/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=WIDEST --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 22:41:32,969 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 22:41:32,971 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 22:41:33,003 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 22:41:33,004 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 22:41:33,013 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 22:41:33,015 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 22:41:33,019 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 22:41:33,021 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 22:41:33,024 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 22:41:33,025 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 22:41:33,026 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 22:41:33,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 22:41:33,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 22:41:33,031 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 22:41:33,033 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 22:41:33,034 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 22:41:33,036 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 22:41:33,037 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 22:41:33,045 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 22:41:33,047 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 22:41:33,048 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 22:41:33,049 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 22:41:33,049 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 22:41:33,061 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 22:41:33,061 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 22:41:33,064 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 22:41:33,065 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 22:41:33,065 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 22:41:33,068 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 22:41:33,068 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 22:41:33,069 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 22:41:33,069 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 22:41:33,070 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 22:41:33,075 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 22:41:33,075 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 22:41:33,076 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 22:41:33,076 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 22:41:33,077 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 22:41:33,077 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 22:41:33,080 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 22:41:33,081 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 22:41:33,123 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 22:41:33,123 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 22:41:33,126 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 22:41:33,126 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 22:41:33,127 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 22:41:33,127 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 22:41:33,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 22:41:33,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 22:41:33,127 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 22:41:33,128 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 22:41:33,128 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 22:41:33,128 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 22:41:33,128 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 22:41:33,128 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 22:41:33,128 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 22:41:33,129 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 22:41:33,130 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 22:41:33,130 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 22:41:33,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 22:41:33,130 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 22:41:33,131 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 22:41:33,131 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 22:41:33,131 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 22:41:33,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 22:41:33,132 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 22:41:33,132 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 22:41:33,132 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-21 22:41:33,132 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=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; [2020-08-21 22:41:33,459 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 22:41:33,475 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 22:41:33,479 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 22:41:33,481 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 22:41:33,482 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 22:41:33,483 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--ti--wlcore--wlcore_spi.ko-entry_point.cil.out.i [2020-08-21 22:41:33,562 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f0dbe760e/a19cd26039d348f7b68621d5d3a4195d/FLAG843644ee7 [2020-08-21 22:41:34,359 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 22:41:34,359 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--ti--wlcore--wlcore_spi.ko-entry_point.cil.out.i [2020-08-21 22:41:34,413 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f0dbe760e/a19cd26039d348f7b68621d5d3a4195d/FLAG843644ee7 [2020-08-21 22:41:34,868 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f0dbe760e/a19cd26039d348f7b68621d5d3a4195d [2020-08-21 22:41:34,877 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 22:41:34,879 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 22:41:34,880 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 22:41:34,880 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 22:41:34,884 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 22:41:34,885 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:41:34" (1/1) ... [2020-08-21 22:41:34,888 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a4a5394 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:41:34, skipping insertion in model container [2020-08-21 22:41:34,888 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:41:34" (1/1) ... [2020-08-21 22:41:34,896 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 22:41:35,004 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 22:41:36,318 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:41:36,344 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 22:41:36,736 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:41:36,809 INFO L208 MainTranslator]: Completed translation [2020-08-21 22:41:36,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:41:36 WrapperNode [2020-08-21 22:41:36,810 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 22:41:36,811 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 22:41:36,811 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 22:41:36,811 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 22:41:36,825 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:41:36" (1/1) ... [2020-08-21 22:41:36,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:41:36" (1/1) ... [2020-08-21 22:41:36,899 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:41:36" (1/1) ... [2020-08-21 22:41:36,900 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:41:36" (1/1) ... [2020-08-21 22:41:36,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:41:36" (1/1) ... [2020-08-21 22:41:36,982 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:41:36" (1/1) ... [2020-08-21 22:41:36,994 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:41:36" (1/1) ... [2020-08-21 22:41:37,011 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 22:41:37,012 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 22:41:37,012 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 22:41:37,013 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 22:41:37,014 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:41:36" (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 22:41:37,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 22:41:37,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 22:41:37,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2020-08-21 22:41:37,124 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2020-08-21 22:41:37,125 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2020-08-21 22:41:37,126 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2020-08-21 22:41:37,127 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2020-08-21 22:41:37,127 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2020-08-21 22:41:37,128 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 22:41:37,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2020-08-21 22:41:37,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2020-08-21 22:41:37,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2020-08-21 22:41:37,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ulong [2020-08-21 22:41:37,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2020-08-21 22:41:37,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2020-08-21 22:41:37,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2020-08-21 22:41:37,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_trap [2020-08-21 22:41:37,134 INFO L138 BoogieDeclarations]: Found implementation of procedure to_spi_device [2020-08-21 22:41:37,135 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_set_drvdata [2020-08-21 22:41:37,136 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_get_drvdata [2020-08-21 22:41:37,136 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_unregister_driver [2020-08-21 22:41:37,136 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_message_init [2020-08-21 22:41:37,136 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_message_add_tail [2020-08-21 22:41:37,137 INFO L138 BoogieDeclarations]: Found implementation of procedure wl12xx_spi_reset [2020-08-21 22:41:37,137 INFO L138 BoogieDeclarations]: Found implementation of procedure wl12xx_spi_init [2020-08-21 22:41:37,137 INFO L138 BoogieDeclarations]: Found implementation of procedure wl12xx_spi_read_busy [2020-08-21 22:41:37,138 INFO L138 BoogieDeclarations]: Found implementation of procedure wl12xx_spi_raw_read [2020-08-21 22:41:37,138 INFO L138 BoogieDeclarations]: Found implementation of procedure wl12xx_spi_raw_write [2020-08-21 22:41:37,139 INFO L138 BoogieDeclarations]: Found implementation of procedure wl1271_probe [2020-08-21 22:41:37,139 INFO L138 BoogieDeclarations]: Found implementation of procedure wl1271_remove [2020-08-21 22:41:37,140 INFO L138 BoogieDeclarations]: Found implementation of procedure wl1271_spi_driver_init [2020-08-21 22:41:37,140 INFO L138 BoogieDeclarations]: Found implementation of procedure wl1271_spi_driver_exit [2020-08-21 22:41:37,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize_wl1271_if_operations_2 [2020-08-21 22:41:37,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize_spi_driver_1 [2020-08-21 22:41:37,141 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 22:41:37,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2020-08-21 22:41:37,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_get_intfdata [2020-08-21 22:41:37,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata [2020-08-21 22:41:37,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_put_intf [2020-08-21 22:41:37,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2020-08-21 22:41:37,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_fill_int_urb [2020-08-21 22:41:37,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_fill_bulk_urb [2020-08-21 22:41:37,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2020-08-21 22:41:37,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_get_dev [2020-08-21 22:41:37,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_put_dev [2020-08-21 22:41:37,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_get_interface [2020-08-21 22:41:37,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_put_interface [2020-08-21 22:41:37,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_serial_register [2020-08-21 22:41:37,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_serial_deregister [2020-08-21 22:41:37,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2020-08-21 22:41:37,146 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2020-08-21 22:41:37,146 INFO L138 BoogieDeclarations]: Found implementation of procedure crc7 [2020-08-21 22:41:37,146 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2020-08-21 22:41:37,147 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2020-08-21 22:41:37,147 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_set_drvdata [2020-08-21 22:41:37,147 INFO L138 BoogieDeclarations]: Found implementation of procedure driver_unregister [2020-08-21 22:41:37,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2020-08-21 22:41:37,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_release_2 [2020-08-21 22:41:37,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_setup_2 [2020-08-21 22:41:37,150 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_device_add [2020-08-21 22:41:37,151 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_device_add_data [2020-08-21 22:41:37,151 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_device_add_resources [2020-08-21 22:41:37,151 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_device_alloc [2020-08-21 22:41:37,151 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_device_put [2020-08-21 22:41:37,152 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_device_unregister [2020-08-21 22:41:37,152 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_register_driver [2020-08-21 22:41:37,152 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_setup [2020-08-21 22:41:37,152 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_sync [2020-08-21 22:41:37,153 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2020-08-21 22:41:37,153 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2020-08-21 22:41:37,153 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2020-08-21 22:41:37,154 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-08-21 22:41:37,154 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 22:41:37,155 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2020-08-21 22:41:37,156 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2020-08-21 22:41:37,157 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2020-08-21 22:41:37,158 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2020-08-21 22:41:37,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 22:41:37,159 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2020-08-21 22:41:37,160 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2020-08-21 22:41:37,160 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 22:41:37,160 INFO L130 BoogieDeclarations]: Found specification of procedure driver_unregister [2020-08-21 22:41:37,161 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2020-08-21 22:41:37,161 INFO L130 BoogieDeclarations]: Found specification of procedure dev_set_drvdata [2020-08-21 22:41:37,163 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2020-08-21 22:41:37,163 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2020-08-21 22:41:37,163 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2020-08-21 22:41:37,163 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2020-08-21 22:41:37,164 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2020-08-21 22:41:37,164 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2020-08-21 22:41:37,164 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2020-08-21 22:41:37,165 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 22:41:37,165 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-21 22:41:37,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 22:41:37,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_size_t [2020-08-21 22:41:37,166 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2020-08-21 22:41:37,166 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 22:41:37,166 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 22:41:37,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 22:41:37,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-08-21 22:41:37,167 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2020-08-21 22:41:37,167 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ulong [2020-08-21 22:41:37,168 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2020-08-21 22:41:37,168 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2020-08-21 22:41:37,168 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_trap [2020-08-21 22:41:37,168 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize_wl1271_if_operations_2 [2020-08-21 22:41:37,169 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize_spi_driver_1 [2020-08-21 22:41:37,169 INFO L130 BoogieDeclarations]: Found specification of procedure crc7 [2020-08-21 22:41:37,169 INFO L130 BoogieDeclarations]: Found specification of procedure to_spi_device [2020-08-21 22:41:37,170 INFO L130 BoogieDeclarations]: Found specification of procedure spi_set_drvdata [2020-08-21 22:41:37,170 INFO L130 BoogieDeclarations]: Found specification of procedure spi_get_drvdata [2020-08-21 22:41:37,170 INFO L130 BoogieDeclarations]: Found specification of procedure spi_register_driver [2020-08-21 22:41:37,170 INFO L130 BoogieDeclarations]: Found specification of procedure spi_unregister_driver [2020-08-21 22:41:37,171 INFO L130 BoogieDeclarations]: Found specification of procedure spi_message_init [2020-08-21 22:41:37,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2020-08-21 22:41:37,171 INFO L130 BoogieDeclarations]: Found specification of procedure spi_message_add_tail [2020-08-21 22:41:37,173 INFO L130 BoogieDeclarations]: Found specification of procedure spi_setup [2020-08-21 22:41:37,173 INFO L130 BoogieDeclarations]: Found specification of procedure spi_sync [2020-08-21 22:41:37,173 INFO L130 BoogieDeclarations]: Found specification of procedure platform_device_unregister [2020-08-21 22:41:37,173 INFO L130 BoogieDeclarations]: Found specification of procedure platform_device_alloc [2020-08-21 22:41:37,174 INFO L130 BoogieDeclarations]: Found specification of procedure platform_device_add_resources [2020-08-21 22:41:37,176 INFO L130 BoogieDeclarations]: Found specification of procedure platform_device_add_data [2020-08-21 22:41:37,176 INFO L130 BoogieDeclarations]: Found specification of procedure platform_device_add [2020-08-21 22:41:37,176 INFO L130 BoogieDeclarations]: Found specification of procedure platform_device_put [2020-08-21 22:41:37,176 INFO L130 BoogieDeclarations]: Found specification of procedure wl12xx_spi_reset [2020-08-21 22:41:37,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 22:41:37,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 22:41:37,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 22:41:37,179 INFO L130 BoogieDeclarations]: Found specification of procedure wl12xx_spi_init [2020-08-21 22:41:37,180 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 22:41:37,180 INFO L130 BoogieDeclarations]: Found specification of procedure wl12xx_spi_read_busy [2020-08-21 22:41:37,181 INFO L130 BoogieDeclarations]: Found specification of procedure wl12xx_spi_raw_read [2020-08-21 22:41:37,183 INFO L130 BoogieDeclarations]: Found specification of procedure wl12xx_spi_raw_write [2020-08-21 22:41:37,188 INFO L130 BoogieDeclarations]: Found specification of procedure wl1271_probe [2020-08-21 22:41:37,188 INFO L130 BoogieDeclarations]: Found specification of procedure wl1271_remove [2020-08-21 22:41:37,189 INFO L130 BoogieDeclarations]: Found specification of procedure wl1271_spi_driver_init [2020-08-21 22:41:37,189 INFO L130 BoogieDeclarations]: Found specification of procedure wl1271_spi_driver_exit [2020-08-21 22:41:37,189 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2020-08-21 22:41:37,190 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_release_2 [2020-08-21 22:41:37,191 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2020-08-21 22:41:37,191 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_setup_2 [2020-08-21 22:41:37,192 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 22:41:37,192 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2020-08-21 22:41:37,250 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_get_intfdata [2020-08-21 22:41:37,251 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata [2020-08-21 22:41:37,251 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_put_intf [2020-08-21 22:41:37,251 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2020-08-21 22:41:37,251 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_fill_int_urb [2020-08-21 22:41:37,251 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_fill_bulk_urb [2020-08-21 22:41:37,251 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2020-08-21 22:41:37,251 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2020-08-21 22:41:37,252 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_get_dev [2020-08-21 22:41:37,253 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_put_dev [2020-08-21 22:41:37,253 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_get_interface [2020-08-21 22:41:37,253 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_put_interface [2020-08-21 22:41:37,253 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_serial_register [2020-08-21 22:41:37,253 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_serial_deregister [2020-08-21 22:41:37,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-08-21 22:41:37,254 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 22:41:37,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 22:41:37,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 22:41:37,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-08-21 22:41:37,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 22:41:38,193 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2020-08-21 22:41:38,795 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2020-08-21 22:41:39,392 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 22:41:39,393 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 22:41:39,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:41:39 BoogieIcfgContainer [2020-08-21 22:41:39,401 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 22:41:39,402 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 22:41:39,402 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 22:41:39,406 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 22:41:39,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 10:41:34" (1/3) ... [2020-08-21 22:41:39,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f86b5bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:41:39, skipping insertion in model container [2020-08-21 22:41:39,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:41:36" (2/3) ... [2020-08-21 22:41:39,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f86b5bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:41:39, skipping insertion in model container [2020-08-21 22:41:39,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:41:39" (3/3) ... [2020-08-21 22:41:39,409 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 22:41:39,423 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 22:41:39,436 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 22:41:39,456 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 22:41:39,490 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 22:41:39,490 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 22:41:39,490 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 22:41:39,490 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 22:41:39,490 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 22:41:39,490 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 22:41:39,491 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 22:41:39,491 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 22:41:39,526 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states. [2020-08-21 22:41:39,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 22:41:39,539 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:41:39,540 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 22:41:39,541 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:41:39,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:41:39,549 INFO L82 PathProgramCache]: Analyzing trace with hash -2051707004, now seen corresponding path program 1 times [2020-08-21 22:41:39,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:41:39,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029697013] [2020-08-21 22:41:39,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:41:39,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:41:40,563 WARN L193 SmtUtils]: Spent 503.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 22:41:40,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:41:40,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:41:40,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:41:40,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:41:40,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:41:40,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:41:40,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 22:41:40,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:41:40,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 22:41:40,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:41:40,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 22:41:40,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:41:40,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 22:41:40,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:41:40,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:41:40,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:41:40,798 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 22:41:40,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029697013] [2020-08-21 22:41:40,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:41:40,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 22:41:40,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911104993] [2020-08-21 22:41:40,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 22:41:40,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:41:40,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 22:41:40,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 22:41:40,827 INFO L87 Difference]: Start difference. First operand 469 states. Second operand 7 states. [2020-08-21 22:41:41,175 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-21 22:41:41,895 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-08-21 22:41:42,238 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-08-21 22:41:48,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:41:48,415 INFO L93 Difference]: Finished difference Result 945 states and 1293 transitions. [2020-08-21 22:41:48,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 22:41:48,418 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-08-21 22:41:48,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:41:48,439 INFO L225 Difference]: With dead ends: 945 [2020-08-21 22:41:48,439 INFO L226 Difference]: Without dead ends: 492 [2020-08-21 22:41:48,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-08-21 22:41:48,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2020-08-21 22:41:48,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 437. [2020-08-21 22:41:48,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2020-08-21 22:41:48,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 559 transitions. [2020-08-21 22:41:48,588 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 559 transitions. Word has length 52 [2020-08-21 22:41:48,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:41:48,589 INFO L479 AbstractCegarLoop]: Abstraction has 437 states and 559 transitions. [2020-08-21 22:41:48,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 22:41:48,589 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 559 transitions. [2020-08-21 22:41:48,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-21 22:41:48,593 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:41:48,594 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 22:41:48,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 22:41:48,595 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:41:48,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:41:48,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1503436246, now seen corresponding path program 1 times [2020-08-21 22:41:48,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:41:48,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090599057] [2020-08-21 22:41:48,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:41:48,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:41:49,030 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 22:41:49,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:41:49,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:41:49,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:41:49,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:41:49,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:41:49,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:41:49,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 22:41:49,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:41:49,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 22:41:49,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:41:49,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 22:41:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:41:49,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 22:41:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:41:49,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:41:49,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:41:49,178 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 22:41:49,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090599057] [2020-08-21 22:41:49,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:41:49,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 22:41:49,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155491906] [2020-08-21 22:41:49,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 22:41:49,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:41:49,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 22:41:49,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 22:41:49,182 INFO L87 Difference]: Start difference. First operand 437 states and 559 transitions. Second operand 6 states. [2020-08-21 22:41:49,496 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-21 22:41:50,248 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-08-21 22:41:51,553 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 22:41:58,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:41:58,931 INFO L93 Difference]: Finished difference Result 1313 states and 1710 transitions. [2020-08-21 22:41:58,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 22:41:58,934 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-08-21 22:41:58,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:41:58,943 INFO L225 Difference]: With dead ends: 1313 [2020-08-21 22:41:58,943 INFO L226 Difference]: Without dead ends: 893 [2020-08-21 22:41:58,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-08-21 22:41:58,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2020-08-21 22:41:59,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 796. [2020-08-21 22:41:59,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 796 states. [2020-08-21 22:41:59,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1025 transitions. [2020-08-21 22:41:59,080 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1025 transitions. Word has length 54 [2020-08-21 22:41:59,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:41:59,080 INFO L479 AbstractCegarLoop]: Abstraction has 796 states and 1025 transitions. [2020-08-21 22:41:59,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 22:41:59,081 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1025 transitions. [2020-08-21 22:41:59,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-21 22:41:59,083 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:41:59,084 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 22:41:59,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 22:41:59,084 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:41:59,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:41:59,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1632677837, now seen corresponding path program 1 times [2020-08-21 22:41:59,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:41:59,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425452951] [2020-08-21 22:41:59,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:41:59,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:41:59,678 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 22:41:59,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:41:59,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:41:59,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:41:59,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:41:59,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:41:59,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:41:59,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 22:41:59,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:41:59,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 22:41:59,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:41:59,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 22:41:59,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:41:59,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 22:41:59,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:41:59,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 22:41:59,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:41:59,915 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 22:41:59,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425452951] [2020-08-21 22:41:59,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:41:59,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 22:41:59,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384168939] [2020-08-21 22:41:59,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 22:41:59,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:41:59,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 22:41:59,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 22:41:59,918 INFO L87 Difference]: Start difference. First operand 796 states and 1025 transitions. Second operand 6 states. [2020-08-21 22:42:00,247 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-21 22:42:00,618 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-08-21 22:42:00,945 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 22:42:06,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:42:06,577 INFO L93 Difference]: Finished difference Result 895 states and 1170 transitions. [2020-08-21 22:42:06,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 22:42:06,578 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-08-21 22:42:06,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:42:06,586 INFO L225 Difference]: With dead ends: 895 [2020-08-21 22:42:06,587 INFO L226 Difference]: Without dead ends: 892 [2020-08-21 22:42:06,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-08-21 22:42:06,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2020-08-21 22:42:06,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 795. [2020-08-21 22:42:06,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 795 states. [2020-08-21 22:42:06,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1023 transitions. [2020-08-21 22:42:06,681 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1023 transitions. Word has length 58 [2020-08-21 22:42:06,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:42:06,682 INFO L479 AbstractCegarLoop]: Abstraction has 795 states and 1023 transitions. [2020-08-21 22:42:06,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 22:42:06,682 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1023 transitions. [2020-08-21 22:42:06,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-21 22:42:06,685 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:42:06,685 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 22:42:06,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 22:42:06,686 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:42:06,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:42:06,686 INFO L82 PathProgramCache]: Analyzing trace with hash 926229248, now seen corresponding path program 1 times [2020-08-21 22:42:06,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:42:06,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470327852] [2020-08-21 22:42:06,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:42:06,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:42:07,144 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 22:42:07,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:42:07,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:42:07,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:42:07,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:42:07,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:42:07,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:42:07,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 22:42:07,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:42:07,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 22:42:07,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:42:07,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 22:42:07,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:42:07,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 22:42:07,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:42:07,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 22:42:07,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:42:07,369 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 22:42:07,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470327852] [2020-08-21 22:42:07,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:42:07,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 22:42:07,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412445143] [2020-08-21 22:42:07,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 22:42:07,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:42:07,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 22:42:07,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 22:42:07,373 INFO L87 Difference]: Start difference. First operand 795 states and 1023 transitions. Second operand 6 states. [2020-08-21 22:42:07,644 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-21 22:42:08,020 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-08-21 22:42:08,357 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-21 22:42:15,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:42:15,034 INFO L93 Difference]: Finished difference Result 894 states and 1168 transitions. [2020-08-21 22:42:15,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 22:42:15,036 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-08-21 22:42:15,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:42:15,042 INFO L225 Difference]: With dead ends: 894 [2020-08-21 22:42:15,043 INFO L226 Difference]: Without dead ends: 891 [2020-08-21 22:42:15,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-08-21 22:42:15,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2020-08-21 22:42:15,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 794. [2020-08-21 22:42:15,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 794 states. [2020-08-21 22:42:15,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1021 transitions. [2020-08-21 22:42:15,137 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1021 transitions. Word has length 59 [2020-08-21 22:42:15,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:42:15,138 INFO L479 AbstractCegarLoop]: Abstraction has 794 states and 1021 transitions. [2020-08-21 22:42:15,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 22:42:15,139 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1021 transitions. [2020-08-21 22:42:15,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-21 22:42:15,141 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:42:15,141 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 22:42:15,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 22:42:15,142 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:42:15,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:42:15,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1352024874, now seen corresponding path program 1 times [2020-08-21 22:42:15,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:42:15,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835538389] [2020-08-21 22:42:15,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:42:15,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:42:15,672 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 22:42:15,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:42:15,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:42:15,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:42:15,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:42:15,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:42:15,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:42:15,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 22:42:15,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:42:15,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 22:42:15,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:42:15,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 22:42:15,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:42:15,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 22:42:15,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:42:15,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 22:42:15,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:42:15,848 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 22:42:15,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835538389] [2020-08-21 22:42:15,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:42:15,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 22:42:15,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117489434] [2020-08-21 22:42:15,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 22:42:15,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:42:15,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 22:42:15,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 22:42:15,852 INFO L87 Difference]: Start difference. First operand 794 states and 1021 transitions. Second operand 6 states. [2020-08-21 22:42:16,207 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-21 22:42:16,583 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-08-21 22:42:16,942 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 22:42:22,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:42:22,552 INFO L93 Difference]: Finished difference Result 893 states and 1166 transitions. [2020-08-21 22:42:22,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 22:42:22,553 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-08-21 22:42:22,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:42:22,562 INFO L225 Difference]: With dead ends: 893 [2020-08-21 22:42:22,562 INFO L226 Difference]: Without dead ends: 890 [2020-08-21 22:42:22,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-08-21 22:42:22,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2020-08-21 22:42:22,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 793. [2020-08-21 22:42:22,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 793 states. [2020-08-21 22:42:22,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1019 transitions. [2020-08-21 22:42:22,654 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1019 transitions. Word has length 60 [2020-08-21 22:42:22,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:42:22,656 INFO L479 AbstractCegarLoop]: Abstraction has 793 states and 1019 transitions. [2020-08-21 22:42:22,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 22:42:22,657 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1019 transitions. [2020-08-21 22:42:22,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 22:42:22,661 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:42:22,661 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 22:42:22,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 22:42:22,662 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:42:22,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:42:22,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1036546243, now seen corresponding path program 1 times [2020-08-21 22:42:22,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:42:22,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827317726] [2020-08-21 22:42:22,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:42:22,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:42:23,097 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 22:42:23,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:42:23,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:42:23,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:42:23,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:42:23,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:42:23,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:42:23,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 22:42:23,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:42:23,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 22:42:23,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:42:23,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 22:42:23,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:42:23,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 22:42:23,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:42:23,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 22:42:23,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:42:23,302 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 22:42:23,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827317726] [2020-08-21 22:42:23,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:42:23,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 22:42:23,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359947535] [2020-08-21 22:42:23,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 22:42:23,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:42:23,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 22:42:23,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 22:42:23,305 INFO L87 Difference]: Start difference. First operand 793 states and 1019 transitions. Second operand 6 states. [2020-08-21 22:42:23,591 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-21 22:42:23,972 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-08-21 22:42:24,326 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-21 22:42:30,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:42:30,900 INFO L93 Difference]: Finished difference Result 892 states and 1164 transitions. [2020-08-21 22:42:30,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 22:42:30,901 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-08-21 22:42:30,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:42:30,909 INFO L225 Difference]: With dead ends: 892 [2020-08-21 22:42:30,909 INFO L226 Difference]: Without dead ends: 889 [2020-08-21 22:42:30,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-08-21 22:42:30,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2020-08-21 22:42:31,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 792. [2020-08-21 22:42:31,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 792 states. [2020-08-21 22:42:31,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1017 transitions. [2020-08-21 22:42:31,008 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1017 transitions. Word has length 61 [2020-08-21 22:42:31,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:42:31,008 INFO L479 AbstractCegarLoop]: Abstraction has 792 states and 1017 transitions. [2020-08-21 22:42:31,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 22:42:31,008 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1017 transitions. [2020-08-21 22:42:31,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-21 22:42:31,010 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:42:31,010 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 22:42:31,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 22:42:31,011 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:42:31,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:42:31,011 INFO L82 PathProgramCache]: Analyzing trace with hash 2067811705, now seen corresponding path program 1 times [2020-08-21 22:42:31,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:42:31,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272864857] [2020-08-21 22:42:31,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:42:31,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:42:31,431 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-21 22:42:31,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:42:31,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:42:31,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:42:31,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:42:31,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 22:42:31,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:42:31,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 22:42:31,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:42:31,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 22:42:31,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:42:31,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 22:42:31,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:42:31,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 22:42:31,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:42:31,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 22:42:31,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:42:31,585 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 22:42:31,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272864857] [2020-08-21 22:42:31,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:42:31,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 22:42:31,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191776184] [2020-08-21 22:42:31,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 22:42:31,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:42:31,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 22:42:31,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 22:42:31,588 INFO L87 Difference]: Start difference. First operand 792 states and 1017 transitions. Second operand 6 states. [2020-08-21 22:42:31,882 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-21 22:42:32,267 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-08-21 22:42:32,637 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 189