/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=5 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST -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 0.1.25-5644d1e-m [2020-08-18 22:25:43,771 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 22:25:43,774 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 22:25:43,817 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 22:25:43,817 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 22:25:43,826 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 22:25:43,828 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 22:25:43,832 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 22:25:43,834 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 22:25:43,837 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 22:25:43,838 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 22:25:43,839 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 22:25:43,839 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 22:25:43,841 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 22:25:43,844 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 22:25:43,845 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 22:25:43,846 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 22:25:43,847 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 22:25:43,849 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 22:25:43,856 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 22:25:43,858 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 22:25:43,859 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 22:25:43,860 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 22:25:43,862 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 22:25:43,873 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 22:25:43,873 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 22:25:43,873 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 22:25:43,875 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 22:25:43,875 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 22:25:43,877 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 22:25:43,878 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 22:25:43,878 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 22:25:43,879 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 22:25:43,880 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 22:25:43,881 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 22:25:43,881 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 22:25:43,882 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 22:25:43,882 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 22:25:43,882 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 22:25:43,883 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 22:25:43,884 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 22:25:43,885 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 [2020-08-18 22:25:43,927 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 22:25:43,927 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 22:25:43,929 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 22:25:43,929 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 22:25:43,929 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 22:25:43,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 22:25:43,930 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 22:25:43,930 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 22:25:43,930 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 22:25:43,930 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 22:25:43,931 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 22:25:43,932 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 22:25:43,932 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 22:25:43,932 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 22:25:43,933 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 22:25:43,933 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 22:25:43,933 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 22:25:43,933 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 22:25:43,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 22:25:43,934 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 22:25:43,934 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 22:25:43,934 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 22:25:43,934 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 22:25:43,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 22:25:43,935 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 22:25:43,935 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 22:25:43,935 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-18 22:25:43,935 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=5;interpolation-heuristic=NARROWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; [2020-08-18 22:25:44,235 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 22:25:44,248 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 22:25:44,251 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 22:25:44,253 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 22:25:44,253 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 22:25:44,254 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--ti--wlcore--wlcore_spi.ko-entry_point.cil.out.i [2020-08-18 22:25:44,325 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/639312bfd/666028c582b14d64876f88ff4406cb9a/FLAG34ce8b228 [2020-08-18 22:25:45,115 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 22:25:45,116 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--ti--wlcore--wlcore_spi.ko-entry_point.cil.out.i [2020-08-18 22:25:45,162 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/639312bfd/666028c582b14d64876f88ff4406cb9a/FLAG34ce8b228 [2020-08-18 22:25:45,653 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/639312bfd/666028c582b14d64876f88ff4406cb9a [2020-08-18 22:25:45,662 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 22:25:45,664 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 22:25:45,665 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 22:25:45,665 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 22:25:45,668 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 22:25:45,669 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:25:45" (1/1) ... [2020-08-18 22:25:45,672 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35246ee9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:25:45, skipping insertion in model container [2020-08-18 22:25:45,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:25:45" (1/1) ... [2020-08-18 22:25:45,680 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 22:25:45,818 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 22:25:47,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:25:47,377 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 22:25:47,711 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:25:47,784 INFO L208 MainTranslator]: Completed translation [2020-08-18 22:25:47,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:25:47 WrapperNode [2020-08-18 22:25:47,785 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 22:25:47,787 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 22:25:47,787 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 22:25:47,787 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 22:25:47,801 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:25:47" (1/1) ... [2020-08-18 22:25:47,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:25:47" (1/1) ... [2020-08-18 22:25:47,878 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:25:47" (1/1) ... [2020-08-18 22:25:47,883 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:25:47" (1/1) ... [2020-08-18 22:25:47,964 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:25:47" (1/1) ... [2020-08-18 22:25:47,974 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:25:47" (1/1) ... [2020-08-18 22:25:47,985 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:25:47" (1/1) ... [2020-08-18 22:25:48,001 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 22:25:48,001 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 22:25:48,002 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 22:25:48,002 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 22:25:48,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:25:47" (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 [2020-08-18 22:25:48,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 22:25:48,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 22:25:48,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2020-08-18 22:25:48,138 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2020-08-18 22:25:48,138 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2020-08-18 22:25:48,138 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2020-08-18 22:25:48,140 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2020-08-18 22:25:48,140 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2020-08-18 22:25:48,140 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 22:25:48,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2020-08-18 22:25:48,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2020-08-18 22:25:48,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2020-08-18 22:25:48,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ulong [2020-08-18 22:25:48,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2020-08-18 22:25:48,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2020-08-18 22:25:48,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2020-08-18 22:25:48,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_trap [2020-08-18 22:25:48,145 INFO L138 BoogieDeclarations]: Found implementation of procedure to_spi_device [2020-08-18 22:25:48,146 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_set_drvdata [2020-08-18 22:25:48,146 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_get_drvdata [2020-08-18 22:25:48,147 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_unregister_driver [2020-08-18 22:25:48,147 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_message_init [2020-08-18 22:25:48,147 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_message_add_tail [2020-08-18 22:25:48,147 INFO L138 BoogieDeclarations]: Found implementation of procedure wl12xx_spi_reset [2020-08-18 22:25:48,148 INFO L138 BoogieDeclarations]: Found implementation of procedure wl12xx_spi_init [2020-08-18 22:25:48,148 INFO L138 BoogieDeclarations]: Found implementation of procedure wl12xx_spi_read_busy [2020-08-18 22:25:48,148 INFO L138 BoogieDeclarations]: Found implementation of procedure wl12xx_spi_raw_read [2020-08-18 22:25:48,148 INFO L138 BoogieDeclarations]: Found implementation of procedure wl12xx_spi_raw_write [2020-08-18 22:25:48,149 INFO L138 BoogieDeclarations]: Found implementation of procedure wl1271_probe [2020-08-18 22:25:48,149 INFO L138 BoogieDeclarations]: Found implementation of procedure wl1271_remove [2020-08-18 22:25:48,150 INFO L138 BoogieDeclarations]: Found implementation of procedure wl1271_spi_driver_init [2020-08-18 22:25:48,150 INFO L138 BoogieDeclarations]: Found implementation of procedure wl1271_spi_driver_exit [2020-08-18 22:25:48,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize_wl1271_if_operations_2 [2020-08-18 22:25:48,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize_spi_driver_1 [2020-08-18 22:25:48,152 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 22:25:48,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2020-08-18 22:25:48,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_get_intfdata [2020-08-18 22:25:48,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata [2020-08-18 22:25:48,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_put_intf [2020-08-18 22:25:48,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2020-08-18 22:25:48,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_fill_int_urb [2020-08-18 22:25:48,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_fill_bulk_urb [2020-08-18 22:25:48,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2020-08-18 22:25:48,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_get_dev [2020-08-18 22:25:48,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_put_dev [2020-08-18 22:25:48,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_get_interface [2020-08-18 22:25:48,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_put_interface [2020-08-18 22:25:48,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_serial_register [2020-08-18 22:25:48,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_serial_deregister [2020-08-18 22:25:48,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2020-08-18 22:25:48,157 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2020-08-18 22:25:48,157 INFO L138 BoogieDeclarations]: Found implementation of procedure crc7 [2020-08-18 22:25:48,157 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2020-08-18 22:25:48,158 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2020-08-18 22:25:48,158 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_set_drvdata [2020-08-18 22:25:48,158 INFO L138 BoogieDeclarations]: Found implementation of procedure driver_unregister [2020-08-18 22:25:48,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2020-08-18 22:25:48,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_release_2 [2020-08-18 22:25:48,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_setup_2 [2020-08-18 22:25:48,160 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_device_add [2020-08-18 22:25:48,160 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_device_add_data [2020-08-18 22:25:48,161 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_device_add_resources [2020-08-18 22:25:48,161 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_device_alloc [2020-08-18 22:25:48,161 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_device_put [2020-08-18 22:25:48,162 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_device_unregister [2020-08-18 22:25:48,162 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_register_driver [2020-08-18 22:25:48,162 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_setup [2020-08-18 22:25:48,162 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_sync [2020-08-18 22:25:48,163 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2020-08-18 22:25:48,163 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2020-08-18 22:25:48,163 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2020-08-18 22:25:48,164 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-08-18 22:25:48,164 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 22:25:48,164 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2020-08-18 22:25:48,165 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2020-08-18 22:25:48,166 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2020-08-18 22:25:48,167 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2020-08-18 22:25:48,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 22:25:48,167 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2020-08-18 22:25:48,168 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2020-08-18 22:25:48,169 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 22:25:48,169 INFO L130 BoogieDeclarations]: Found specification of procedure driver_unregister [2020-08-18 22:25:48,169 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2020-08-18 22:25:48,169 INFO L130 BoogieDeclarations]: Found specification of procedure dev_set_drvdata [2020-08-18 22:25:48,170 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2020-08-18 22:25:48,171 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2020-08-18 22:25:48,171 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2020-08-18 22:25:48,171 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2020-08-18 22:25:48,171 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2020-08-18 22:25:48,172 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2020-08-18 22:25:48,172 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2020-08-18 22:25:48,172 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 22:25:48,172 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-18 22:25:48,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 22:25:48,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_size_t [2020-08-18 22:25:48,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2020-08-18 22:25:48,173 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 22:25:48,174 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 22:25:48,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 22:25:48,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-08-18 22:25:48,175 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2020-08-18 22:25:48,175 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ulong [2020-08-18 22:25:48,175 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2020-08-18 22:25:48,175 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2020-08-18 22:25:48,176 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_trap [2020-08-18 22:25:48,176 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize_wl1271_if_operations_2 [2020-08-18 22:25:48,176 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize_spi_driver_1 [2020-08-18 22:25:48,176 INFO L130 BoogieDeclarations]: Found specification of procedure crc7 [2020-08-18 22:25:48,177 INFO L130 BoogieDeclarations]: Found specification of procedure to_spi_device [2020-08-18 22:25:48,177 INFO L130 BoogieDeclarations]: Found specification of procedure spi_set_drvdata [2020-08-18 22:25:48,177 INFO L130 BoogieDeclarations]: Found specification of procedure spi_get_drvdata [2020-08-18 22:25:48,178 INFO L130 BoogieDeclarations]: Found specification of procedure spi_register_driver [2020-08-18 22:25:48,178 INFO L130 BoogieDeclarations]: Found specification of procedure spi_unregister_driver [2020-08-18 22:25:48,242 INFO L130 BoogieDeclarations]: Found specification of procedure spi_message_init [2020-08-18 22:25:48,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2020-08-18 22:25:48,242 INFO L130 BoogieDeclarations]: Found specification of procedure spi_message_add_tail [2020-08-18 22:25:48,243 INFO L130 BoogieDeclarations]: Found specification of procedure spi_setup [2020-08-18 22:25:48,243 INFO L130 BoogieDeclarations]: Found specification of procedure spi_sync [2020-08-18 22:25:48,243 INFO L130 BoogieDeclarations]: Found specification of procedure platform_device_unregister [2020-08-18 22:25:48,243 INFO L130 BoogieDeclarations]: Found specification of procedure platform_device_alloc [2020-08-18 22:25:48,243 INFO L130 BoogieDeclarations]: Found specification of procedure platform_device_add_resources [2020-08-18 22:25:48,243 INFO L130 BoogieDeclarations]: Found specification of procedure platform_device_add_data [2020-08-18 22:25:48,243 INFO L130 BoogieDeclarations]: Found specification of procedure platform_device_add [2020-08-18 22:25:48,244 INFO L130 BoogieDeclarations]: Found specification of procedure platform_device_put [2020-08-18 22:25:48,245 INFO L130 BoogieDeclarations]: Found specification of procedure wl12xx_spi_reset [2020-08-18 22:25:48,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 22:25:48,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 22:25:48,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 22:25:48,245 INFO L130 BoogieDeclarations]: Found specification of procedure wl12xx_spi_init [2020-08-18 22:25:48,245 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 22:25:48,245 INFO L130 BoogieDeclarations]: Found specification of procedure wl12xx_spi_read_busy [2020-08-18 22:25:48,246 INFO L130 BoogieDeclarations]: Found specification of procedure wl12xx_spi_raw_read [2020-08-18 22:25:48,246 INFO L130 BoogieDeclarations]: Found specification of procedure wl12xx_spi_raw_write [2020-08-18 22:25:48,246 INFO L130 BoogieDeclarations]: Found specification of procedure wl1271_probe [2020-08-18 22:25:48,246 INFO L130 BoogieDeclarations]: Found specification of procedure wl1271_remove [2020-08-18 22:25:48,246 INFO L130 BoogieDeclarations]: Found specification of procedure wl1271_spi_driver_init [2020-08-18 22:25:48,246 INFO L130 BoogieDeclarations]: Found specification of procedure wl1271_spi_driver_exit [2020-08-18 22:25:48,247 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2020-08-18 22:25:48,248 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_release_2 [2020-08-18 22:25:48,248 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2020-08-18 22:25:48,249 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_setup_2 [2020-08-18 22:25:48,249 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 22:25:48,249 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2020-08-18 22:25:48,249 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_get_intfdata [2020-08-18 22:25:48,250 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata [2020-08-18 22:25:48,250 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_put_intf [2020-08-18 22:25:48,250 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2020-08-18 22:25:48,250 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_fill_int_urb [2020-08-18 22:25:48,250 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_fill_bulk_urb [2020-08-18 22:25:48,252 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2020-08-18 22:25:48,252 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2020-08-18 22:25:48,252 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_get_dev [2020-08-18 22:25:48,253 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_put_dev [2020-08-18 22:25:48,253 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_get_interface [2020-08-18 22:25:48,253 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_put_interface [2020-08-18 22:25:48,253 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_serial_register [2020-08-18 22:25:48,253 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_serial_deregister [2020-08-18 22:25:48,254 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-08-18 22:25:48,254 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 22:25:48,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 22:25:48,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 22:25:48,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-08-18 22:25:48,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 22:25:49,171 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2020-08-18 22:25:49,726 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2020-08-18 22:25:50,218 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 22:25:50,218 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 22:25:50,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:25:50 BoogieIcfgContainer [2020-08-18 22:25:50,226 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 22:25:50,227 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 22:25:50,227 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 22:25:50,230 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 22:25:50,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:25:45" (1/3) ... [2020-08-18 22:25:50,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@632f8958 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:25:50, skipping insertion in model container [2020-08-18 22:25:50,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:25:47" (2/3) ... [2020-08-18 22:25:50,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@632f8958 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:25:50, skipping insertion in model container [2020-08-18 22:25:50,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:25:50" (3/3) ... [2020-08-18 22:25:50,234 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 [2020-08-18 22:25:50,244 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 22:25:50,253 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 22:25:50,267 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 22:25:50,296 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 22:25:50,296 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 22:25:50,296 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 22:25:50,296 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 22:25:50,296 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 22:25:50,296 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 22:25:50,297 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 22:25:50,297 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 22:25:50,327 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states. [2020-08-18 22:25:50,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-18 22:25:50,337 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:25:50,339 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] [2020-08-18 22:25:50,339 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:25:50,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:25:50,345 INFO L82 PathProgramCache]: Analyzing trace with hash -2051707004, now seen corresponding path program 1 times [2020-08-18 22:25:50,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:25:50,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972823843] [2020-08-18 22:25:50,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:25:50,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:25:51,266 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 22:25:51,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:25:51,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:25:51,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:25:51,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:25:51,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:25:51,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:25:51,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 22:25:51,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:25:51,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 22:25:51,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:25:51,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 22:25:51,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:25:51,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 22:25:51,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:25:51,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:25:51,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:25:51,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 22:25:51,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972823843] [2020-08-18 22:25:51,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:25:51,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 22:25:51,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132950200] [2020-08-18 22:25:51,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 22:25:51,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:25:51,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 22:25:51,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 22:25:51,480 INFO L87 Difference]: Start difference. First operand 469 states. Second operand 7 states. [2020-08-18 22:25:51,797 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-18 22:25:52,680 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-08-18 22:25:53,021 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-08-18 22:25:59,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:25:59,223 INFO L93 Difference]: Finished difference Result 945 states and 1293 transitions. [2020-08-18 22:25:59,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 22:25:59,226 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-08-18 22:25:59,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:25:59,246 INFO L225 Difference]: With dead ends: 945 [2020-08-18 22:25:59,246 INFO L226 Difference]: Without dead ends: 492 [2020-08-18 22:25:59,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-08-18 22:25:59,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2020-08-18 22:25:59,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 437. [2020-08-18 22:25:59,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2020-08-18 22:25:59,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 559 transitions. [2020-08-18 22:25:59,405 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 559 transitions. Word has length 52 [2020-08-18 22:25:59,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:25:59,406 INFO L479 AbstractCegarLoop]: Abstraction has 437 states and 559 transitions. [2020-08-18 22:25:59,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 22:25:59,406 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 559 transitions. [2020-08-18 22:25:59,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-18 22:25:59,411 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:25:59,411 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] [2020-08-18 22:25:59,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 22:25:59,412 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:25:59,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:25:59,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1503436246, now seen corresponding path program 1 times [2020-08-18 22:25:59,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:25:59,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2147031274] [2020-08-18 22:25:59,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:25:59,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:25:59,865 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 22:25:59,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:25:59,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:25:59,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:25:59,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:25:59,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:25:59,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:25:59,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 22:25:59,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:25:59,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 22:25:59,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:25:59,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 22:25:59,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:25:59,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 22:25:59,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:25:59,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:25:59,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:00,014 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-18 22:26:00,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2147031274] [2020-08-18 22:26:00,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:26:00,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 22:26:00,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365119888] [2020-08-18 22:26:00,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 22:26:00,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:26:00,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 22:26:00,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:26:00,019 INFO L87 Difference]: Start difference. First operand 437 states and 559 transitions. Second operand 6 states. [2020-08-18 22:26:00,388 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-18 22:26:01,174 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-08-18 22:26:02,562 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 22:26:09,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:26:09,806 INFO L93 Difference]: Finished difference Result 1313 states and 1710 transitions. [2020-08-18 22:26:09,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 22:26:09,808 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-08-18 22:26:09,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:26:09,817 INFO L225 Difference]: With dead ends: 1313 [2020-08-18 22:26:09,817 INFO L226 Difference]: Without dead ends: 893 [2020-08-18 22:26:09,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-08-18 22:26:09,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2020-08-18 22:26:09,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 796. [2020-08-18 22:26:09,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 796 states. [2020-08-18 22:26:09,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1025 transitions. [2020-08-18 22:26:09,936 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1025 transitions. Word has length 54 [2020-08-18 22:26:09,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:26:09,937 INFO L479 AbstractCegarLoop]: Abstraction has 796 states and 1025 transitions. [2020-08-18 22:26:09,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 22:26:09,937 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1025 transitions. [2020-08-18 22:26:09,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-18 22:26:09,940 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:26:09,940 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] [2020-08-18 22:26:09,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 22:26:09,941 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:26:09,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:26:09,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1632677837, now seen corresponding path program 1 times [2020-08-18 22:26:09,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:26:09,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736087246] [2020-08-18 22:26:09,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:26:09,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:10,332 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 22:26:10,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:26:10,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:10,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:26:10,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:10,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:26:10,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:10,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 22:26:10,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:10,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 22:26:10,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:10,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 22:26:10,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:10,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 22:26:10,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:10,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 22:26:10,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:10,501 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-18 22:26:10,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736087246] [2020-08-18 22:26:10,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:26:10,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 22:26:10,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125496861] [2020-08-18 22:26:10,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 22:26:10,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:26:10,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 22:26:10,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:26:10,504 INFO L87 Difference]: Start difference. First operand 796 states and 1025 transitions. Second operand 6 states. [2020-08-18 22:26:10,896 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-18 22:26:11,437 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-08-18 22:26:11,797 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 22:26:16,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:26:16,921 INFO L93 Difference]: Finished difference Result 895 states and 1170 transitions. [2020-08-18 22:26:16,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 22:26:16,922 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-08-18 22:26:16,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:26:16,929 INFO L225 Difference]: With dead ends: 895 [2020-08-18 22:26:16,930 INFO L226 Difference]: Without dead ends: 892 [2020-08-18 22:26:16,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-08-18 22:26:16,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2020-08-18 22:26:17,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 795. [2020-08-18 22:26:17,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 795 states. [2020-08-18 22:26:17,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1023 transitions. [2020-08-18 22:26:17,043 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1023 transitions. Word has length 58 [2020-08-18 22:26:17,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:26:17,044 INFO L479 AbstractCegarLoop]: Abstraction has 795 states and 1023 transitions. [2020-08-18 22:26:17,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 22:26:17,044 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1023 transitions. [2020-08-18 22:26:17,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-18 22:26:17,047 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:26:17,047 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] [2020-08-18 22:26:17,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 22:26:17,048 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:26:17,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:26:17,048 INFO L82 PathProgramCache]: Analyzing trace with hash 926229248, now seen corresponding path program 1 times [2020-08-18 22:26:17,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:26:17,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276864154] [2020-08-18 22:26:17,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:26:17,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:17,436 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 22:26:17,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:26:17,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:17,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:26:17,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:17,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:26:17,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:17,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 22:26:17,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:17,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 22:26:17,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:17,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 22:26:17,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:17,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 22:26:17,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:17,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 22:26:17,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:17,636 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-18 22:26:17,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276864154] [2020-08-18 22:26:17,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:26:17,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 22:26:17,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012617586] [2020-08-18 22:26:17,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 22:26:17,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:26:17,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 22:26:17,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:26:17,639 INFO L87 Difference]: Start difference. First operand 795 states and 1023 transitions. Second operand 6 states. [2020-08-18 22:26:17,994 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-18 22:26:18,403 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-08-18 22:26:18,740 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 22:26:25,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:26:25,478 INFO L93 Difference]: Finished difference Result 894 states and 1168 transitions. [2020-08-18 22:26:25,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 22:26:25,479 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-08-18 22:26:25,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:26:25,486 INFO L225 Difference]: With dead ends: 894 [2020-08-18 22:26:25,487 INFO L226 Difference]: Without dead ends: 891 [2020-08-18 22:26:25,488 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 [2020-08-18 22:26:25,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2020-08-18 22:26:25,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 794. [2020-08-18 22:26:25,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 794 states. [2020-08-18 22:26:25,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1021 transitions. [2020-08-18 22:26:25,589 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1021 transitions. Word has length 59 [2020-08-18 22:26:25,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:26:25,590 INFO L479 AbstractCegarLoop]: Abstraction has 794 states and 1021 transitions. [2020-08-18 22:26:25,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 22:26:25,591 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1021 transitions. [2020-08-18 22:26:25,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-18 22:26:25,593 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:26:25,593 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] [2020-08-18 22:26:25,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 22:26:25,594 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:26:25,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:26:25,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1352024874, now seen corresponding path program 1 times [2020-08-18 22:26:25,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:26:25,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656887752] [2020-08-18 22:26:25,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:26:25,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:26,003 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 22:26:26,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:26:26,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:26,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:26:26,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:26,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:26:26,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:26,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 22:26:26,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:26,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 22:26:26,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:26,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 22:26:26,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:26,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 22:26:26,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:26,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 22:26:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:26,146 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-18 22:26:26,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656887752] [2020-08-18 22:26:26,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:26:26,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 22:26:26,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966235215] [2020-08-18 22:26:26,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 22:26:26,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:26:26,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 22:26:26,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:26:26,151 INFO L87 Difference]: Start difference. First operand 794 states and 1021 transitions. Second operand 6 states. [2020-08-18 22:26:26,533 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-18 22:26:26,973 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-08-18 22:26:27,361 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 22:26:32,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:26:32,710 INFO L93 Difference]: Finished difference Result 893 states and 1166 transitions. [2020-08-18 22:26:32,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 22:26:32,711 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-08-18 22:26:32,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:26:32,718 INFO L225 Difference]: With dead ends: 893 [2020-08-18 22:26:32,719 INFO L226 Difference]: Without dead ends: 890 [2020-08-18 22:26:32,720 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 [2020-08-18 22:26:32,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2020-08-18 22:26:32,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 793. [2020-08-18 22:26:32,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 793 states. [2020-08-18 22:26:32,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1019 transitions. [2020-08-18 22:26:32,813 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1019 transitions. Word has length 60 [2020-08-18 22:26:32,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:26:32,815 INFO L479 AbstractCegarLoop]: Abstraction has 793 states and 1019 transitions. [2020-08-18 22:26:32,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 22:26:32,815 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1019 transitions. [2020-08-18 22:26:32,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 22:26:32,817 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:26:32,818 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] [2020-08-18 22:26:32,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 22:26:32,820 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:26:32,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:26:32,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1036546243, now seen corresponding path program 1 times [2020-08-18 22:26:32,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:26:32,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916092944] [2020-08-18 22:26:32,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:26:32,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:33,172 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 22:26:33,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:26:33,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:33,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:26:33,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:33,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:26:33,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:33,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 22:26:33,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:33,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 22:26:33,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:33,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 22:26:33,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:33,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 22:26:33,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:33,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 22:26:33,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:33,339 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-18 22:26:33,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916092944] [2020-08-18 22:26:33,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:26:33,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 22:26:33,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421019230] [2020-08-18 22:26:33,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 22:26:33,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:26:33,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 22:26:33,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:26:33,342 INFO L87 Difference]: Start difference. First operand 793 states and 1019 transitions. Second operand 6 states. [2020-08-18 22:26:33,614 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-18 22:26:33,970 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-08-18 22:26:34,289 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 22:26:41,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:26:41,533 INFO L93 Difference]: Finished difference Result 892 states and 1164 transitions. [2020-08-18 22:26:41,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 22:26:41,534 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-08-18 22:26:41,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:26:41,540 INFO L225 Difference]: With dead ends: 892 [2020-08-18 22:26:41,541 INFO L226 Difference]: Without dead ends: 889 [2020-08-18 22:26:41,542 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 [2020-08-18 22:26:41,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2020-08-18 22:26:41,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 792. [2020-08-18 22:26:41,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 792 states. [2020-08-18 22:26:41,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1017 transitions. [2020-08-18 22:26:41,626 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1017 transitions. Word has length 61 [2020-08-18 22:26:41,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:26:41,627 INFO L479 AbstractCegarLoop]: Abstraction has 792 states and 1017 transitions. [2020-08-18 22:26:41,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 22:26:41,627 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1017 transitions. [2020-08-18 22:26:41,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-18 22:26:41,629 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:26:41,629 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] [2020-08-18 22:26:41,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 22:26:41,629 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:26:41,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:26:41,630 INFO L82 PathProgramCache]: Analyzing trace with hash 2067811705, now seen corresponding path program 1 times [2020-08-18 22:26:41,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:26:41,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134516049] [2020-08-18 22:26:41,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:26:41,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:41,959 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 22:26:41,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:26:41,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:42,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 22:26:42,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:42,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 22:26:42,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:42,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 22:26:42,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:42,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 22:26:42,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:42,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 22:26:42,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:42,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 22:26:42,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:42,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 22:26:42,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:26:42,079 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-18 22:26:42,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134516049] [2020-08-18 22:26:42,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:26:42,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 22:26:42,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859075680] [2020-08-18 22:26:42,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 22:26:42,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:26:42,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 22:26:42,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:26:42,081 INFO L87 Difference]: Start difference. First operand 792 states and 1017 transitions. Second operand 6 states. [2020-08-18 22:26:42,375 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-18 22:26:42,724 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-08-18 22:26:43,051 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 189