/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=HIGHLEXORDER -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 20:00:36,286 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 20:00:36,289 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 20:00:36,318 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 20:00:36,318 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 20:00:36,327 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 20:00:36,330 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 20:00:36,333 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 20:00:36,336 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 20:00:36,339 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 20:00:36,340 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 20:00:36,341 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 20:00:36,341 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 20:00:36,344 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 20:00:36,346 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 20:00:36,347 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 20:00:36,349 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 20:00:36,351 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 20:00:36,352 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 20:00:36,360 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 20:00:36,362 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 20:00:36,363 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 20:00:36,364 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 20:00:36,365 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 20:00:36,377 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 20:00:36,381 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 20:00:36,381 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 20:00:36,382 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 20:00:36,382 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 20:00:36,387 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 20:00:36,387 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 20:00:36,388 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 20:00:36,388 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 20:00:36,392 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 20:00:36,393 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 20:00:36,394 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 20:00:36,396 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 20:00:36,396 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 20:00:36,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 20:00:36,397 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 20:00:36,398 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 20:00:36,400 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 20:00:36,439 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 20:00:36,440 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 20:00:36,442 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 20:00:36,442 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 20:00:36,442 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 20:00:36,442 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 20:00:36,443 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 20:00:36,443 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 20:00:36,443 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 20:00:36,443 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 20:00:36,444 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 20:00:36,444 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 20:00:36,445 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 20:00:36,445 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 20:00:36,445 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 20:00:36,445 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 20:00:36,446 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 20:00:36,446 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 20:00:36,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 20:00:36,446 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 20:00:36,447 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 20:00:36,447 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 20:00:36,447 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 20:00:36,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 20:00:36,447 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 20:00:36,448 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 20:00:36,448 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-18 20:00:36,448 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=HIGHLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=HIGHLEXORDER; [2020-08-18 20:00:36,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 20:00:36,793 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 20:00:36,800 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 20:00:36,801 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 20:00:36,802 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 20:00:36,803 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--ti--wlcore--wlcore_spi.ko-entry_point.cil.out.i [2020-08-18 20:00:36,863 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b015965cd/310b967404994ac3a89819864d4278d5/FLAG5a3c2b828 [2020-08-18 20:00:37,648 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 20:00:37,649 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--ti--wlcore--wlcore_spi.ko-entry_point.cil.out.i [2020-08-18 20:00:37,706 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b015965cd/310b967404994ac3a89819864d4278d5/FLAG5a3c2b828 [2020-08-18 20:00:38,213 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b015965cd/310b967404994ac3a89819864d4278d5 [2020-08-18 20:00:38,222 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 20:00:38,224 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 20:00:38,225 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 20:00:38,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 20:00:38,229 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 20:00:38,230 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:00:38" (1/1) ... [2020-08-18 20:00:38,233 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47e023dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:00:38, skipping insertion in model container [2020-08-18 20:00:38,233 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:00:38" (1/1) ... [2020-08-18 20:00:38,243 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 20:00:38,380 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 20:00:39,791 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:00:39,815 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 20:00:40,210 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:00:40,292 INFO L208 MainTranslator]: Completed translation [2020-08-18 20:00:40,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:00:40 WrapperNode [2020-08-18 20:00:40,293 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 20:00:40,294 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 20:00:40,295 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 20:00:40,295 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 20:00:40,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:00:40" (1/1) ... [2020-08-18 20:00:40,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:00:40" (1/1) ... [2020-08-18 20:00:40,379 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:00:40" (1/1) ... [2020-08-18 20:00:40,380 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:00:40" (1/1) ... [2020-08-18 20:00:40,497 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:00:40" (1/1) ... [2020-08-18 20:00:40,521 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:00:40" (1/1) ... [2020-08-18 20:00:40,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:00:40" (1/1) ... [2020-08-18 20:00:40,562 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 20:00:40,566 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 20:00:40,566 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 20:00:40,566 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 20:00:40,568 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:00:40" (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 20:00:40,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 20:00:40,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 20:00:40,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2020-08-18 20:00:40,673 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2020-08-18 20:00:40,674 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2020-08-18 20:00:40,674 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2020-08-18 20:00:40,676 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2020-08-18 20:00:40,676 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2020-08-18 20:00:40,676 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 20:00:40,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2020-08-18 20:00:40,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2020-08-18 20:00:40,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2020-08-18 20:00:40,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ulong [2020-08-18 20:00:40,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2020-08-18 20:00:40,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2020-08-18 20:00:40,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2020-08-18 20:00:40,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_trap [2020-08-18 20:00:40,683 INFO L138 BoogieDeclarations]: Found implementation of procedure to_spi_device [2020-08-18 20:00:40,683 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_set_drvdata [2020-08-18 20:00:40,684 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_get_drvdata [2020-08-18 20:00:40,684 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_unregister_driver [2020-08-18 20:00:40,685 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_message_init [2020-08-18 20:00:40,685 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_message_add_tail [2020-08-18 20:00:40,685 INFO L138 BoogieDeclarations]: Found implementation of procedure wl12xx_spi_reset [2020-08-18 20:00:40,686 INFO L138 BoogieDeclarations]: Found implementation of procedure wl12xx_spi_init [2020-08-18 20:00:40,686 INFO L138 BoogieDeclarations]: Found implementation of procedure wl12xx_spi_read_busy [2020-08-18 20:00:40,686 INFO L138 BoogieDeclarations]: Found implementation of procedure wl12xx_spi_raw_read [2020-08-18 20:00:40,687 INFO L138 BoogieDeclarations]: Found implementation of procedure wl12xx_spi_raw_write [2020-08-18 20:00:40,687 INFO L138 BoogieDeclarations]: Found implementation of procedure wl1271_probe [2020-08-18 20:00:40,688 INFO L138 BoogieDeclarations]: Found implementation of procedure wl1271_remove [2020-08-18 20:00:40,688 INFO L138 BoogieDeclarations]: Found implementation of procedure wl1271_spi_driver_init [2020-08-18 20:00:40,688 INFO L138 BoogieDeclarations]: Found implementation of procedure wl1271_spi_driver_exit [2020-08-18 20:00:40,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize_wl1271_if_operations_2 [2020-08-18 20:00:40,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize_spi_driver_1 [2020-08-18 20:00:40,689 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 20:00:40,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2020-08-18 20:00:40,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_get_intfdata [2020-08-18 20:00:40,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata [2020-08-18 20:00:40,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_put_intf [2020-08-18 20:00:40,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2020-08-18 20:00:40,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_fill_int_urb [2020-08-18 20:00:40,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_fill_bulk_urb [2020-08-18 20:00:40,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2020-08-18 20:00:40,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_get_dev [2020-08-18 20:00:40,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_put_dev [2020-08-18 20:00:40,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_get_interface [2020-08-18 20:00:40,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_put_interface [2020-08-18 20:00:40,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_serial_register [2020-08-18 20:00:40,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_serial_deregister [2020-08-18 20:00:40,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2020-08-18 20:00:40,694 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2020-08-18 20:00:40,694 INFO L138 BoogieDeclarations]: Found implementation of procedure crc7 [2020-08-18 20:00:40,694 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2020-08-18 20:00:40,694 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2020-08-18 20:00:40,695 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_set_drvdata [2020-08-18 20:00:40,695 INFO L138 BoogieDeclarations]: Found implementation of procedure driver_unregister [2020-08-18 20:00:40,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2020-08-18 20:00:40,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_release_2 [2020-08-18 20:00:40,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_setup_2 [2020-08-18 20:00:40,765 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_device_add [2020-08-18 20:00:40,765 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_device_add_data [2020-08-18 20:00:40,765 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_device_add_resources [2020-08-18 20:00:40,765 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_device_alloc [2020-08-18 20:00:40,765 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_device_put [2020-08-18 20:00:40,765 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_device_unregister [2020-08-18 20:00:40,765 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_register_driver [2020-08-18 20:00:40,766 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_setup [2020-08-18 20:00:40,766 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_sync [2020-08-18 20:00:40,766 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2020-08-18 20:00:40,766 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2020-08-18 20:00:40,767 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2020-08-18 20:00:40,767 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-08-18 20:00:40,767 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 20:00:40,767 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2020-08-18 20:00:40,767 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2020-08-18 20:00:40,769 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2020-08-18 20:00:40,769 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2020-08-18 20:00:40,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 20:00:40,770 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2020-08-18 20:00:40,770 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2020-08-18 20:00:40,770 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 20:00:40,770 INFO L130 BoogieDeclarations]: Found specification of procedure driver_unregister [2020-08-18 20:00:40,773 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2020-08-18 20:00:40,773 INFO L130 BoogieDeclarations]: Found specification of procedure dev_set_drvdata [2020-08-18 20:00:40,774 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2020-08-18 20:00:40,774 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2020-08-18 20:00:40,774 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2020-08-18 20:00:40,774 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2020-08-18 20:00:40,774 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2020-08-18 20:00:40,775 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2020-08-18 20:00:40,775 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2020-08-18 20:00:40,775 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 20:00:40,775 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-18 20:00:40,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 20:00:40,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_size_t [2020-08-18 20:00:40,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2020-08-18 20:00:40,778 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 20:00:40,778 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 20:00:40,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 20:00:40,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-08-18 20:00:40,779 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2020-08-18 20:00:40,779 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ulong [2020-08-18 20:00:40,779 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2020-08-18 20:00:40,779 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2020-08-18 20:00:40,779 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_trap [2020-08-18 20:00:40,780 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize_wl1271_if_operations_2 [2020-08-18 20:00:40,780 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize_spi_driver_1 [2020-08-18 20:00:40,780 INFO L130 BoogieDeclarations]: Found specification of procedure crc7 [2020-08-18 20:00:40,780 INFO L130 BoogieDeclarations]: Found specification of procedure to_spi_device [2020-08-18 20:00:40,781 INFO L130 BoogieDeclarations]: Found specification of procedure spi_set_drvdata [2020-08-18 20:00:40,781 INFO L130 BoogieDeclarations]: Found specification of procedure spi_get_drvdata [2020-08-18 20:00:40,781 INFO L130 BoogieDeclarations]: Found specification of procedure spi_register_driver [2020-08-18 20:00:40,781 INFO L130 BoogieDeclarations]: Found specification of procedure spi_unregister_driver [2020-08-18 20:00:40,782 INFO L130 BoogieDeclarations]: Found specification of procedure spi_message_init [2020-08-18 20:00:40,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2020-08-18 20:00:40,783 INFO L130 BoogieDeclarations]: Found specification of procedure spi_message_add_tail [2020-08-18 20:00:40,783 INFO L130 BoogieDeclarations]: Found specification of procedure spi_setup [2020-08-18 20:00:40,783 INFO L130 BoogieDeclarations]: Found specification of procedure spi_sync [2020-08-18 20:00:40,784 INFO L130 BoogieDeclarations]: Found specification of procedure platform_device_unregister [2020-08-18 20:00:40,784 INFO L130 BoogieDeclarations]: Found specification of procedure platform_device_alloc [2020-08-18 20:00:40,784 INFO L130 BoogieDeclarations]: Found specification of procedure platform_device_add_resources [2020-08-18 20:00:40,786 INFO L130 BoogieDeclarations]: Found specification of procedure platform_device_add_data [2020-08-18 20:00:40,786 INFO L130 BoogieDeclarations]: Found specification of procedure platform_device_add [2020-08-18 20:00:40,786 INFO L130 BoogieDeclarations]: Found specification of procedure platform_device_put [2020-08-18 20:00:40,786 INFO L130 BoogieDeclarations]: Found specification of procedure wl12xx_spi_reset [2020-08-18 20:00:40,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 20:00:40,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 20:00:40,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 20:00:40,789 INFO L130 BoogieDeclarations]: Found specification of procedure wl12xx_spi_init [2020-08-18 20:00:40,789 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 20:00:40,789 INFO L130 BoogieDeclarations]: Found specification of procedure wl12xx_spi_read_busy [2020-08-18 20:00:40,789 INFO L130 BoogieDeclarations]: Found specification of procedure wl12xx_spi_raw_read [2020-08-18 20:00:40,790 INFO L130 BoogieDeclarations]: Found specification of procedure wl12xx_spi_raw_write [2020-08-18 20:00:40,792 INFO L130 BoogieDeclarations]: Found specification of procedure wl1271_probe [2020-08-18 20:00:40,794 INFO L130 BoogieDeclarations]: Found specification of procedure wl1271_remove [2020-08-18 20:00:40,794 INFO L130 BoogieDeclarations]: Found specification of procedure wl1271_spi_driver_init [2020-08-18 20:00:40,795 INFO L130 BoogieDeclarations]: Found specification of procedure wl1271_spi_driver_exit [2020-08-18 20:00:40,795 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2020-08-18 20:00:40,795 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_release_2 [2020-08-18 20:00:40,795 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2020-08-18 20:00:40,795 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_setup_2 [2020-08-18 20:00:40,795 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 20:00:40,795 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2020-08-18 20:00:40,795 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_get_intfdata [2020-08-18 20:00:40,795 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata [2020-08-18 20:00:40,796 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_put_intf [2020-08-18 20:00:40,796 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2020-08-18 20:00:40,796 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_fill_int_urb [2020-08-18 20:00:40,796 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_fill_bulk_urb [2020-08-18 20:00:40,796 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2020-08-18 20:00:40,797 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2020-08-18 20:00:40,797 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_get_dev [2020-08-18 20:00:40,797 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_put_dev [2020-08-18 20:00:40,797 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_get_interface [2020-08-18 20:00:40,797 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_put_interface [2020-08-18 20:00:40,798 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_serial_register [2020-08-18 20:00:40,798 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_serial_deregister [2020-08-18 20:00:40,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-08-18 20:00:40,798 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 20:00:40,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 20:00:40,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 20:00:40,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-08-18 20:00:40,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 20:00:41,743 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2020-08-18 20:00:42,478 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2020-08-18 20:00:43,011 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 20:00:43,011 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 20:00:43,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:00:43 BoogieIcfgContainer [2020-08-18 20:00:43,019 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 20:00:43,020 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 20:00:43,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 20:00:43,023 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 20:00:43,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 08:00:38" (1/3) ... [2020-08-18 20:00:43,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@314d7978 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:00:43, skipping insertion in model container [2020-08-18 20:00:43,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:00:40" (2/3) ... [2020-08-18 20:00:43,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@314d7978 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:00:43, skipping insertion in model container [2020-08-18 20:00:43,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:00:43" (3/3) ... [2020-08-18 20:00:43,027 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 20:00:43,037 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 20:00:43,046 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 20:00:43,060 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 20:00:43,088 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 20:00:43,089 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 20:00:43,089 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 20:00:43,089 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 20:00:43,089 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 20:00:43,089 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 20:00:43,089 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 20:00:43,090 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 20:00:43,120 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states. [2020-08-18 20:00:43,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-18 20:00:43,132 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:00:43,133 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 20:00:43,134 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:00:43,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:00:43,141 INFO L82 PathProgramCache]: Analyzing trace with hash -2051707004, now seen corresponding path program 1 times [2020-08-18 20:00:43,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:00:43,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917373262] [2020-08-18 20:00:43,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:00:43,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:00:44,109 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:00:44,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:00:44,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:00:44,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:00:44,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:00:44,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:00:44,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:00:44,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:00:44,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:00:44,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 20:00:44,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:00:44,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 20:00:44,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:00:44,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 20:00:44,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:00:44,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:00:44,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:00:44,285 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 20:00:44,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917373262] [2020-08-18 20:00:44,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:00:44,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 20:00:44,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693298064] [2020-08-18 20:00:44,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 20:00:44,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:00:44,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 20:00:44,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 20:00:44,313 INFO L87 Difference]: Start difference. First operand 469 states. Second operand 7 states. [2020-08-18 20:00:44,671 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-18 20:00:45,438 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-08-18 20:00:45,776 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-08-18 20:00:52,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:00:52,598 INFO L93 Difference]: Finished difference Result 945 states and 1293 transitions. [2020-08-18 20:00:52,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 20:00:52,600 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-08-18 20:00:52,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:00:52,621 INFO L225 Difference]: With dead ends: 945 [2020-08-18 20:00:52,621 INFO L226 Difference]: Without dead ends: 492 [2020-08-18 20:00:52,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-08-18 20:00:52,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2020-08-18 20:00:52,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 437. [2020-08-18 20:00:52,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2020-08-18 20:00:52,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 559 transitions. [2020-08-18 20:00:52,768 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 559 transitions. Word has length 52 [2020-08-18 20:00:52,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:00:52,769 INFO L479 AbstractCegarLoop]: Abstraction has 437 states and 559 transitions. [2020-08-18 20:00:52,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 20:00:52,770 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 559 transitions. [2020-08-18 20:00:52,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-18 20:00:52,774 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:00:52,775 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 20:00:52,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 20:00:52,775 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:00:52,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:00:52,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1503436246, now seen corresponding path program 1 times [2020-08-18 20:00:52,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:00:52,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691350013] [2020-08-18 20:00:52,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:00:52,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:00:53,192 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:00:53,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:00:53,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:00:53,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:00:53,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:00:53,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:00:53,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:00:53,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:00:53,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:00:53,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 20:00:53,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:00:53,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 20:00:53,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:00:53,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 20:00:53,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:00:53,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:00:53,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:00:53,398 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 20:00:53,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691350013] [2020-08-18 20:00:53,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:00:53,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 20:00:53,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370962717] [2020-08-18 20:00:53,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 20:00:53,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:00:53,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 20:00:53,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 20:00:53,403 INFO L87 Difference]: Start difference. First operand 437 states and 559 transitions. Second operand 6 states. [2020-08-18 20:00:53,679 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-18 20:00:54,517 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-08-18 20:00:55,835 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 20:01:02,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:01:02,550 INFO L93 Difference]: Finished difference Result 1313 states and 1710 transitions. [2020-08-18 20:01:02,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 20:01:02,551 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-08-18 20:01:02,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:01:02,567 INFO L225 Difference]: With dead ends: 1313 [2020-08-18 20:01:02,567 INFO L226 Difference]: Without dead ends: 893 [2020-08-18 20:01:02,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-08-18 20:01:02,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2020-08-18 20:01:02,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 796. [2020-08-18 20:01:02,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 796 states. [2020-08-18 20:01:02,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1025 transitions. [2020-08-18 20:01:02,692 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1025 transitions. Word has length 54 [2020-08-18 20:01:02,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:01:02,692 INFO L479 AbstractCegarLoop]: Abstraction has 796 states and 1025 transitions. [2020-08-18 20:01:02,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 20:01:02,693 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1025 transitions. [2020-08-18 20:01:02,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-18 20:01:02,696 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:01:02,696 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 20:01:02,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 20:01:02,696 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:01:02,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:01:02,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1632677837, now seen corresponding path program 1 times [2020-08-18 20:01:02,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:01:02,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983403118] [2020-08-18 20:01:02,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:01:02,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:03,186 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:01:03,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:01:03,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:03,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:01:03,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:03,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:01:03,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:03,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:01:03,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:03,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 20:01:03,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:03,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 20:01:03,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:03,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 20:01:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:03,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:01:03,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:03,353 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 20:01:03,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983403118] [2020-08-18 20:01:03,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:01:03,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 20:01:03,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429014860] [2020-08-18 20:01:03,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 20:01:03,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:01:03,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 20:01:03,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 20:01:03,357 INFO L87 Difference]: Start difference. First operand 796 states and 1025 transitions. Second operand 6 states. [2020-08-18 20:01:03,648 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-18 20:01:04,065 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-08-18 20:01:04,431 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 20:01:09,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:01:09,766 INFO L93 Difference]: Finished difference Result 895 states and 1170 transitions. [2020-08-18 20:01:09,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 20:01:09,766 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-08-18 20:01:09,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:01:09,773 INFO L225 Difference]: With dead ends: 895 [2020-08-18 20:01:09,773 INFO L226 Difference]: Without dead ends: 892 [2020-08-18 20:01:09,774 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 20:01:09,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2020-08-18 20:01:09,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 795. [2020-08-18 20:01:09,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 795 states. [2020-08-18 20:01:09,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1023 transitions. [2020-08-18 20:01:09,864 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1023 transitions. Word has length 58 [2020-08-18 20:01:09,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:01:09,864 INFO L479 AbstractCegarLoop]: Abstraction has 795 states and 1023 transitions. [2020-08-18 20:01:09,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 20:01:09,865 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1023 transitions. [2020-08-18 20:01:09,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-18 20:01:09,867 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:01:09,867 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 20:01:09,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 20:01:09,868 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:01:09,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:01:09,868 INFO L82 PathProgramCache]: Analyzing trace with hash 926229248, now seen corresponding path program 1 times [2020-08-18 20:01:09,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:01:09,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788883701] [2020-08-18 20:01:09,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:01:09,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:10,290 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:01:10,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:01:10,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:10,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:01:10,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:10,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:01:10,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:10,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:01:10,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:10,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 20:01:10,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:10,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 20:01:10,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:10,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 20:01:10,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:10,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:01:10,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:10,574 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 20:01:10,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788883701] [2020-08-18 20:01:10,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:01:10,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 20:01:10,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561795681] [2020-08-18 20:01:10,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 20:01:10,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:01:10,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 20:01:10,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 20:01:10,579 INFO L87 Difference]: Start difference. First operand 795 states and 1023 transitions. Second operand 6 states. [2020-08-18 20:01:10,952 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-18 20:01:11,338 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-08-18 20:01:11,668 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-18 20:01:16,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:01:16,827 INFO L93 Difference]: Finished difference Result 894 states and 1168 transitions. [2020-08-18 20:01:16,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 20:01:16,828 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-08-18 20:01:16,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:01:16,836 INFO L225 Difference]: With dead ends: 894 [2020-08-18 20:01:16,836 INFO L226 Difference]: Without dead ends: 891 [2020-08-18 20:01:16,837 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 20:01:16,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2020-08-18 20:01:16,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 794. [2020-08-18 20:01:16,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 794 states. [2020-08-18 20:01:16,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1021 transitions. [2020-08-18 20:01:16,933 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1021 transitions. Word has length 59 [2020-08-18 20:01:16,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:01:16,934 INFO L479 AbstractCegarLoop]: Abstraction has 794 states and 1021 transitions. [2020-08-18 20:01:16,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 20:01:16,935 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1021 transitions. [2020-08-18 20:01:16,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-18 20:01:16,937 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:01:16,937 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 20:01:16,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 20:01:16,938 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:01:16,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:01:16,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1352024874, now seen corresponding path program 1 times [2020-08-18 20:01:16,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:01:16,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586884841] [2020-08-18 20:01:16,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:01:17,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:17,344 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:01:17,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:01:17,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:17,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:01:17,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:17,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:01:17,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:17,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:01:17,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:17,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 20:01:17,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:17,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 20:01:17,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:17,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 20:01:17,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:17,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:01:17,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:17,492 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 20:01:17,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586884841] [2020-08-18 20:01:17,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:01:17,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 20:01:17,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429243000] [2020-08-18 20:01:17,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 20:01:17,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:01:17,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 20:01:17,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 20:01:17,496 INFO L87 Difference]: Start difference. First operand 794 states and 1021 transitions. Second operand 6 states. [2020-08-18 20:01:17,851 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-18 20:01:18,232 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-08-18 20:01:18,709 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 20:01:24,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:01:24,800 INFO L93 Difference]: Finished difference Result 893 states and 1166 transitions. [2020-08-18 20:01:24,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 20:01:24,801 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-08-18 20:01:24,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:01:24,808 INFO L225 Difference]: With dead ends: 893 [2020-08-18 20:01:24,808 INFO L226 Difference]: Without dead ends: 890 [2020-08-18 20:01:24,809 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 20:01:24,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2020-08-18 20:01:24,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 793. [2020-08-18 20:01:24,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 793 states. [2020-08-18 20:01:24,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1019 transitions. [2020-08-18 20:01:24,903 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1019 transitions. Word has length 60 [2020-08-18 20:01:24,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:01:24,906 INFO L479 AbstractCegarLoop]: Abstraction has 793 states and 1019 transitions. [2020-08-18 20:01:24,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 20:01:24,907 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1019 transitions. [2020-08-18 20:01:24,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 20:01:24,911 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:01:24,911 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 20:01:24,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 20:01:24,911 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:01:24,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:01:24,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1036546243, now seen corresponding path program 1 times [2020-08-18 20:01:24,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:01:24,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794802957] [2020-08-18 20:01:24,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:01:24,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:25,289 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:01:25,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:01:25,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:25,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:01:25,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:25,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:01:25,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:25,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:01:25,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:25,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 20:01:25,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:25,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 20:01:25,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:25,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 20:01:25,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:25,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:01:25,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:25,422 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 20:01:25,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794802957] [2020-08-18 20:01:25,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:01:25,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 20:01:25,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043831223] [2020-08-18 20:01:25,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 20:01:25,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:01:25,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 20:01:25,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 20:01:25,424 INFO L87 Difference]: Start difference. First operand 793 states and 1019 transitions. Second operand 6 states. [2020-08-18 20:01:25,696 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-18 20:01:26,103 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-08-18 20:01:26,443 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-18 20:01:34,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:01:34,103 INFO L93 Difference]: Finished difference Result 892 states and 1164 transitions. [2020-08-18 20:01:34,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 20:01:34,104 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-08-18 20:01:34,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:01:34,110 INFO L225 Difference]: With dead ends: 892 [2020-08-18 20:01:34,110 INFO L226 Difference]: Without dead ends: 889 [2020-08-18 20:01:34,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-08-18 20:01:34,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2020-08-18 20:01:34,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 792. [2020-08-18 20:01:34,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 792 states. [2020-08-18 20:01:34,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1017 transitions. [2020-08-18 20:01:34,205 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1017 transitions. Word has length 61 [2020-08-18 20:01:34,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:01:34,206 INFO L479 AbstractCegarLoop]: Abstraction has 792 states and 1017 transitions. [2020-08-18 20:01:34,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 20:01:34,206 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1017 transitions. [2020-08-18 20:01:34,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-18 20:01:34,210 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:01:34,211 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 20:01:34,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 20:01:34,211 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:01:34,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:01:34,212 INFO L82 PathProgramCache]: Analyzing trace with hash 2067811705, now seen corresponding path program 1 times [2020-08-18 20:01:34,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:01:34,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454683384] [2020-08-18 20:01:34,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:01:34,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:34,579 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-18 20:01:34,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:01:34,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:34,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:01:34,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:34,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 20:01:34,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:34,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-18 20:01:34,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:34,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 20:01:34,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:34,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 20:01:34,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:34,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 20:01:34,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:34,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:01:34,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:34,702 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 20:01:34,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454683384] [2020-08-18 20:01:34,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:01:34,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 20:01:34,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563937857] [2020-08-18 20:01:34,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 20:01:34,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:01:34,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 20:01:34,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 20:01:34,704 INFO L87 Difference]: Start difference. First operand 792 states and 1017 transitions. Second operand 6 states. [2020-08-18 20:01:34,971 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-18 20:01:35,357 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-08-18 20:01:35,673 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 189