/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--ti--wlcore--wlcore_spi.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 01:07:00,639 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 01:07:00,641 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 01:07:00,679 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 01:07:00,681 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 01:07:00,691 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 01:07:00,692 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 01:07:00,695 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 01:07:00,696 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 01:07:00,698 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 01:07:00,699 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 01:07:00,701 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 01:07:00,701 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 01:07:00,706 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 01:07:00,708 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 01:07:00,709 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 01:07:00,711 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 01:07:00,713 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 01:07:00,715 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 01:07:00,720 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 01:07:00,721 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 01:07:00,722 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 01:07:00,723 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 01:07:00,727 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 01:07:00,729 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 01:07:00,729 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 01:07:00,730 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 01:07:00,730 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 01:07:00,731 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 01:07:00,732 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 01:07:00,732 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 01:07:00,732 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 01:07:00,733 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 01:07:00,734 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 01:07:00,735 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 01:07:00,735 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 01:07:00,735 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 01:07:00,736 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 01:07:00,736 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 01:07:00,737 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 01:07:00,737 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 01:07:00,738 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 [2020-08-22 01:07:00,759 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 01:07:00,759 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 01:07:00,760 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 01:07:00,760 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 01:07:00,761 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 01:07:00,761 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 01:07:00,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 01:07:00,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 01:07:00,761 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 01:07:00,762 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 01:07:00,762 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 01:07:00,762 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 01:07:00,762 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 01:07:00,762 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 01:07:00,763 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 01:07:00,763 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 01:07:00,763 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 01:07:00,763 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 01:07:00,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 01:07:00,764 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 01:07:00,764 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 01:07:00,764 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 01:07:00,764 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 01:07:00,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 01:07:00,764 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 01:07:00,765 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 01:07:00,765 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 01:07:00,765 INFO L138 SettingsManager]: * To the following directory=dump/ Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; [2020-08-22 01:07:01,082 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 01:07:01,094 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 01:07:01,097 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 01:07:01,099 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 01:07:01,100 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 01:07:01,100 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--ti--wlcore--wlcore_spi.ko-entry_point.cil.out.i [2020-08-22 01:07:01,158 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/98dc0ec4e/26c3ffe4996743b79138abac83deb04f/FLAG70f89b431 [2020-08-22 01:07:01,966 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 01:07:01,966 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--ti--wlcore--wlcore_spi.ko-entry_point.cil.out.i [2020-08-22 01:07:02,000 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/98dc0ec4e/26c3ffe4996743b79138abac83deb04f/FLAG70f89b431 [2020-08-22 01:07:02,484 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/98dc0ec4e/26c3ffe4996743b79138abac83deb04f [2020-08-22 01:07:02,495 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 01:07:02,496 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 01:07:02,498 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 01:07:02,498 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 01:07:02,501 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 01:07:02,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:07:02" (1/1) ... [2020-08-22 01:07:02,505 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67be94cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:07:02, skipping insertion in model container [2020-08-22 01:07:02,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:07:02" (1/1) ... [2020-08-22 01:07:02,514 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 01:07:02,637 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 01:07:04,108 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:07:04,128 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 01:07:04,367 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:07:04,441 INFO L208 MainTranslator]: Completed translation [2020-08-22 01:07:04,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:07:04 WrapperNode [2020-08-22 01:07:04,441 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 01:07:04,442 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 01:07:04,443 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 01:07:04,443 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 01:07:04,458 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:07:04" (1/1) ... [2020-08-22 01:07:04,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:07:04" (1/1) ... [2020-08-22 01:07:04,491 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:07:04" (1/1) ... [2020-08-22 01:07:04,492 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:07:04" (1/1) ... [2020-08-22 01:07:04,554 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:07:04" (1/1) ... [2020-08-22 01:07:04,565 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:07:04" (1/1) ... [2020-08-22 01:07:04,577 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:07:04" (1/1) ... [2020-08-22 01:07:04,594 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 01:07:04,598 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 01:07:04,598 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 01:07:04,598 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 01:07:04,601 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:07:04" (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 [2020-08-22 01:07:04,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 01:07:04,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 01:07:04,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2020-08-22 01:07:04,682 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2020-08-22 01:07:04,683 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2020-08-22 01:07:04,683 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2020-08-22 01:07:04,684 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2020-08-22 01:07:04,684 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2020-08-22 01:07:04,684 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 01:07:04,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2020-08-22 01:07:04,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2020-08-22 01:07:04,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2020-08-22 01:07:04,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ulong [2020-08-22 01:07:04,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2020-08-22 01:07:04,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2020-08-22 01:07:04,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2020-08-22 01:07:04,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_trap [2020-08-22 01:07:04,688 INFO L138 BoogieDeclarations]: Found implementation of procedure to_spi_device [2020-08-22 01:07:04,689 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_set_drvdata [2020-08-22 01:07:04,689 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_get_drvdata [2020-08-22 01:07:04,689 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_unregister_driver [2020-08-22 01:07:04,689 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_message_init [2020-08-22 01:07:04,690 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_message_add_tail [2020-08-22 01:07:04,690 INFO L138 BoogieDeclarations]: Found implementation of procedure wl12xx_spi_reset [2020-08-22 01:07:04,690 INFO L138 BoogieDeclarations]: Found implementation of procedure wl12xx_spi_init [2020-08-22 01:07:04,690 INFO L138 BoogieDeclarations]: Found implementation of procedure wl12xx_spi_read_busy [2020-08-22 01:07:04,690 INFO L138 BoogieDeclarations]: Found implementation of procedure wl12xx_spi_raw_read [2020-08-22 01:07:04,691 INFO L138 BoogieDeclarations]: Found implementation of procedure wl12xx_spi_raw_write [2020-08-22 01:07:04,691 INFO L138 BoogieDeclarations]: Found implementation of procedure wl1271_probe [2020-08-22 01:07:04,691 INFO L138 BoogieDeclarations]: Found implementation of procedure wl1271_remove [2020-08-22 01:07:04,691 INFO L138 BoogieDeclarations]: Found implementation of procedure wl1271_spi_driver_init [2020-08-22 01:07:04,691 INFO L138 BoogieDeclarations]: Found implementation of procedure wl1271_spi_driver_exit [2020-08-22 01:07:04,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize_wl1271_if_operations_2 [2020-08-22 01:07:04,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize_spi_driver_1 [2020-08-22 01:07:04,692 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 01:07:04,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2020-08-22 01:07:04,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_get_intfdata [2020-08-22 01:07:04,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata [2020-08-22 01:07:04,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_put_intf [2020-08-22 01:07:04,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2020-08-22 01:07:04,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_fill_int_urb [2020-08-22 01:07:04,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_fill_bulk_urb [2020-08-22 01:07:04,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2020-08-22 01:07:04,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_get_dev [2020-08-22 01:07:04,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_put_dev [2020-08-22 01:07:04,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_get_interface [2020-08-22 01:07:04,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_put_interface [2020-08-22 01:07:04,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_serial_register [2020-08-22 01:07:04,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_serial_deregister [2020-08-22 01:07:04,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2020-08-22 01:07:04,695 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2020-08-22 01:07:04,696 INFO L138 BoogieDeclarations]: Found implementation of procedure crc7 [2020-08-22 01:07:04,696 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2020-08-22 01:07:04,696 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2020-08-22 01:07:04,696 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_set_drvdata [2020-08-22 01:07:04,696 INFO L138 BoogieDeclarations]: Found implementation of procedure driver_unregister [2020-08-22 01:07:04,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2020-08-22 01:07:04,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_release_2 [2020-08-22 01:07:04,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_setup_2 [2020-08-22 01:07:04,697 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_device_add [2020-08-22 01:07:04,697 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_device_add_data [2020-08-22 01:07:04,698 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_device_add_resources [2020-08-22 01:07:04,698 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_device_alloc [2020-08-22 01:07:04,698 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_device_put [2020-08-22 01:07:04,698 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_device_unregister [2020-08-22 01:07:04,698 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_register_driver [2020-08-22 01:07:04,698 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_setup [2020-08-22 01:07:04,698 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_sync [2020-08-22 01:07:04,699 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2020-08-22 01:07:04,699 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2020-08-22 01:07:04,699 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2020-08-22 01:07:04,699 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-08-22 01:07:04,699 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 01:07:04,700 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2020-08-22 01:07:04,701 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2020-08-22 01:07:04,701 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2020-08-22 01:07:04,701 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2020-08-22 01:07:04,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 01:07:04,702 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2020-08-22 01:07:04,702 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2020-08-22 01:07:04,702 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 01:07:04,702 INFO L130 BoogieDeclarations]: Found specification of procedure driver_unregister [2020-08-22 01:07:04,702 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2020-08-22 01:07:04,702 INFO L130 BoogieDeclarations]: Found specification of procedure dev_set_drvdata [2020-08-22 01:07:04,703 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2020-08-22 01:07:04,703 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2020-08-22 01:07:04,703 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2020-08-22 01:07:04,703 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2020-08-22 01:07:04,703 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2020-08-22 01:07:04,703 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2020-08-22 01:07:04,703 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2020-08-22 01:07:04,704 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 01:07:04,704 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-22 01:07:04,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 01:07:04,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_size_t [2020-08-22 01:07:04,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2020-08-22 01:07:04,704 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 01:07:04,704 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 01:07:04,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 01:07:04,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-08-22 01:07:04,705 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2020-08-22 01:07:04,705 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ulong [2020-08-22 01:07:04,705 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2020-08-22 01:07:04,705 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2020-08-22 01:07:04,705 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_trap [2020-08-22 01:07:04,706 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize_wl1271_if_operations_2 [2020-08-22 01:07:04,706 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize_spi_driver_1 [2020-08-22 01:07:04,706 INFO L130 BoogieDeclarations]: Found specification of procedure crc7 [2020-08-22 01:07:04,706 INFO L130 BoogieDeclarations]: Found specification of procedure to_spi_device [2020-08-22 01:07:04,706 INFO L130 BoogieDeclarations]: Found specification of procedure spi_set_drvdata [2020-08-22 01:07:04,707 INFO L130 BoogieDeclarations]: Found specification of procedure spi_get_drvdata [2020-08-22 01:07:04,707 INFO L130 BoogieDeclarations]: Found specification of procedure spi_register_driver [2020-08-22 01:07:04,707 INFO L130 BoogieDeclarations]: Found specification of procedure spi_unregister_driver [2020-08-22 01:07:04,707 INFO L130 BoogieDeclarations]: Found specification of procedure spi_message_init [2020-08-22 01:07:04,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2020-08-22 01:07:04,707 INFO L130 BoogieDeclarations]: Found specification of procedure spi_message_add_tail [2020-08-22 01:07:04,708 INFO L130 BoogieDeclarations]: Found specification of procedure spi_setup [2020-08-22 01:07:04,708 INFO L130 BoogieDeclarations]: Found specification of procedure spi_sync [2020-08-22 01:07:04,708 INFO L130 BoogieDeclarations]: Found specification of procedure platform_device_unregister [2020-08-22 01:07:04,708 INFO L130 BoogieDeclarations]: Found specification of procedure platform_device_alloc [2020-08-22 01:07:04,709 INFO L130 BoogieDeclarations]: Found specification of procedure platform_device_add_resources [2020-08-22 01:07:04,709 INFO L130 BoogieDeclarations]: Found specification of procedure platform_device_add_data [2020-08-22 01:07:04,709 INFO L130 BoogieDeclarations]: Found specification of procedure platform_device_add [2020-08-22 01:07:04,709 INFO L130 BoogieDeclarations]: Found specification of procedure platform_device_put [2020-08-22 01:07:04,710 INFO L130 BoogieDeclarations]: Found specification of procedure wl12xx_spi_reset [2020-08-22 01:07:04,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 01:07:04,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 01:07:04,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 01:07:04,712 INFO L130 BoogieDeclarations]: Found specification of procedure wl12xx_spi_init [2020-08-22 01:07:04,712 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 01:07:04,713 INFO L130 BoogieDeclarations]: Found specification of procedure wl12xx_spi_read_busy [2020-08-22 01:07:04,714 INFO L130 BoogieDeclarations]: Found specification of procedure wl12xx_spi_raw_read [2020-08-22 01:07:04,718 INFO L130 BoogieDeclarations]: Found specification of procedure wl12xx_spi_raw_write [2020-08-22 01:07:04,718 INFO L130 BoogieDeclarations]: Found specification of procedure wl1271_probe [2020-08-22 01:07:04,719 INFO L130 BoogieDeclarations]: Found specification of procedure wl1271_remove [2020-08-22 01:07:04,719 INFO L130 BoogieDeclarations]: Found specification of procedure wl1271_spi_driver_init [2020-08-22 01:07:04,719 INFO L130 BoogieDeclarations]: Found specification of procedure wl1271_spi_driver_exit [2020-08-22 01:07:04,720 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2020-08-22 01:07:04,721 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_release_2 [2020-08-22 01:07:04,722 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2020-08-22 01:07:04,722 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_setup_2 [2020-08-22 01:07:04,722 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 01:07:04,722 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2020-08-22 01:07:04,723 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_get_intfdata [2020-08-22 01:07:04,724 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata [2020-08-22 01:07:04,733 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_put_intf [2020-08-22 01:07:04,799 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2020-08-22 01:07:04,799 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_fill_int_urb [2020-08-22 01:07:04,799 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_fill_bulk_urb [2020-08-22 01:07:04,799 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2020-08-22 01:07:04,800 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2020-08-22 01:07:04,800 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_get_dev [2020-08-22 01:07:04,800 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_put_dev [2020-08-22 01:07:04,800 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_get_interface [2020-08-22 01:07:04,801 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_put_interface [2020-08-22 01:07:04,801 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_serial_register [2020-08-22 01:07:04,801 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_serial_deregister [2020-08-22 01:07:04,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-08-22 01:07:04,801 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-22 01:07:04,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 01:07:04,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-22 01:07:04,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-08-22 01:07:04,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 01:07:05,915 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2020-08-22 01:07:06,535 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2020-08-22 01:07:07,025 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 01:07:07,026 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 01:07:07,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:07:07 BoogieIcfgContainer [2020-08-22 01:07:07,033 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 01:07:07,034 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 01:07:07,035 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 01:07:07,038 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 01:07:07,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 01:07:02" (1/3) ... [2020-08-22 01:07:07,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@151c32e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:07:07, skipping insertion in model container [2020-08-22 01:07:07,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:07:04" (2/3) ... [2020-08-22 01:07:07,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@151c32e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:07:07, skipping insertion in model container [2020-08-22 01:07:07,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:07:07" (3/3) ... [2020-08-22 01:07:07,041 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 [2020-08-22 01:07:07,053 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 01:07:07,062 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 01:07:07,078 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 01:07:07,105 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 01:07:07,106 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 01:07:07,106 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 01:07:07,106 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 01:07:07,106 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 01:07:07,106 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 01:07:07,106 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 01:07:07,106 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 01:07:07,135 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states. [2020-08-22 01:07:07,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-22 01:07:07,146 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:07:07,147 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] [2020-08-22 01:07:07,148 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:07:07,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:07:07,154 INFO L82 PathProgramCache]: Analyzing trace with hash -2051707004, now seen corresponding path program 1 times [2020-08-22 01:07:07,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:07:07,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603295492] [2020-08-22 01:07:07,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:07:07,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:08,005 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 01:07:08,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:07:08,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:08,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:07:08,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:08,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:07:08,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:08,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 01:07:08,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:08,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 01:07:08,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:08,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-22 01:07:08,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:08,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-22 01:07:08,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:08,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:07:08,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:08,289 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 01:07:08,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603295492] [2020-08-22 01:07:08,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:07:08,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 01:07:08,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825707105] [2020-08-22 01:07:08,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 01:07:08,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:07:08,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 01:07:08,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 01:07:08,317 INFO L87 Difference]: Start difference. First operand 469 states. Second operand 7 states. [2020-08-22 01:07:08,643 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-22 01:07:09,369 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-08-22 01:07:09,710 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-08-22 01:07:16,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:07:16,522 INFO L93 Difference]: Finished difference Result 945 states and 1293 transitions. [2020-08-22 01:07:16,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 01:07:16,525 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-08-22 01:07:16,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:07:16,544 INFO L225 Difference]: With dead ends: 945 [2020-08-22 01:07:16,544 INFO L226 Difference]: Without dead ends: 492 [2020-08-22 01:07:16,555 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 [2020-08-22 01:07:16,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2020-08-22 01:07:16,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 437. [2020-08-22 01:07:16,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2020-08-22 01:07:16,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 559 transitions. [2020-08-22 01:07:16,697 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 559 transitions. Word has length 52 [2020-08-22 01:07:16,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:07:16,698 INFO L479 AbstractCegarLoop]: Abstraction has 437 states and 559 transitions. [2020-08-22 01:07:16,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 01:07:16,698 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 559 transitions. [2020-08-22 01:07:16,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-22 01:07:16,702 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:07:16,703 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] [2020-08-22 01:07:16,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 01:07:16,703 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:07:16,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:07:16,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1503436246, now seen corresponding path program 1 times [2020-08-22 01:07:16,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:07:16,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627870075] [2020-08-22 01:07:16,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:07:16,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:17,195 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 01:07:17,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:07:17,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:17,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:07:17,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:17,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:07:17,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:17,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 01:07:17,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:17,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 01:07:17,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:17,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 01:07:17,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:17,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-22 01:07:17,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:17,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:07:17,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:17,339 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-22 01:07:17,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627870075] [2020-08-22 01:07:17,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:07:17,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 01:07:17,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490252044] [2020-08-22 01:07:17,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 01:07:17,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:07:17,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 01:07:17,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:07:17,343 INFO L87 Difference]: Start difference. First operand 437 states and 559 transitions. Second operand 6 states. [2020-08-22 01:07:17,641 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-22 01:07:18,492 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-08-22 01:07:20,030 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-22 01:07:28,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:07:28,829 INFO L93 Difference]: Finished difference Result 1313 states and 1710 transitions. [2020-08-22 01:07:28,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 01:07:28,830 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-08-22 01:07:28,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:07:28,841 INFO L225 Difference]: With dead ends: 1313 [2020-08-22 01:07:28,842 INFO L226 Difference]: Without dead ends: 893 [2020-08-22 01:07:28,845 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 [2020-08-22 01:07:28,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2020-08-22 01:07:29,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 796. [2020-08-22 01:07:29,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 796 states. [2020-08-22 01:07:29,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1025 transitions. [2020-08-22 01:07:29,014 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1025 transitions. Word has length 54 [2020-08-22 01:07:29,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:07:29,015 INFO L479 AbstractCegarLoop]: Abstraction has 796 states and 1025 transitions. [2020-08-22 01:07:29,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 01:07:29,015 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1025 transitions. [2020-08-22 01:07:29,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-22 01:07:29,018 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:07:29,019 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] [2020-08-22 01:07:29,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 01:07:29,019 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:07:29,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:07:29,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1632677837, now seen corresponding path program 1 times [2020-08-22 01:07:29,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:07:29,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886501446] [2020-08-22 01:07:29,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:07:29,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:29,433 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 01:07:29,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:07:29,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:29,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:07:29,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:29,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:07:29,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:29,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 01:07:29,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:29,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 01:07:29,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:29,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 01:07:29,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:29,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 01:07:29,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:29,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 01:07:29,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:29,640 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-22 01:07:29,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886501446] [2020-08-22 01:07:29,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:07:29,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 01:07:29,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496560657] [2020-08-22 01:07:29,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 01:07:29,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:07:29,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 01:07:29,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:07:29,643 INFO L87 Difference]: Start difference. First operand 796 states and 1025 transitions. Second operand 6 states. [2020-08-22 01:07:29,935 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-22 01:07:30,325 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-08-22 01:07:30,670 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-22 01:07:38,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:07:38,089 INFO L93 Difference]: Finished difference Result 895 states and 1170 transitions. [2020-08-22 01:07:38,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 01:07:38,090 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-08-22 01:07:38,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:07:38,097 INFO L225 Difference]: With dead ends: 895 [2020-08-22 01:07:38,097 INFO L226 Difference]: Without dead ends: 892 [2020-08-22 01:07:38,098 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 [2020-08-22 01:07:38,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2020-08-22 01:07:38,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 795. [2020-08-22 01:07:38,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 795 states. [2020-08-22 01:07:38,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1023 transitions. [2020-08-22 01:07:38,196 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1023 transitions. Word has length 58 [2020-08-22 01:07:38,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:07:38,197 INFO L479 AbstractCegarLoop]: Abstraction has 795 states and 1023 transitions. [2020-08-22 01:07:38,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 01:07:38,197 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1023 transitions. [2020-08-22 01:07:38,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-22 01:07:38,200 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:07:38,200 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] [2020-08-22 01:07:38,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 01:07:38,201 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:07:38,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:07:38,201 INFO L82 PathProgramCache]: Analyzing trace with hash 926229248, now seen corresponding path program 1 times [2020-08-22 01:07:38,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:07:38,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552663700] [2020-08-22 01:07:38,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:07:38,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:38,695 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 01:07:38,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:07:38,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:38,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:07:38,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:38,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:07:38,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:38,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 01:07:38,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:38,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 01:07:38,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:38,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 01:07:38,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:38,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 01:07:38,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:38,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 01:07:38,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:38,980 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-22 01:07:38,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552663700] [2020-08-22 01:07:38,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:07:38,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 01:07:38,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604648196] [2020-08-22 01:07:38,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 01:07:38,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:07:38,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 01:07:38,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:07:38,984 INFO L87 Difference]: Start difference. First operand 795 states and 1023 transitions. Second operand 6 states. [2020-08-22 01:07:39,281 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-22 01:07:39,695 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-08-22 01:07:40,033 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-08-22 01:07:47,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:07:47,403 INFO L93 Difference]: Finished difference Result 894 states and 1168 transitions. [2020-08-22 01:07:47,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 01:07:47,404 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-08-22 01:07:47,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:07:47,412 INFO L225 Difference]: With dead ends: 894 [2020-08-22 01:07:47,413 INFO L226 Difference]: Without dead ends: 891 [2020-08-22 01:07:47,414 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 [2020-08-22 01:07:47,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2020-08-22 01:07:47,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 794. [2020-08-22 01:07:47,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 794 states. [2020-08-22 01:07:47,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1021 transitions. [2020-08-22 01:07:47,514 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1021 transitions. Word has length 59 [2020-08-22 01:07:47,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:07:47,515 INFO L479 AbstractCegarLoop]: Abstraction has 794 states and 1021 transitions. [2020-08-22 01:07:47,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 01:07:47,515 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1021 transitions. [2020-08-22 01:07:47,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-22 01:07:47,517 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:07:47,517 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] [2020-08-22 01:07:47,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 01:07:47,517 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:07:47,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:07:47,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1352024874, now seen corresponding path program 1 times [2020-08-22 01:07:47,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:07:47,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110685917] [2020-08-22 01:07:47,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:07:47,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:47,895 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 01:07:47,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:07:47,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:47,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:07:47,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:47,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:07:47,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:47,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 01:07:47,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:47,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 01:07:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:48,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 01:07:48,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:48,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 01:07:48,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:48,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 01:07:48,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:48,048 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-22 01:07:48,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110685917] [2020-08-22 01:07:48,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:07:48,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 01:07:48,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119015580] [2020-08-22 01:07:48,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 01:07:48,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:07:48,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 01:07:48,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:07:48,054 INFO L87 Difference]: Start difference. First operand 794 states and 1021 transitions. Second operand 6 states. [2020-08-22 01:07:48,346 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-22 01:07:48,854 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-08-22 01:07:49,209 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-22 01:07:56,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:07:56,199 INFO L93 Difference]: Finished difference Result 893 states and 1166 transitions. [2020-08-22 01:07:56,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 01:07:56,200 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-08-22 01:07:56,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:07:56,209 INFO L225 Difference]: With dead ends: 893 [2020-08-22 01:07:56,209 INFO L226 Difference]: Without dead ends: 890 [2020-08-22 01:07:56,210 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 [2020-08-22 01:07:56,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2020-08-22 01:07:56,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 793. [2020-08-22 01:07:56,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 793 states. [2020-08-22 01:07:56,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1019 transitions. [2020-08-22 01:07:56,307 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1019 transitions. Word has length 60 [2020-08-22 01:07:56,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:07:56,310 INFO L479 AbstractCegarLoop]: Abstraction has 793 states and 1019 transitions. [2020-08-22 01:07:56,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 01:07:56,310 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1019 transitions. [2020-08-22 01:07:56,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-22 01:07:56,313 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:07:56,314 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] [2020-08-22 01:07:56,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 01:07:56,314 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:07:56,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:07:56,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1036546243, now seen corresponding path program 1 times [2020-08-22 01:07:56,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:07:56,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294962385] [2020-08-22 01:07:56,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:07:56,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:56,701 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 01:07:56,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:07:56,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:56,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:07:56,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:56,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:07:56,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:56,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 01:07:56,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:56,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 01:07:56,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:56,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 01:07:56,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:56,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 01:07:56,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:56,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 01:07:56,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:07:56,892 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-22 01:07:56,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294962385] [2020-08-22 01:07:56,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:07:56,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 01:07:56,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834527673] [2020-08-22 01:07:56,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 01:07:56,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:07:56,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 01:07:56,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:07:56,895 INFO L87 Difference]: Start difference. First operand 793 states and 1019 transitions. Second operand 6 states. [2020-08-22 01:07:57,185 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-22 01:07:57,593 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-08-22 01:07:57,937 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-08-22 01:08:03,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:08:03,219 INFO L93 Difference]: Finished difference Result 892 states and 1164 transitions. [2020-08-22 01:08:03,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 01:08:03,220 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-08-22 01:08:03,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:08:03,228 INFO L225 Difference]: With dead ends: 892 [2020-08-22 01:08:03,228 INFO L226 Difference]: Without dead ends: 889 [2020-08-22 01:08:03,229 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 [2020-08-22 01:08:03,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2020-08-22 01:08:03,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 792. [2020-08-22 01:08:03,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 792 states. [2020-08-22 01:08:03,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1017 transitions. [2020-08-22 01:08:03,319 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1017 transitions. Word has length 61 [2020-08-22 01:08:03,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:08:03,319 INFO L479 AbstractCegarLoop]: Abstraction has 792 states and 1017 transitions. [2020-08-22 01:08:03,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 01:08:03,320 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1017 transitions. [2020-08-22 01:08:03,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-22 01:08:03,322 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:08:03,322 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] [2020-08-22 01:08:03,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 01:08:03,323 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:08:03,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:08:03,323 INFO L82 PathProgramCache]: Analyzing trace with hash 2067811705, now seen corresponding path program 1 times [2020-08-22 01:08:03,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:08:03,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010367654] [2020-08-22 01:08:03,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:08:03,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:08:03,717 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-08-22 01:08:03,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:08:03,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:08:03,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 01:08:03,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:08:03,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:08:03,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:08:03,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 01:08:03,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:08:03,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 01:08:03,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:08:03,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 01:08:03,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:08:03,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 01:08:03,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:08:03,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 01:08:03,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:08:03,855 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-22 01:08:03,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010367654] [2020-08-22 01:08:03,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:08:03,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 01:08:03,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55860636] [2020-08-22 01:08:03,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 01:08:03,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:08:03,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 01:08:03,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:08:03,858 INFO L87 Difference]: Start difference. First operand 792 states and 1017 transitions. Second operand 6 states. [2020-08-22 01:08:04,141 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-08-22 01:08:04,522 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-08-22 01:08:04,886 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 189