:42,708 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433466845] [2019-10-13 23:27:42,708 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:42,708 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:42,709 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:42,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:42,827 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-10-13 23:27:42,827 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433466845] [2019-10-13 23:27:42,828 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:42,828 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 23:27:42,828 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180301002] [2019-10-13 23:27:42,829 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:42,829 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:42,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:42,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:27:42,829 INFO L87 Difference]: Start difference. First operand 34551 states and 48759 transitions. Second operand 4 states. [2019-10-13 23:27:44,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:44,666 INFO L93 Difference]: Finished difference Result 75837 states and 107035 transitions. [2019-10-13 23:27:44,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:44,667 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 162 [2019-10-13 23:27:44,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:44,782 INFO L225 Difference]: With dead ends: 75837 [2019-10-13 23:27:44,782 INFO L226 Difference]: Without dead ends: 41303 [2019-10-13 23:27:44,974 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 23:27:45,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41303 states. [2019-10-13 23:27:46,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41303 to 41239. [2019-10-13 23:27:46,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41239 states. [2019-10-13 23:27:46,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41239 states to 41239 states and 56093 transitions. [2019-10-13 23:27:46,913 INFO L78 Accepts]: Start accepts. Automaton has 41239 states and 56093 transitions. Word has length 162 [2019-10-13 23:27:46,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:46,913 INFO L462 AbstractCegarLoop]: Abstraction has 41239 states and 56093 transitions. [2019-10-13 23:27:46,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:46,914 INFO L276 IsEmpty]: Start isEmpty. Operand 41239 states and 56093 transitions. [2019-10-13 23:27:46,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-13 23:27:46,939 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:46,940 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:27:46,940 INFO L410 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:46,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:46,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1292019503, now seen corresponding path program 1 times [2019-10-13 23:27:46,941 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:46,941 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478100477] [2019-10-13 23:27:46,941 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:46,941 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:46,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:46,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:47,101 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-13 23:27:47,101 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478100477] [2019-10-13 23:27:47,101 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:47,101 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-10-13 23:27:47,102 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472275701] [2019-10-13 23:27:47,103 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 23:27:47,103 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:47,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 23:27:47,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-13 23:27:47,104 INFO L87 Difference]: Start difference. First operand 41239 states and 56093 transitions. Second operand 9 states.