/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--ti--wlcore--wlcore_spi.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 20:16:12,397 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 20:16:12,400 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 20:16:12,425 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 20:16:12,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 20:16:12,427 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 20:16:12,428 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 20:16:12,430 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 20:16:12,431 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 20:16:12,432 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 20:16:12,433 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 20:16:12,434 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 20:16:12,435 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 20:16:12,436 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 20:16:12,437 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 20:16:12,438 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 20:16:12,439 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 20:16:12,440 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 20:16:12,442 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 20:16:12,443 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 20:16:12,445 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 20:16:12,446 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 20:16:12,447 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 20:16:12,448 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 20:16:12,450 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 20:16:12,451 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 20:16:12,451 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 20:16:12,452 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 20:16:12,452 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 20:16:12,453 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 20:16:12,453 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 20:16:12,454 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 20:16:12,455 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 20:16:12,455 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 20:16:12,456 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 20:16:12,457 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 20:16:12,457 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 20:16:12,457 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 20:16:12,458 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 20:16:12,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 20:16:12,459 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 20:16:12,460 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2020-08-21 20:16:12,483 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 20:16:12,483 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 20:16:12,485 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 20:16:12,485 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 20:16:12,485 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 20:16:12,485 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 20:16:12,486 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 20:16:12,486 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 20:16:12,486 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 20:16:12,486 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 20:16:12,486 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 20:16:12,486 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 20:16:12,487 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 20:16:12,487 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 20:16:12,487 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 20:16:12,487 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 20:16:12,487 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 20:16:12,488 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 20:16:12,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 20:16:12,488 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 20:16:12,488 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 20:16:12,488 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 20:16:12,489 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 20:16:12,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 20:16:12,489 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 20:16:12,489 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 20:16:12,489 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-21 20:16:12,490 INFO L138 SettingsManager]: * To the following directory=dump/ Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; [2020-08-21 20:16:12,819 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 20:16:12,830 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 20:16:12,834 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 20:16:12,835 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 20:16:12,836 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 20:16:12,837 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--ti--wlcore--wlcore_spi.ko-entry_point.cil.out.i [2020-08-21 20:16:12,909 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bb934c983/b408364ea675465c85b50408d5408d29/FLAG20b20d88c [2020-08-21 20:16:13,796 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 20:16:13,797 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--ti--wlcore--wlcore_spi.ko-entry_point.cil.out.i [2020-08-21 20:16:13,840 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bb934c983/b408364ea675465c85b50408d5408d29/FLAG20b20d88c [2020-08-21 20:16:13,869 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bb934c983/b408364ea675465c85b50408d5408d29 [2020-08-21 20:16:13,879 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 20:16:13,880 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 20:16:13,881 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 20:16:13,881 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 20:16:13,885 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 20:16:13,886 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 08:16:13" (1/1) ... [2020-08-21 20:16:13,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49f0ea37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:16:13, skipping insertion in model container [2020-08-21 20:16:13,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 08:16:13" (1/1) ... [2020-08-21 20:16:13,897 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 20:16:14,011 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 20:16:15,211 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 20:16:15,228 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 20:16:15,528 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 20:16:15,617 INFO L208 MainTranslator]: Completed translation [2020-08-21 20:16:15,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:16:15 WrapperNode [2020-08-21 20:16:15,618 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 20:16:15,619 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 20:16:15,620 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 20:16:15,620 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 20:16:15,636 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:16:15" (1/1) ... [2020-08-21 20:16:15,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:16:15" (1/1) ... [2020-08-21 20:16:15,706 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:16:15" (1/1) ... [2020-08-21 20:16:15,707 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:16:15" (1/1) ... [2020-08-21 20:16:15,791 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:16:15" (1/1) ... [2020-08-21 20:16:15,801 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:16:15" (1/1) ... [2020-08-21 20:16:15,813 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:16:15" (1/1) ... [2020-08-21 20:16:15,830 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 20:16:15,831 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 20:16:15,831 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 20:16:15,832 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 20:16:15,833 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:16:15" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-21 20:16:15,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 20:16:15,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 20:16:15,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2020-08-21 20:16:15,904 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2020-08-21 20:16:15,904 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2020-08-21 20:16:15,904 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2020-08-21 20:16:15,905 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2020-08-21 20:16:15,906 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2020-08-21 20:16:15,906 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 20:16:15,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2020-08-21 20:16:15,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2020-08-21 20:16:15,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2020-08-21 20:16:15,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ulong [2020-08-21 20:16:15,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2020-08-21 20:16:15,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2020-08-21 20:16:15,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2020-08-21 20:16:15,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_trap [2020-08-21 20:16:15,912 INFO L138 BoogieDeclarations]: Found implementation of procedure to_spi_device [2020-08-21 20:16:15,912 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_set_drvdata [2020-08-21 20:16:15,912 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_get_drvdata [2020-08-21 20:16:15,913 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_unregister_driver [2020-08-21 20:16:15,913 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_message_init [2020-08-21 20:16:15,913 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_message_add_tail [2020-08-21 20:16:15,913 INFO L138 BoogieDeclarations]: Found implementation of procedure wl12xx_spi_reset [2020-08-21 20:16:15,913 INFO L138 BoogieDeclarations]: Found implementation of procedure wl12xx_spi_init [2020-08-21 20:16:15,914 INFO L138 BoogieDeclarations]: Found implementation of procedure wl12xx_spi_read_busy [2020-08-21 20:16:15,914 INFO L138 BoogieDeclarations]: Found implementation of procedure wl12xx_spi_raw_read [2020-08-21 20:16:15,914 INFO L138 BoogieDeclarations]: Found implementation of procedure wl12xx_spi_raw_write [2020-08-21 20:16:15,915 INFO L138 BoogieDeclarations]: Found implementation of procedure wl1271_probe [2020-08-21 20:16:15,915 INFO L138 BoogieDeclarations]: Found implementation of procedure wl1271_remove [2020-08-21 20:16:15,915 INFO L138 BoogieDeclarations]: Found implementation of procedure wl1271_spi_driver_init [2020-08-21 20:16:15,915 INFO L138 BoogieDeclarations]: Found implementation of procedure wl1271_spi_driver_exit [2020-08-21 20:16:15,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize_wl1271_if_operations_2 [2020-08-21 20:16:15,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize_spi_driver_1 [2020-08-21 20:16:15,968 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 20:16:15,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2020-08-21 20:16:15,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_get_intfdata [2020-08-21 20:16:15,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata [2020-08-21 20:16:15,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_put_intf [2020-08-21 20:16:15,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2020-08-21 20:16:15,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_fill_int_urb [2020-08-21 20:16:15,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_fill_bulk_urb [2020-08-21 20:16:15,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2020-08-21 20:16:15,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_get_dev [2020-08-21 20:16:15,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_put_dev [2020-08-21 20:16:15,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_get_interface [2020-08-21 20:16:15,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_put_interface [2020-08-21 20:16:15,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_serial_register [2020-08-21 20:16:15,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_serial_deregister [2020-08-21 20:16:15,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2020-08-21 20:16:15,973 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2020-08-21 20:16:15,973 INFO L138 BoogieDeclarations]: Found implementation of procedure crc7 [2020-08-21 20:16:15,973 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2020-08-21 20:16:15,973 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2020-08-21 20:16:15,973 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_set_drvdata [2020-08-21 20:16:15,973 INFO L138 BoogieDeclarations]: Found implementation of procedure driver_unregister [2020-08-21 20:16:15,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2020-08-21 20:16:15,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_release_2 [2020-08-21 20:16:15,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_setup_2 [2020-08-21 20:16:15,975 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_device_add [2020-08-21 20:16:15,975 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_device_add_data [2020-08-21 20:16:15,976 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_device_add_resources [2020-08-21 20:16:15,976 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_device_alloc [2020-08-21 20:16:15,976 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_device_put [2020-08-21 20:16:15,976 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_device_unregister [2020-08-21 20:16:15,976 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_register_driver [2020-08-21 20:16:15,976 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_setup [2020-08-21 20:16:15,976 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_sync [2020-08-21 20:16:15,977 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2020-08-21 20:16:15,978 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2020-08-21 20:16:15,978 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2020-08-21 20:16:15,978 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-08-21 20:16:15,978 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 20:16:15,979 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2020-08-21 20:16:15,979 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2020-08-21 20:16:15,979 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2020-08-21 20:16:15,979 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2020-08-21 20:16:15,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 20:16:15,979 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2020-08-21 20:16:15,979 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2020-08-21 20:16:15,981 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 20:16:15,981 INFO L130 BoogieDeclarations]: Found specification of procedure driver_unregister [2020-08-21 20:16:15,981 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2020-08-21 20:16:15,981 INFO L130 BoogieDeclarations]: Found specification of procedure dev_set_drvdata [2020-08-21 20:16:15,982 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2020-08-21 20:16:15,982 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2020-08-21 20:16:15,982 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2020-08-21 20:16:15,982 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2020-08-21 20:16:15,982 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2020-08-21 20:16:15,982 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2020-08-21 20:16:15,982 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2020-08-21 20:16:15,983 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 20:16:15,983 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-21 20:16:15,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 20:16:15,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_size_t [2020-08-21 20:16:15,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2020-08-21 20:16:15,983 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 20:16:15,983 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 20:16:15,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 20:16:15,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-08-21 20:16:15,984 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2020-08-21 20:16:15,984 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ulong [2020-08-21 20:16:15,984 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2020-08-21 20:16:15,984 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2020-08-21 20:16:15,984 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_trap [2020-08-21 20:16:15,985 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize_wl1271_if_operations_2 [2020-08-21 20:16:15,985 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize_spi_driver_1 [2020-08-21 20:16:15,985 INFO L130 BoogieDeclarations]: Found specification of procedure crc7 [2020-08-21 20:16:15,985 INFO L130 BoogieDeclarations]: Found specification of procedure to_spi_device [2020-08-21 20:16:15,985 INFO L130 BoogieDeclarations]: Found specification of procedure spi_set_drvdata [2020-08-21 20:16:15,985 INFO L130 BoogieDeclarations]: Found specification of procedure spi_get_drvdata [2020-08-21 20:16:15,985 INFO L130 BoogieDeclarations]: Found specification of procedure spi_register_driver [2020-08-21 20:16:15,986 INFO L130 BoogieDeclarations]: Found specification of procedure spi_unregister_driver [2020-08-21 20:16:15,986 INFO L130 BoogieDeclarations]: Found specification of procedure spi_message_init [2020-08-21 20:16:15,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2020-08-21 20:16:15,986 INFO L130 BoogieDeclarations]: Found specification of procedure spi_message_add_tail [2020-08-21 20:16:15,987 INFO L130 BoogieDeclarations]: Found specification of procedure spi_setup [2020-08-21 20:16:15,987 INFO L130 BoogieDeclarations]: Found specification of procedure spi_sync [2020-08-21 20:16:15,987 INFO L130 BoogieDeclarations]: Found specification of procedure platform_device_unregister [2020-08-21 20:16:15,987 INFO L130 BoogieDeclarations]: Found specification of procedure platform_device_alloc [2020-08-21 20:16:15,988 INFO L130 BoogieDeclarations]: Found specification of procedure platform_device_add_resources [2020-08-21 20:16:15,989 INFO L130 BoogieDeclarations]: Found specification of procedure platform_device_add_data [2020-08-21 20:16:15,989 INFO L130 BoogieDeclarations]: Found specification of procedure platform_device_add [2020-08-21 20:16:15,989 INFO L130 BoogieDeclarations]: Found specification of procedure platform_device_put [2020-08-21 20:16:15,989 INFO L130 BoogieDeclarations]: Found specification of procedure wl12xx_spi_reset [2020-08-21 20:16:15,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 20:16:15,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 20:16:15,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 20:16:15,992 INFO L130 BoogieDeclarations]: Found specification of procedure wl12xx_spi_init [2020-08-21 20:16:15,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 20:16:15,992 INFO L130 BoogieDeclarations]: Found specification of procedure wl12xx_spi_read_busy [2020-08-21 20:16:15,993 INFO L130 BoogieDeclarations]: Found specification of procedure wl12xx_spi_raw_read [2020-08-21 20:16:15,994 INFO L130 BoogieDeclarations]: Found specification of procedure wl12xx_spi_raw_write [2020-08-21 20:16:15,997 INFO L130 BoogieDeclarations]: Found specification of procedure wl1271_probe [2020-08-21 20:16:15,998 INFO L130 BoogieDeclarations]: Found specification of procedure wl1271_remove [2020-08-21 20:16:15,998 INFO L130 BoogieDeclarations]: Found specification of procedure wl1271_spi_driver_init [2020-08-21 20:16:15,998 INFO L130 BoogieDeclarations]: Found specification of procedure wl1271_spi_driver_exit [2020-08-21 20:16:15,998 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2020-08-21 20:16:15,999 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_release_2 [2020-08-21 20:16:15,999 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2020-08-21 20:16:15,999 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_setup_2 [2020-08-21 20:16:15,999 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 20:16:15,999 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2020-08-21 20:16:15,999 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_get_intfdata [2020-08-21 20:16:16,000 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata [2020-08-21 20:16:16,006 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_put_intf [2020-08-21 20:16:16,006 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2020-08-21 20:16:16,006 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_fill_int_urb [2020-08-21 20:16:16,006 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_fill_bulk_urb [2020-08-21 20:16:16,006 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2020-08-21 20:16:16,007 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2020-08-21 20:16:16,007 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_get_dev [2020-08-21 20:16:16,007 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_put_dev [2020-08-21 20:16:16,007 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_get_interface [2020-08-21 20:16:16,007 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_put_interface [2020-08-21 20:16:16,007 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_serial_register [2020-08-21 20:16:16,008 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_serial_deregister [2020-08-21 20:16:16,008 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-08-21 20:16:16,008 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 20:16:16,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 20:16:16,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 20:16:16,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-08-21 20:16:16,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 20:16:16,848 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2020-08-21 20:16:17,587 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2020-08-21 20:16:18,122 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 20:16:18,123 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 20:16:18,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 08:16:18 BoogieIcfgContainer [2020-08-21 20:16:18,139 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 20:16:18,140 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 20:16:18,140 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 20:16:18,145 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 20:16:18,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 08:16:13" (1/3) ... [2020-08-21 20:16:18,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d5f7bb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 08:16:18, skipping insertion in model container [2020-08-21 20:16:18,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:16:15" (2/3) ... [2020-08-21 20:16:18,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d5f7bb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 08:16:18, skipping insertion in model container [2020-08-21 20:16:18,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 08:16:18" (3/3) ... [2020-08-21 20:16:18,149 INFO L109 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--ti--wlcore--wlcore_spi.ko-entry_point.cil.out.i [2020-08-21 20:16:18,159 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 20:16:18,173 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 20:16:18,186 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 20:16:18,212 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 20:16:18,213 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 20:16:18,213 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 20:16:18,213 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 20:16:18,213 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 20:16:18,213 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 20:16:18,213 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 20:16:18,213 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 20:16:18,241 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states. [2020-08-21 20:16:18,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 20:16:18,252 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:16:18,253 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-21 20:16:18,253 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:16:18,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:16:18,259 INFO L82 PathProgramCache]: Analyzing trace with hash -2051707004, now seen corresponding path program 1 times [2020-08-21 20:16:18,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:16:18,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [306995126] [2020-08-21 20:16:18,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:16:18,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:19,185 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:16:19,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:16:19,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:19,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:16:19,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:19,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:16:19,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:19,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 20:16:19,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:19,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 20:16:19,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:19,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 20:16:19,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:19,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 20:16:19,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:19,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:16:19,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:19,413 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 20:16:19,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [306995126] [2020-08-21 20:16:19,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:16:19,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 20:16:19,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886439540] [2020-08-21 20:16:19,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 20:16:19,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:16:19,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 20:16:19,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 20:16:19,441 INFO L87 Difference]: Start difference. First operand 469 states. Second operand 7 states. [2020-08-21 20:16:19,806 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-21 20:16:20,601 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-08-21 20:16:20,950 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-08-21 20:16:27,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:16:27,719 INFO L93 Difference]: Finished difference Result 945 states and 1293 transitions. [2020-08-21 20:16:27,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 20:16:27,721 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-08-21 20:16:27,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:16:27,744 INFO L225 Difference]: With dead ends: 945 [2020-08-21 20:16:27,744 INFO L226 Difference]: Without dead ends: 492 [2020-08-21 20:16:27,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-08-21 20:16:27,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2020-08-21 20:16:27,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 437. [2020-08-21 20:16:27,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2020-08-21 20:16:27,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 559 transitions. [2020-08-21 20:16:27,893 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 559 transitions. Word has length 52 [2020-08-21 20:16:27,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:16:27,894 INFO L479 AbstractCegarLoop]: Abstraction has 437 states and 559 transitions. [2020-08-21 20:16:27,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 20:16:27,894 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 559 transitions. [2020-08-21 20:16:27,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-21 20:16:27,898 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:16:27,899 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-21 20:16:27,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 20:16:27,899 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:16:27,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:16:27,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1503436246, now seen corresponding path program 1 times [2020-08-21 20:16:27,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:16:27,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552293512] [2020-08-21 20:16:27,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:16:27,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:28,300 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:16:28,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:16:28,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:28,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:16:28,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:28,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:16:28,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:28,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 20:16:28,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:28,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 20:16:28,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:28,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 20:16:28,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:28,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 20:16:28,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:28,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:16:28,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:28,497 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-21 20:16:28,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552293512] [2020-08-21 20:16:28,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:16:28,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 20:16:28,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721952386] [2020-08-21 20:16:28,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 20:16:28,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:16:28,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 20:16:28,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 20:16:28,501 INFO L87 Difference]: Start difference. First operand 437 states and 559 transitions. Second operand 6 states. [2020-08-21 20:16:28,775 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-21 20:16:29,583 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-08-21 20:16:30,930 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 20:16:37,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:16:37,377 INFO L93 Difference]: Finished difference Result 1313 states and 1710 transitions. [2020-08-21 20:16:37,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 20:16:37,379 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-08-21 20:16:37,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:16:37,392 INFO L225 Difference]: With dead ends: 1313 [2020-08-21 20:16:37,393 INFO L226 Difference]: Without dead ends: 893 [2020-08-21 20:16:37,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-08-21 20:16:37,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2020-08-21 20:16:37,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 796. [2020-08-21 20:16:37,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 796 states. [2020-08-21 20:16:37,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1025 transitions. [2020-08-21 20:16:37,514 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1025 transitions. Word has length 54 [2020-08-21 20:16:37,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:16:37,514 INFO L479 AbstractCegarLoop]: Abstraction has 796 states and 1025 transitions. [2020-08-21 20:16:37,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 20:16:37,515 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1025 transitions. [2020-08-21 20:16:37,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-21 20:16:37,518 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:16:37,518 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-21 20:16:37,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 20:16:37,518 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:16:37,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:16:37,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1632677837, now seen corresponding path program 1 times [2020-08-21 20:16:37,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:16:37,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61627276] [2020-08-21 20:16:37,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:16:37,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:37,965 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:16:37,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:16:38,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:38,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:16:38,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:38,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:16:38,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:38,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 20:16:38,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:38,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 20:16:38,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:38,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 20:16:38,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:38,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 20:16:38,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:38,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:16:38,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:38,246 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-21 20:16:38,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61627276] [2020-08-21 20:16:38,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:16:38,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 20:16:38,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616166811] [2020-08-21 20:16:38,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 20:16:38,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:16:38,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 20:16:38,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 20:16:38,249 INFO L87 Difference]: Start difference. First operand 796 states and 1025 transitions. Second operand 6 states. [2020-08-21 20:16:38,533 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-21 20:16:38,917 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-08-21 20:16:39,254 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 20:16:45,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:16:45,600 INFO L93 Difference]: Finished difference Result 895 states and 1170 transitions. [2020-08-21 20:16:45,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 20:16:45,601 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-08-21 20:16:45,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:16:45,609 INFO L225 Difference]: With dead ends: 895 [2020-08-21 20:16:45,609 INFO L226 Difference]: Without dead ends: 892 [2020-08-21 20:16:45,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-08-21 20:16:45,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2020-08-21 20:16:45,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 795. [2020-08-21 20:16:45,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 795 states. [2020-08-21 20:16:45,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1023 transitions. [2020-08-21 20:16:45,770 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1023 transitions. Word has length 58 [2020-08-21 20:16:45,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:16:45,771 INFO L479 AbstractCegarLoop]: Abstraction has 795 states and 1023 transitions. [2020-08-21 20:16:45,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 20:16:45,771 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1023 transitions. [2020-08-21 20:16:45,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-21 20:16:45,774 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:16:45,774 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-21 20:16:45,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 20:16:45,774 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:16:45,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:16:45,775 INFO L82 PathProgramCache]: Analyzing trace with hash 926229248, now seen corresponding path program 1 times [2020-08-21 20:16:45,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:16:45,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089227631] [2020-08-21 20:16:45,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:16:45,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:46,211 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:16:46,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:16:46,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:46,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:16:46,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:46,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:16:46,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:46,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 20:16:46,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:46,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 20:16:46,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:46,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 20:16:46,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:46,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 20:16:46,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:46,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:16:46,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:46,411 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-21 20:16:46,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089227631] [2020-08-21 20:16:46,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:16:46,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 20:16:46,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502904690] [2020-08-21 20:16:46,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 20:16:46,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:16:46,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 20:16:46,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 20:16:46,415 INFO L87 Difference]: Start difference. First operand 795 states and 1023 transitions. Second operand 6 states. [2020-08-21 20:16:46,690 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-21 20:16:47,068 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-08-21 20:16:47,404 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 20:16:54,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:16:54,286 INFO L93 Difference]: Finished difference Result 894 states and 1168 transitions. [2020-08-21 20:16:54,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 20:16:54,287 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-08-21 20:16:54,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:16:54,295 INFO L225 Difference]: With dead ends: 894 [2020-08-21 20:16:54,296 INFO L226 Difference]: Without dead ends: 891 [2020-08-21 20:16:54,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-08-21 20:16:54,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2020-08-21 20:16:54,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 794. [2020-08-21 20:16:54,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 794 states. [2020-08-21 20:16:54,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1021 transitions. [2020-08-21 20:16:54,476 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1021 transitions. Word has length 59 [2020-08-21 20:16:54,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:16:54,479 INFO L479 AbstractCegarLoop]: Abstraction has 794 states and 1021 transitions. [2020-08-21 20:16:54,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 20:16:54,480 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1021 transitions. [2020-08-21 20:16:54,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-21 20:16:54,482 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:16:54,482 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-21 20:16:54,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 20:16:54,483 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:16:54,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:16:54,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1352024874, now seen corresponding path program 1 times [2020-08-21 20:16:54,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:16:54,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304757646] [2020-08-21 20:16:54,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:16:54,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:54,940 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:16:54,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:16:54,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:54,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:16:54,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:55,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:16:55,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:55,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 20:16:55,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:55,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 20:16:55,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:55,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 20:16:55,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:55,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 20:16:55,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:55,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:16:55,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:16:55,089 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-21 20:16:55,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304757646] [2020-08-21 20:16:55,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:16:55,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 20:16:55,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996823773] [2020-08-21 20:16:55,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 20:16:55,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:16:55,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 20:16:55,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 20:16:55,094 INFO L87 Difference]: Start difference. First operand 794 states and 1021 transitions. Second operand 6 states. [2020-08-21 20:16:55,366 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-21 20:16:55,727 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-08-21 20:16:56,059 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 20:17:03,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:17:03,019 INFO L93 Difference]: Finished difference Result 893 states and 1166 transitions. [2020-08-21 20:17:03,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 20:17:03,021 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-08-21 20:17:03,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:17:03,027 INFO L225 Difference]: With dead ends: 893 [2020-08-21 20:17:03,027 INFO L226 Difference]: Without dead ends: 890 [2020-08-21 20:17:03,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-08-21 20:17:03,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2020-08-21 20:17:03,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 793. [2020-08-21 20:17:03,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 793 states. [2020-08-21 20:17:03,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1019 transitions. [2020-08-21 20:17:03,119 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1019 transitions. Word has length 60 [2020-08-21 20:17:03,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:17:03,119 INFO L479 AbstractCegarLoop]: Abstraction has 793 states and 1019 transitions. [2020-08-21 20:17:03,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 20:17:03,120 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1019 transitions. [2020-08-21 20:17:03,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 20:17:03,121 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:17:03,121 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-21 20:17:03,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 20:17:03,122 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:17:03,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:17:03,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1036546243, now seen corresponding path program 1 times [2020-08-21 20:17:03,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:17:03,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922826939] [2020-08-21 20:17:03,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:17:03,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:17:03,472 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:17:03,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:17:03,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:17:03,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:17:03,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:17:03,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:17:03,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:17:03,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 20:17:03,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:17:03,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 20:17:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:17:03,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 20:17:03,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:17:03,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 20:17:03,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:17:03,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:17:03,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:17:03,704 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-21 20:17:03,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922826939] [2020-08-21 20:17:03,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:17:03,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 20:17:03,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410209098] [2020-08-21 20:17:03,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 20:17:03,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:17:03,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 20:17:03,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 20:17:03,706 INFO L87 Difference]: Start difference. First operand 793 states and 1019 transitions. Second operand 6 states. [2020-08-21 20:17:03,983 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-21 20:17:04,342 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-08-21 20:17:04,675 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 20:17:12,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:17:12,904 INFO L93 Difference]: Finished difference Result 892 states and 1164 transitions. [2020-08-21 20:17:12,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 20:17:12,906 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-08-21 20:17:12,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:17:12,913 INFO L225 Difference]: With dead ends: 892 [2020-08-21 20:17:12,913 INFO L226 Difference]: Without dead ends: 889 [2020-08-21 20:17:12,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-08-21 20:17:12,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2020-08-21 20:17:12,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 792. [2020-08-21 20:17:12,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 792 states. [2020-08-21 20:17:13,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1017 transitions. [2020-08-21 20:17:13,001 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1017 transitions. Word has length 61 [2020-08-21 20:17:13,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:17:13,001 INFO L479 AbstractCegarLoop]: Abstraction has 792 states and 1017 transitions. [2020-08-21 20:17:13,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 20:17:13,002 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1017 transitions. [2020-08-21 20:17:13,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-21 20:17:13,003 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:17:13,004 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-21 20:17:13,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 20:17:13,004 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:17:13,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:17:13,004 INFO L82 PathProgramCache]: Analyzing trace with hash 2067811705, now seen corresponding path program 1 times [2020-08-21 20:17:13,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:17:13,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045854503] [2020-08-21 20:17:13,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:17:13,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:17:13,365 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 20:17:13,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:17:13,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:17:13,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:17:13,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:17:13,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:17:13,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:17:13,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 20:17:13,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:17:13,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 20:17:13,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:17:13,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 20:17:13,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:17:13,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 20:17:13,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:17:13,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:17:13,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:17:13,491 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-21 20:17:13,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045854503] [2020-08-21 20:17:13,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:17:13,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 20:17:13,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313961071] [2020-08-21 20:17:13,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 20:17:13,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:17:13,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 20:17:13,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 20:17:13,494 INFO L87 Difference]: Start difference. First operand 792 states and 1017 transitions. Second operand 6 states. [2020-08-21 20:17:13,781 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-21 20:17:14,159 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-08-21 20:17:14,507 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 189