./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5b36d44f Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash ac653d5d4bd645822c87d49861fb2a5e304e57a9bdc7e425845f1dc10a0731d2 --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5b36d44 [2021-11-07 12:34:20,395 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 12:34:20,397 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 12:34:20,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 12:34:20,443 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 12:34:20,446 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 12:34:20,447 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 12:34:20,452 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 12:34:20,454 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 12:34:20,458 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 12:34:20,459 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 12:34:20,460 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 12:34:20,461 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 12:34:20,463 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 12:34:20,465 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 12:34:20,468 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 12:34:20,469 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 12:34:20,470 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 12:34:20,471 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 12:34:20,477 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 12:34:20,478 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 12:34:20,480 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 12:34:20,482 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 12:34:20,482 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 12:34:20,488 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 12:34:20,488 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 12:34:20,488 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 12:34:20,490 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 12:34:20,490 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 12:34:20,491 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 12:34:20,492 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 12:34:20,493 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 12:34:20,494 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 12:34:20,495 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 12:34:20,496 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 12:34:20,496 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 12:34:20,496 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 12:34:20,497 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 12:34:20,497 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 12:34:20,498 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 12:34:20,498 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 12:34:20,499 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-07 12:34:20,531 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 12:34:20,531 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 12:34:20,532 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 12:34:20,532 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 12:34:20,533 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 12:34:20,533 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 12:34:20,533 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 12:34:20,533 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 12:34:20,533 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 12:34:20,534 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 12:34:20,535 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 12:34:20,535 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 12:34:20,535 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 12:34:20,535 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 12:34:20,535 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 12:34:20,535 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 12:34:20,536 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 12:34:20,536 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 12:34:20,536 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 12:34:20,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 12:34:20,536 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 12:34:20,536 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 12:34:20,536 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 12:34:20,537 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 12:34:20,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 12:34:20,537 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 12:34:20,538 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 12:34:20,539 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 12:34:20,539 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 12:34:20,540 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac653d5d4bd645822c87d49861fb2a5e304e57a9bdc7e425845f1dc10a0731d2 [2021-11-07 12:34:20,740 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 12:34:20,761 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 12:34:20,764 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 12:34:20,765 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 12:34:20,766 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 12:34:20,767 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i [2021-11-07 12:34:20,846 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ea0575ec/454d6175a9a34bd1bed93ffc5706f427/FLAG9face7725 [2021-11-07 12:34:21,528 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 12:34:21,529 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i [2021-11-07 12:34:21,567 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ea0575ec/454d6175a9a34bd1bed93ffc5706f427/FLAG9face7725 [2021-11-07 12:34:21,865 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ea0575ec/454d6175a9a34bd1bed93ffc5706f427 [2021-11-07 12:34:21,867 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 12:34:21,868 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 12:34:21,871 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 12:34:21,871 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 12:34:21,873 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 12:34:21,874 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:34:21" (1/1) ... [2021-11-07 12:34:21,874 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b6521ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:34:21, skipping insertion in model container [2021-11-07 12:34:21,875 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:34:21" (1/1) ... [2021-11-07 12:34:21,879 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 12:34:21,964 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 12:34:23,230 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i[258672,258685] [2021-11-07 12:34:23,313 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 12:34:23,345 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 12:34:23,658 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i[258672,258685] [2021-11-07 12:34:23,667 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 12:34:23,761 INFO L208 MainTranslator]: Completed translation [2021-11-07 12:34:23,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:34:23 WrapperNode [2021-11-07 12:34:23,762 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 12:34:23,763 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 12:34:23,763 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 12:34:23,764 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 12:34:23,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:34:23" (1/1) ... [2021-11-07 12:34:23,867 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:34:23" (1/1) ... [2021-11-07 12:34:24,085 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 12:34:24,086 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 12:34:24,086 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 12:34:24,087 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 12:34:24,093 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:34:23" (1/1) ... [2021-11-07 12:34:24,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:34:23" (1/1) ... [2021-11-07 12:34:24,146 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:34:23" (1/1) ... [2021-11-07 12:34:24,146 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:34:23" (1/1) ... [2021-11-07 12:34:24,315 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:34:23" (1/1) ... [2021-11-07 12:34:24,336 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:34:23" (1/1) ... [2021-11-07 12:34:24,433 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:34:23" (1/1) ... [2021-11-07 12:34:24,491 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 12:34:24,502 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 12:34:24,502 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 12:34:24,503 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 12:34:24,504 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:34:23" (1/1) ... [2021-11-07 12:34:24,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 12:34:24,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 12:34:24,606 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 12:34:24,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 12:34:24,696 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_write_start [2021-11-07 12:34:24,696 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_write_start [2021-11-07 12:34:24,696 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2021-11-07 12:34:24,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2021-11-07 12:34:24,696 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2021-11-07 12:34:24,696 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2021-11-07 12:34:24,696 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_dtr_rts [2021-11-07 12:34:24,697 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_dtr_rts [2021-11-07 12:34:24,697 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_remove [2021-11-07 12:34:24,697 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_remove [2021-11-07 12:34:24,697 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_write [2021-11-07 12:34:24,697 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_write [2021-11-07 12:34:24,697 INFO L130 BoogieDeclarations]: Found specification of procedure serial_chars_in_buffer [2021-11-07 12:34:24,697 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_chars_in_buffer [2021-11-07 12:34:24,697 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_activate [2021-11-07 12:34:24,697 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_activate [2021-11-07 12:34:24,698 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_suspend [2021-11-07 12:34:24,698 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_suspend [2021-11-07 12:34:24,698 INFO L130 BoogieDeclarations]: Found specification of procedure serial_ioctl [2021-11-07 12:34:24,698 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_ioctl [2021-11-07 12:34:24,698 INFO L130 BoogieDeclarations]: Found specification of procedure serial_write_room [2021-11-07 12:34:24,698 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_write_room [2021-11-07 12:34:24,698 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~VOID [2021-11-07 12:34:24,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~VOID [2021-11-07 12:34:24,699 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 12:34:24,699 INFO L130 BoogieDeclarations]: Found specification of procedure serial_unthrottle [2021-11-07 12:34:24,699 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_unthrottle [2021-11-07 12:34:24,699 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_probe [2021-11-07 12:34:24,699 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_probe [2021-11-07 12:34:24,699 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 12:34:24,699 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2021-11-07 12:34:24,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2021-11-07 12:34:24,699 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2021-11-07 12:34:24,700 INFO L130 BoogieDeclarations]: Found specification of procedure serial_get_icount [2021-11-07 12:34:24,700 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_get_icount [2021-11-07 12:34:24,700 INFO L130 BoogieDeclarations]: Found specification of procedure serial_throttle [2021-11-07 12:34:24,700 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_throttle [2021-11-07 12:34:24,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 12:34:24,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 12:34:24,700 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~X~int~TO~int [2021-11-07 12:34:24,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~X~int~TO~int [2021-11-07 12:34:24,700 INFO L130 BoogieDeclarations]: Found specification of procedure serial_cleanup [2021-11-07 12:34:24,701 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_cleanup [2021-11-07 12:34:24,701 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_carrier_raised [2021-11-07 12:34:24,701 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_carrier_raised [2021-11-07 12:34:24,701 INFO L130 BoogieDeclarations]: Found specification of procedure serial_tiocmget [2021-11-07 12:34:24,701 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_tiocmget [2021-11-07 12:34:24,701 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_probe [2021-11-07 12:34:24,701 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_probe [2021-11-07 12:34:24,701 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_reset_resume [2021-11-07 12:34:24,701 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_reset_resume [2021-11-07 12:34:24,702 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_read_bulk_callback [2021-11-07 12:34:24,702 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_read_bulk_callback [2021-11-07 12:34:24,702 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 12:34:24,702 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_shutdown [2021-11-07 12:34:24,702 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_shutdown [2021-11-07 12:34:24,702 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~pm_message_t~0~TO~int [2021-11-07 12:34:24,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~pm_message_t~0~TO~int [2021-11-07 12:34:24,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 12:34:24,703 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_resume [2021-11-07 12:34:24,703 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_resume [2021-11-07 12:34:24,703 INFO L130 BoogieDeclarations]: Found specification of procedure single_release [2021-11-07 12:34:24,703 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2021-11-07 12:34:24,703 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2021-11-07 12:34:24,703 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_disconnect [2021-11-07 12:34:24,703 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_disconnect [2021-11-07 12:34:24,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 12:34:24,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 12:34:24,704 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-07 12:34:24,704 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-07 12:34:24,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-07 12:34:24,704 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-07 12:34:24,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-07 12:34:24,704 INFO L130 BoogieDeclarations]: Found specification of procedure serial_tiocmset [2021-11-07 12:34:24,704 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_tiocmset [2021-11-07 12:34:24,704 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_put [2021-11-07 12:34:24,704 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_put [2021-11-07 12:34:24,705 INFO L130 BoogieDeclarations]: Found specification of procedure serial_write [2021-11-07 12:34:24,705 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_write [2021-11-07 12:34:24,705 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_serial [2021-11-07 12:34:24,705 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_serial [2021-11-07 12:34:24,705 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-07 12:34:24,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-07 12:34:24,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 12:34:24,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 12:34:24,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 12:34:46,227 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 12:34:46,228 INFO L299 CfgBuilder]: Removed 1549 assume(true) statements. [2021-11-07 12:34:46,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:34:46 BoogieIcfgContainer [2021-11-07 12:34:46,233 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 12:34:46,235 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 12:34:46,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 12:34:46,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 12:34:46,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:34:21" (1/3) ... [2021-11-07 12:34:46,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@253672c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:34:46, skipping insertion in model container [2021-11-07 12:34:46,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:34:23" (2/3) ... [2021-11-07 12:34:46,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@253672c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:34:46, skipping insertion in model container [2021-11-07 12:34:46,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:34:46" (3/3) ... [2021-11-07 12:34:46,242 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i [2021-11-07 12:34:46,249 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 12:34:46,250 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 46 error locations. [2021-11-07 12:34:46,302 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 12:34:46,309 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 12:34:46,310 INFO L340 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2021-11-07 12:34:46,354 INFO L276 IsEmpty]: Start isEmpty. Operand has 1814 states, 1643 states have (on average 1.3694461351186853) internal successors, (2250), 1701 states have internal predecessors, (2250), 88 states have call successors, (88), 36 states have call predecessors, (88), 36 states have return successors, (88), 78 states have call predecessors, (88), 88 states have call successors, (88) [2021-11-07 12:34:46,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 12:34:46,359 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 12:34:46,359 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 12:34:46,360 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION === [serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_port_dtr_rtsErr1ASSERT_VIOLATIONERROR_FUNCTION, serial_chars_in_bufferErr0ASSERT_VIOLATIONERROR_FUNCTION (and 43 more)] === [2021-11-07 12:34:46,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 12:34:46,364 INFO L85 PathProgramCache]: Analyzing trace with hash -673943287, now seen corresponding path program 1 times [2021-11-07 12:34:46,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 12:34:46,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110005861] [2021-11-07 12:34:46,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 12:34:46,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 12:34:46,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 12:34:47,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 12:34:47,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 12:34:47,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110005861] [2021-11-07 12:34:47,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110005861] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 12:34:47,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 12:34:47,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 12:34:47,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693559324] [2021-11-07 12:34:47,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 12:34:47,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 12:34:47,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 12:34:47,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 12:34:47,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 12:34:47,108 INFO L87 Difference]: Start difference. First operand has 1814 states, 1643 states have (on average 1.3694461351186853) internal successors, (2250), 1701 states have internal predecessors, (2250), 88 states have call successors, (88), 36 states have call predecessors, (88), 36 states have return successors, (88), 78 states have call predecessors, (88), 88 states have call successors, (88) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 12:34:49,201 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 12:34:49,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 12:34:49,593 INFO L93 Difference]: Finished difference Result 5055 states and 7003 transitions. [2021-11-07 12:34:49,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 12:34:49,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-07 12:34:49,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 12:34:49,628 INFO L225 Difference]: With dead ends: 5055 [2021-11-07 12:34:49,628 INFO L226 Difference]: Without dead ends: 3243 [2021-11-07 12:34:49,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.96ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 12:34:49,648 INFO L933 BasicCegarLoop]: 3215 mSDtfsCounter, 2239 mSDsluCounter, 1987 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 38 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2156.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2239 SdHoareTripleChecker+Valid, 5202 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 28.06ms SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2253.08ms IncrementalHoareTripleChecker+Time [2021-11-07 12:34:49,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2239 Valid, 5202 Invalid, 99 Unknown, 0 Unchecked, 28.06ms Time], IncrementalHoareTripleChecker [38 Valid, 60 Invalid, 1 Unknown, 0 Unchecked, 2253.08ms Time] [2021-11-07 12:34:49,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3243 states. [2021-11-07 12:34:49,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3243 to 3193. [2021-11-07 12:34:49,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3193 states, 2910 states have (on average 1.3298969072164948) internal successors, (3870), 2978 states have internal predecessors, (3870), 168 states have call successors, (168), 72 states have call predecessors, (168), 69 states have return successors, (239), 146 states have call predecessors, (239), 168 states have call successors, (239) [2021-11-07 12:34:49,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3193 states to 3193 states and 4277 transitions. [2021-11-07 12:34:49,799 INFO L78 Accepts]: Start accepts. Automaton has 3193 states and 4277 transitions. Word has length 15 [2021-11-07 12:34:49,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 12:34:49,799 INFO L470 AbstractCegarLoop]: Abstraction has 3193 states and 4277 transitions. [2021-11-07 12:34:49,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 12:34:49,800 INFO L276 IsEmpty]: Start isEmpty. Operand 3193 states and 4277 transitions. [2021-11-07 12:34:49,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 12:34:49,800 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 12:34:49,800 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 12:34:49,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 12:34:49,801 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION === [serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_port_dtr_rtsErr1ASSERT_VIOLATIONERROR_FUNCTION, serial_chars_in_bufferErr0ASSERT_VIOLATIONERROR_FUNCTION (and 43 more)] === [2021-11-07 12:34:49,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 12:34:49,801 INFO L85 PathProgramCache]: Analyzing trace with hash 582596825, now seen corresponding path program 1 times [2021-11-07 12:34:49,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 12:34:49,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115088956] [2021-11-07 12:34:49,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 12:34:49,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 12:34:49,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 12:34:50,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 12:34:50,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 12:34:50,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115088956] [2021-11-07 12:34:50,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115088956] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 12:34:50,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 12:34:50,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 12:34:50,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712416434] [2021-11-07 12:34:50,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 12:34:50,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 12:34:50,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 12:34:50,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 12:34:50,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 12:34:50,111 INFO L87 Difference]: Start difference. First operand 3193 states and 4277 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 12:34:52,176 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 12:34:52,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 12:34:52,355 INFO L93 Difference]: Finished difference Result 3193 states and 4277 transitions. [2021-11-07 12:34:52,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 12:34:52,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-07 12:34:52,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 12:34:52,372 INFO L225 Difference]: With dead ends: 3193 [2021-11-07 12:34:52,372 INFO L226 Difference]: Without dead ends: 3191 [2021-11-07 12:34:52,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.72ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 12:34:52,377 INFO L933 BasicCegarLoop]: 2351 mSDtfsCounter, 2338 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2062.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2338 SdHoareTripleChecker+Valid, 2351 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.94ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2164.25ms IncrementalHoareTripleChecker+Time [2021-11-07 12:34:52,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2338 Valid, 2351 Invalid, 2 Unknown, 0 Unchecked, 5.94ms Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 2164.25ms Time] [2021-11-07 12:34:52,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3191 states. [2021-11-07 12:34:52,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3191 to 3191. [2021-11-07 12:34:52,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3191 states, 2909 states have (on average 1.3296665520797526) internal successors, (3868), 2976 states have internal predecessors, (3868), 168 states have call successors, (168), 72 states have call predecessors, (168), 69 states have return successors, (239), 146 states have call predecessors, (239), 168 states have call successors, (239) [2021-11-07 12:34:52,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3191 states to 3191 states and 4275 transitions. [2021-11-07 12:34:52,497 INFO L78 Accepts]: Start accepts. Automaton has 3191 states and 4275 transitions. Word has length 16 [2021-11-07 12:34:52,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 12:34:52,497 INFO L470 AbstractCegarLoop]: Abstraction has 3191 states and 4275 transitions. [2021-11-07 12:34:52,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 12:34:52,498 INFO L276 IsEmpty]: Start isEmpty. Operand 3191 states and 4275 transitions. [2021-11-07 12:34:52,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 12:34:52,499 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 12:34:52,499 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 12:34:52,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 12:34:52,500 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION === [serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_port_dtr_rtsErr1ASSERT_VIOLATIONERROR_FUNCTION, serial_chars_in_bufferErr0ASSERT_VIOLATIONERROR_FUNCTION (and 43 more)] === [2021-11-07 12:34:52,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 12:34:52,501 INFO L85 PathProgramCache]: Analyzing trace with hash 880634643, now seen corresponding path program 1 times [2021-11-07 12:34:52,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 12:34:52,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793861505] [2021-11-07 12:34:52,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 12:34:52,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 12:34:52,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 12:34:52,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 12:34:52,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 12:34:52,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793861505] [2021-11-07 12:34:52,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793861505] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 12:34:52,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 12:34:52,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 12:34:52,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361646135] [2021-11-07 12:34:52,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 12:34:52,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 12:34:52,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 12:34:52,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 12:34:52,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 12:34:52,724 INFO L87 Difference]: Start difference. First operand 3191 states and 4275 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 12:34:54,784 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 12:34:54,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 12:34:54,959 INFO L93 Difference]: Finished difference Result 3191 states and 4275 transitions. [2021-11-07 12:34:54,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 12:34:54,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 12:34:54,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 12:34:54,974 INFO L225 Difference]: With dead ends: 3191 [2021-11-07 12:34:54,975 INFO L226 Difference]: Without dead ends: 3189 [2021-11-07 12:34:54,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.21ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 12:34:54,979 INFO L933 BasicCegarLoop]: 2349 mSDtfsCounter, 2335 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2059.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2335 SdHoareTripleChecker+Valid, 2349 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.84ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2156.37ms IncrementalHoareTripleChecker+Time [2021-11-07 12:34:54,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2335 Valid, 2349 Invalid, 2 Unknown, 0 Unchecked, 5.84ms Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 2156.37ms Time] [2021-11-07 12:34:54,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3189 states. [2021-11-07 12:34:55,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3189 to 3189. [2021-11-07 12:34:55,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3189 states, 2908 states have (on average 1.3294360385144428) internal successors, (3866), 2974 states have internal predecessors, (3866), 168 states have call successors, (168), 72 states have call predecessors, (168), 69 states have return successors, (239), 146 states have call predecessors, (239), 168 states have call successors, (239) [2021-11-07 12:34:55,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3189 states to 3189 states and 4273 transitions. [2021-11-07 12:34:55,073 INFO L78 Accepts]: Start accepts. Automaton has 3189 states and 4273 transitions. Word has length 17 [2021-11-07 12:34:55,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 12:34:55,073 INFO L470 AbstractCegarLoop]: Abstraction has 3189 states and 4273 transitions. [2021-11-07 12:34:55,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 12:34:55,075 INFO L276 IsEmpty]: Start isEmpty. Operand 3189 states and 4273 transitions. [2021-11-07 12:34:55,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 12:34:55,075 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 12:34:55,076 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 12:34:55,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 12:34:55,076 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_port_dtr_rtsErr1ASSERT_VIOLATIONERROR_FUNCTION, serial_chars_in_bufferErr0ASSERT_VIOLATIONERROR_FUNCTION (and 43 more)] === [2021-11-07 12:34:55,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 12:34:55,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1529872419, now seen corresponding path program 1 times [2021-11-07 12:34:55,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 12:34:55,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933561550] [2021-11-07 12:34:55,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 12:34:55,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 12:34:55,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 12:34:55,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 12:34:55,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 12:34:55,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933561550] [2021-11-07 12:34:55,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933561550] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 12:34:55,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 12:34:55,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 12:34:55,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641964189] [2021-11-07 12:34:55,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 12:34:55,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 12:34:55,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 12:34:55,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 12:34:55,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 12:34:55,283 INFO L87 Difference]: Start difference. First operand 3189 states and 4273 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 12:34:57,345 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 12:34:57,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 12:34:57,570 INFO L93 Difference]: Finished difference Result 3189 states and 4273 transitions. [2021-11-07 12:34:57,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 12:34:57,571 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-07 12:34:57,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 12:34:57,583 INFO L225 Difference]: With dead ends: 3189 [2021-11-07 12:34:57,583 INFO L226 Difference]: Without dead ends: 3160 [2021-11-07 12:34:57,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.62ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 12:34:57,585 INFO L933 BasicCegarLoop]: 2321 mSDtfsCounter, 2014 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 21 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2109.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2014 SdHoareTripleChecker+Valid, 2576 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.33ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2216.04ms IncrementalHoareTripleChecker+Time [2021-11-07 12:34:57,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2014 Valid, 2576 Invalid, 64 Unknown, 0 Unchecked, 4.33ms Time], IncrementalHoareTripleChecker [21 Valid, 42 Invalid, 1 Unknown, 0 Unchecked, 2216.04ms Time] [2021-11-07 12:34:57,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3160 states. [2021-11-07 12:34:57,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3160 to 3160. [2021-11-07 12:34:57,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3160 states, 2889 states have (on average 1.3250259605399792) internal successors, (3828), 2945 states have internal predecessors, (3828), 168 states have call successors, (168), 72 states have call predecessors, (168), 69 states have return successors, (239), 146 states have call predecessors, (239), 168 states have call successors, (239) [2021-11-07 12:34:57,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3160 states to 3160 states and 4235 transitions. [2021-11-07 12:34:57,666 INFO L78 Accepts]: Start accepts. Automaton has 3160 states and 4235 transitions. Word has length 18 [2021-11-07 12:34:57,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 12:34:57,666 INFO L470 AbstractCegarLoop]: Abstraction has 3160 states and 4235 transitions. [2021-11-07 12:34:57,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 12:34:57,667 INFO L276 IsEmpty]: Start isEmpty. Operand 3160 states and 4235 transitions. [2021-11-07 12:34:57,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 12:34:57,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 12:34:57,673 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 12:34:57,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 12:34:57,673 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting serial_port_dtr_rtsErr1ASSERT_VIOLATIONERROR_FUNCTION === [serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_port_dtr_rtsErr1ASSERT_VIOLATIONERROR_FUNCTION, serial_chars_in_bufferErr0ASSERT_VIOLATIONERROR_FUNCTION (and 43 more)] === [2021-11-07 12:34:57,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 12:34:57,674 INFO L85 PathProgramCache]: Analyzing trace with hash -989379772, now seen corresponding path program 1 times [2021-11-07 12:34:57,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 12:34:57,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053827966] [2021-11-07 12:34:57,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 12:34:57,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 12:34:57,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 12:34:57,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 12:34:57,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 12:34:57,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053827966] [2021-11-07 12:34:57,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053827966] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 12:34:57,874 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 12:34:57,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 12:34:57,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798092276] [2021-11-07 12:34:57,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 12:34:57,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 12:34:57,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 12:34:57,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 12:34:57,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 12:34:57,875 INFO L87 Difference]: Start difference. First operand 3160 states and 4235 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 12:34:57,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 12:34:57,995 INFO L93 Difference]: Finished difference Result 6179 states and 8289 transitions. [2021-11-07 12:34:57,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 12:34:57,996 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-07 12:34:57,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 12:34:58,014 INFO L225 Difference]: With dead ends: 6179 [2021-11-07 12:34:58,015 INFO L226 Difference]: Without dead ends: 3160 [2021-11-07 12:34:58,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.26ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 12:34:58,030 INFO L933 BasicCegarLoop]: 2325 mSDtfsCounter, 1 mSDsluCounter, 4644 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6969 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.22ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.23ms IncrementalHoareTripleChecker+Time [2021-11-07 12:34:58,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 6969 Invalid, 8 Unknown, 0 Unchecked, 9.22ms Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 7.23ms Time] [2021-11-07 12:34:58,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3160 states. [2021-11-07 12:34:58,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3160 to 3160. [2021-11-07 12:34:58,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3160 states, 2889 states have (on average 1.3246798200069227) internal successors, (3827), 2945 states have internal predecessors, (3827), 168 states have call successors, (168), 72 states have call predecessors, (168), 69 states have return successors, (239), 146 states have call predecessors, (239), 168 states have call successors, (239) [2021-11-07 12:34:58,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3160 states to 3160 states and 4234 transitions. [2021-11-07 12:34:58,120 INFO L78 Accepts]: Start accepts. Automaton has 3160 states and 4234 transitions. Word has length 30 [2021-11-07 12:34:58,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 12:34:58,120 INFO L470 AbstractCegarLoop]: Abstraction has 3160 states and 4234 transitions. [2021-11-07 12:34:58,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 12:34:58,120 INFO L276 IsEmpty]: Start isEmpty. Operand 3160 states and 4234 transitions. [2021-11-07 12:34:58,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 12:34:58,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 12:34:58,123 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 12:34:58,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 12:34:58,123 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting serial_port_dtr_rtsErr1ASSERT_VIOLATIONERROR_FUNCTION === [serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_port_dtr_rtsErr1ASSERT_VIOLATIONERROR_FUNCTION, serial_chars_in_bufferErr0ASSERT_VIOLATIONERROR_FUNCTION (and 43 more)] === [2021-11-07 12:34:58,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 12:34:58,124 INFO L85 PathProgramCache]: Analyzing trace with hash -51816062, now seen corresponding path program 1 times [2021-11-07 12:34:58,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 12:34:58,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959250459] [2021-11-07 12:34:58,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 12:34:58,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 12:34:58,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 12:34:58,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 12:34:58,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 12:34:58,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959250459] [2021-11-07 12:34:58,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959250459] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 12:34:58,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 12:34:58,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 12:34:58,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936874839] [2021-11-07 12:34:58,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 12:34:58,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 12:34:58,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 12:34:58,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 12:34:58,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 12:34:58,298 INFO L87 Difference]: Start difference. First operand 3160 states and 4234 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 12:34:58,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 12:34:58,383 INFO L93 Difference]: Finished difference Result 6306 states and 8452 transitions. [2021-11-07 12:34:58,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 12:34:58,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-07 12:34:58,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 12:34:58,398 INFO L225 Difference]: With dead ends: 6306 [2021-11-07 12:34:58,399 INFO L226 Difference]: Without dead ends: 3162 [2021-11-07 12:34:58,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.67ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 12:34:58,416 INFO L933 BasicCegarLoop]: 2323 mSDtfsCounter, 1 mSDsluCounter, 2320 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 4643 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.85ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.66ms IncrementalHoareTripleChecker+Time [2021-11-07 12:34:58,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 4643 Invalid, 6 Unknown, 0 Unchecked, 3.85ms Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 8.66ms Time] [2021-11-07 12:34:58,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3162 states. [2021-11-07 12:34:58,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3162 to 3161. [2021-11-07 12:34:58,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3161 states, 2890 states have (on average 1.324567474048443) internal successors, (3828), 2946 states have internal predecessors, (3828), 168 states have call successors, (168), 72 states have call predecessors, (168), 69 states have return successors, (239), 146 states have call predecessors, (239), 168 states have call successors, (239) [2021-11-07 12:34:58,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3161 states to 3161 states and 4235 transitions. [2021-11-07 12:34:58,508 INFO L78 Accepts]: Start accepts. Automaton has 3161 states and 4235 transitions. Word has length 35 [2021-11-07 12:34:58,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 12:34:58,508 INFO L470 AbstractCegarLoop]: Abstraction has 3161 states and 4235 transitions. [2021-11-07 12:34:58,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 12:34:58,509 INFO L276 IsEmpty]: Start isEmpty. Operand 3161 states and 4235 transitions. [2021-11-07 12:34:58,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-07 12:34:58,511 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 12:34:58,512 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 12:34:58,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 12:34:58,512 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting serial_port_dtr_rtsErr1ASSERT_VIOLATIONERROR_FUNCTION === [serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_port_dtr_rtsErr1ASSERT_VIOLATIONERROR_FUNCTION, serial_chars_in_bufferErr0ASSERT_VIOLATIONERROR_FUNCTION (and 43 more)] === [2021-11-07 12:34:58,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 12:34:58,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1856353438, now seen corresponding path program 1 times [2021-11-07 12:34:58,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 12:34:58,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689463821] [2021-11-07 12:34:58,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 12:34:58,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 12:34:58,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 12:34:58,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 12:34:58,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 12:34:58,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689463821] [2021-11-07 12:34:58,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689463821] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 12:34:58,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832295350] [2021-11-07 12:34:58,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 12:34:58,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 12:34:58,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 12:34:58,810 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 12:34:58,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 12:35:00,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 12:35:00,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 3587 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 12:35:00,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 12:35:00,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 12:35:00,480 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 12:35:00,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832295350] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 12:35:00,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 12:35:00,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-07 12:35:00,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94534348] [2021-11-07 12:35:00,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 12:35:00,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 12:35:00,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 12:35:00,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 12:35:00,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 12:35:00,482 INFO L87 Difference]: Start difference. First operand 3161 states and 4235 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 12:35:02,538 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 12:35:02,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 12:35:02,794 INFO L93 Difference]: Finished difference Result 6178 states and 8312 transitions. [2021-11-07 12:35:02,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 12:35:02,795 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-07 12:35:02,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 12:35:02,808 INFO L225 Difference]: With dead ends: 6178 [2021-11-07 12:35:02,808 INFO L226 Difference]: Without dead ends: 3161 [2021-11-07 12:35:02,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 6.62ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 12:35:02,825 INFO L933 BasicCegarLoop]: 3412 mSDtfsCounter, 1978 mSDsluCounter, 2127 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 27 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2099.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1978 SdHoareTripleChecker+Valid, 5539 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.00ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2206.79ms IncrementalHoareTripleChecker+Time [2021-11-07 12:35:02,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1978 Valid, 5539 Invalid, 78 Unknown, 0 Unchecked, 7.00ms Time], IncrementalHoareTripleChecker [27 Valid, 50 Invalid, 1 Unknown, 0 Unchecked, 2206.79ms Time] [2021-11-07 12:35:02,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3161 states. [2021-11-07 12:35:02,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3161 to 3141. [2021-11-07 12:35:02,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3141 states, 2877 states have (on average 1.3187347931873479) internal successors, (3794), 2928 states have internal predecessors, (3794), 168 states have call successors, (168), 72 states have call predecessors, (168), 69 states have return successors, (175), 144 states have call predecessors, (175), 162 states have call successors, (175) [2021-11-07 12:35:02,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3141 states to 3141 states and 4137 transitions. [2021-11-07 12:35:02,919 INFO L78 Accepts]: Start accepts. Automaton has 3141 states and 4137 transitions. Word has length 37 [2021-11-07 12:35:02,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 12:35:02,921 INFO L470 AbstractCegarLoop]: Abstraction has 3141 states and 4137 transitions. [2021-11-07 12:35:02,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 12:35:02,922 INFO L276 IsEmpty]: Start isEmpty. Operand 3141 states and 4137 transitions. [2021-11-07 12:35:02,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 12:35:02,923 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 12:35:02,923 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-07 12:35:02,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-07 12:35:03,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 12:35:03,148 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION === [serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_port_dtr_rtsErr1ASSERT_VIOLATIONERROR_FUNCTION, serial_chars_in_bufferErr0ASSERT_VIOLATIONERROR_FUNCTION (and 43 more)] === [2021-11-07 12:35:03,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 12:35:03,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1469233975, now seen corresponding path program 1 times [2021-11-07 12:35:03,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 12:35:03,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207102296] [2021-11-07 12:35:03,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 12:35:03,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 12:35:03,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 12:35:03,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 12:35:03,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 12:35:03,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207102296] [2021-11-07 12:35:03,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207102296] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 12:35:03,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111284681] [2021-11-07 12:35:03,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 12:35:03,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 12:35:03,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 12:35:03,357 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 12:35:03,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 12:35:04,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 12:35:04,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 3649 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 12:35:04,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 12:35:04,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 12:35:04,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 12:35:05,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 12:35:05,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111284681] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 12:35:05,006 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 12:35:05,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-07 12:35:05,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384842619] [2021-11-07 12:35:05,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-07 12:35:05,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 12:35:05,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 12:35:05,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 12:35:05,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-07 12:35:05,008 INFO L87 Difference]: Start difference. First operand 3141 states and 4137 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 12:35:05,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 12:35:05,101 INFO L93 Difference]: Finished difference Result 6271 states and 8263 transitions. [2021-11-07 12:35:05,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 12:35:05,102 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-07 12:35:05,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 12:35:05,115 INFO L225 Difference]: With dead ends: 6271 [2021-11-07 12:35:05,115 INFO L226 Difference]: Without dead ends: 3147 [2021-11-07 12:35:05,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 13.83ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-07 12:35:05,128 INFO L933 BasicCegarLoop]: 2309 mSDtfsCounter, 4 mSDsluCounter, 6918 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 9227 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.55ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.71ms IncrementalHoareTripleChecker+Time [2021-11-07 12:35:05,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 9227 Invalid, 19 Unknown, 0 Unchecked, 5.55ms Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 14.71ms Time] [2021-11-07 12:35:05,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3147 states. [2021-11-07 12:35:05,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3147 to 3147. [2021-11-07 12:35:05,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3147 states, 2883 states have (on average 1.3180714533472078) internal successors, (3800), 2934 states have internal predecessors, (3800), 168 states have call successors, (168), 72 states have call predecessors, (168), 69 states have return successors, (175), 144 states have call predecessors, (175), 162 states have call successors, (175) [2021-11-07 12:35:05,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3147 states to 3147 states and 4143 transitions. [2021-11-07 12:35:05,207 INFO L78 Accepts]: Start accepts. Automaton has 3147 states and 4143 transitions. Word has length 41 [2021-11-07 12:35:05,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 12:35:05,208 INFO L470 AbstractCegarLoop]: Abstraction has 3147 states and 4143 transitions. [2021-11-07 12:35:05,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 12:35:05,209 INFO L276 IsEmpty]: Start isEmpty. Operand 3147 states and 4143 transitions. [2021-11-07 12:35:05,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 12:35:05,210 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 12:35:05,211 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-07 12:35:05,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 12:35:05,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-07 12:35:05,436 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION === [serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_port_dtr_rtsErr1ASSERT_VIOLATIONERROR_FUNCTION, serial_chars_in_bufferErr0ASSERT_VIOLATIONERROR_FUNCTION (and 43 more)] === [2021-11-07 12:35:05,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 12:35:05,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1199245173, now seen corresponding path program 2 times [2021-11-07 12:35:05,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 12:35:05,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251113874] [2021-11-07 12:35:05,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 12:35:05,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 12:35:05,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 12:35:05,996 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 12:35:05,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 12:35:05,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251113874] [2021-11-07 12:35:05,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251113874] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 12:35:05,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137544531] [2021-11-07 12:35:05,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 12:35:05,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 12:35:05,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 12:35:05,998 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 12:35:05,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 12:35:07,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-07 12:35:07,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 12:35:07,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 3550 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 12:35:07,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 12:35:07,613 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 12:35:07,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 12:35:07,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137544531] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 12:35:07,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 12:35:07,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-11-07 12:35:07,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239944441] [2021-11-07 12:35:07,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 12:35:07,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 12:35:07,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 12:35:07,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 12:35:07,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-07 12:35:07,616 INFO L87 Difference]: Start difference. First operand 3147 states and 4143 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 12:35:09,632 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 12:35:09,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 12:35:09,750 INFO L93 Difference]: Finished difference Result 6146 states and 8099 transitions. [2021-11-07 12:35:09,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 12:35:09,751 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-07 12:35:09,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 12:35:09,775 INFO L225 Difference]: With dead ends: 6146 [2021-11-07 12:35:09,776 INFO L226 Difference]: Without dead ends: 3141 [2021-11-07 12:35:09,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 55.92ms TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-07 12:35:09,789 INFO L933 BasicCegarLoop]: 2309 mSDtfsCounter, 7 mSDsluCounter, 6906 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2023.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 9215 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.74ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2049.03ms IncrementalHoareTripleChecker+Time [2021-11-07 12:35:09,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 9215 Invalid, 21 Unknown, 0 Unchecked, 5.74ms Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 1 Unknown, 0 Unchecked, 2049.03ms Time] [2021-11-07 12:35:09,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3141 states. [2021-11-07 12:35:09,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3141 to 3141. [2021-11-07 12:35:09,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3141 states, 2877 states have (on average 1.3173444560305874) internal successors, (3790), 2928 states have internal predecessors, (3790), 168 states have call successors, (168), 72 states have call predecessors, (168), 69 states have return successors, (175), 144 states have call predecessors, (175), 162 states have call successors, (175) [2021-11-07 12:35:09,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3141 states to 3141 states and 4133 transitions. [2021-11-07 12:35:09,856 INFO L78 Accepts]: Start accepts. Automaton has 3141 states and 4133 transitions. Word has length 47 [2021-11-07 12:35:09,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 12:35:09,856 INFO L470 AbstractCegarLoop]: Abstraction has 3141 states and 4133 transitions. [2021-11-07 12:35:09,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 12:35:09,857 INFO L276 IsEmpty]: Start isEmpty. Operand 3141 states and 4133 transitions. [2021-11-07 12:35:09,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 12:35:09,858 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 12:35:09,859 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-07 12:35:09,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 12:35:10,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 12:35:10,075 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION === [serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_port_dtr_rtsErr1ASSERT_VIOLATIONERROR_FUNCTION, serial_chars_in_bufferErr0ASSERT_VIOLATIONERROR_FUNCTION (and 43 more)] === [2021-11-07 12:35:10,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 12:35:10,076 INFO L85 PathProgramCache]: Analyzing trace with hash -497428031, now seen corresponding path program 1 times [2021-11-07 12:35:10,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 12:35:10,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066312382] [2021-11-07 12:35:10,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 12:35:10,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 12:35:10,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 12:35:10,504 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 12:35:10,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 12:35:10,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066312382] [2021-11-07 12:35:10,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066312382] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 12:35:10,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53340043] [2021-11-07 12:35:10,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 12:35:10,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 12:35:10,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 12:35:10,506 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 12:35:10,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 12:35:12,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 12:35:12,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 3904 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 12:35:12,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 12:35:12,210 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 12:35:12,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 12:35:12,354 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 12:35:12,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53340043] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 12:35:12,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 12:35:12,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-11-07 12:35:12,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360374674] [2021-11-07 12:35:12,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-07 12:35:12,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 12:35:12,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 12:35:12,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 12:35:12,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-07 12:35:12,357 INFO L87 Difference]: Start difference. First operand 3141 states and 4133 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 12:35:12,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 12:35:12,466 INFO L93 Difference]: Finished difference Result 6271 states and 8258 transitions. [2021-11-07 12:35:12,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 12:35:12,467 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-07 12:35:12,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 12:35:12,477 INFO L225 Difference]: With dead ends: 6271 [2021-11-07 12:35:12,477 INFO L226 Difference]: Without dead ends: 3153 [2021-11-07 12:35:12,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 51.88ms TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-07 12:35:12,486 INFO L933 BasicCegarLoop]: 2299 mSDtfsCounter, 10 mSDsluCounter, 11480 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 13779 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.76ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.33ms IncrementalHoareTripleChecker+Time [2021-11-07 12:35:12,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 13779 Invalid, 39 Unknown, 0 Unchecked, 7.76ms Time], IncrementalHoareTripleChecker [8 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 27.33ms Time] [2021-11-07 12:35:12,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3153 states. [2021-11-07 12:35:12,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3153 to 3153. [2021-11-07 12:35:12,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3153 states, 2889 states have (on average 1.3160263066805122) internal successors, (3802), 2940 states have internal predecessors, (3802), 168 states have call successors, (168), 72 states have call predecessors, (168), 69 states have return successors, (175), 144 states have call predecessors, (175), 162 states have call successors, (175) [2021-11-07 12:35:12,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3153 states to 3153 states and 4145 transitions. [2021-11-07 12:35:12,550 INFO L78 Accepts]: Start accepts. Automaton has 3153 states and 4145 transitions. Word has length 59 [2021-11-07 12:35:12,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 12:35:12,550 INFO L470 AbstractCegarLoop]: Abstraction has 3153 states and 4145 transitions. [2021-11-07 12:35:12,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 12:35:12,551 INFO L276 IsEmpty]: Start isEmpty. Operand 3153 states and 4145 transitions. [2021-11-07 12:35:12,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 12:35:12,552 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 12:35:12,552 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 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] [2021-11-07 12:35:12,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 12:35:12,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 12:35:12,775 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION === [serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_port_dtr_rtsErr1ASSERT_VIOLATIONERROR_FUNCTION, serial_chars_in_bufferErr0ASSERT_VIOLATIONERROR_FUNCTION (and 43 more)] === [2021-11-07 12:35:12,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 12:35:12,776 INFO L85 PathProgramCache]: Analyzing trace with hash -853316759, now seen corresponding path program 2 times [2021-11-07 12:35:12,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 12:35:12,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070544794] [2021-11-07 12:35:12,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 12:35:12,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 12:35:13,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 12:35:13,348 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 12:35:13,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 12:35:13,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070544794] [2021-11-07 12:35:13,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070544794] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 12:35:13,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799826425] [2021-11-07 12:35:13,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 12:35:13,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 12:35:13,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 12:35:13,351 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 12:35:13,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 12:35:14,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-07 12:35:14,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 12:35:14,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 3787 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 12:35:14,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 12:35:15,020 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-07 12:35:15,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 12:35:15,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799826425] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 12:35:15,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 12:35:15,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 16 [2021-11-07 12:35:15,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795775254] [2021-11-07 12:35:15,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 12:35:15,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 12:35:15,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 12:35:15,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 12:35:15,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-11-07 12:35:15,022 INFO L87 Difference]: Start difference. First operand 3153 states and 4145 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 12:35:17,033 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 12:35:17,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 12:35:17,159 INFO L93 Difference]: Finished difference Result 6155 states and 8104 transitions. [2021-11-07 12:35:17,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 12:35:17,159 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 12:35:17,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 12:35:17,170 INFO L225 Difference]: With dead ends: 6155 [2021-11-07 12:35:17,170 INFO L226 Difference]: Without dead ends: 3153 [2021-11-07 12:35:17,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 108.59ms TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-11-07 12:35:17,180 INFO L933 BasicCegarLoop]: 2299 mSDtfsCounter, 3 mSDsluCounter, 6884 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2023.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9183 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.32ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2045.55ms IncrementalHoareTripleChecker+Time [2021-11-07 12:35:17,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 9183 Invalid, 20 Unknown, 0 Unchecked, 6.32ms Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 1 Unknown, 0 Unchecked, 2045.55ms Time] [2021-11-07 12:35:17,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3153 states. [2021-11-07 12:35:17,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3153 to 3153. [2021-11-07 12:35:17,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3153 states, 2889 states have (on average 1.315680166147456) internal successors, (3801), 2940 states have internal predecessors, (3801), 168 states have call successors, (168), 72 states have call predecessors, (168), 69 states have return successors, (175), 144 states have call predecessors, (175), 162 states have call successors, (175) [2021-11-07 12:35:17,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3153 states to 3153 states and 4144 transitions. [2021-11-07 12:35:17,248 INFO L78 Accepts]: Start accepts. Automaton has 3153 states and 4144 transitions. Word has length 71 [2021-11-07 12:35:17,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 12:35:17,248 INFO L470 AbstractCegarLoop]: Abstraction has 3153 states and 4144 transitions. [2021-11-07 12:35:17,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 12:35:17,248 INFO L276 IsEmpty]: Start isEmpty. Operand 3153 states and 4144 transitions. [2021-11-07 12:35:17,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 12:35:17,249 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 12:35:17,249 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 12:35:17,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-07 12:35:17,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-07 12:35:17,468 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_port_dtr_rtsErr1ASSERT_VIOLATIONERROR_FUNCTION, serial_chars_in_bufferErr0ASSERT_VIOLATIONERROR_FUNCTION (and 43 more)] === [2021-11-07 12:35:17,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 12:35:17,469 INFO L85 PathProgramCache]: Analyzing trace with hash -757799748, now seen corresponding path program 1 times [2021-11-07 12:35:17,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 12:35:17,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372659900] [2021-11-07 12:35:17,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 12:35:17,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 12:35:17,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 12:35:17,715 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-07 12:35:17,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 12:35:17,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372659900] [2021-11-07 12:35:17,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372659900] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 12:35:17,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 12:35:17,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 12:35:17,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171468242] [2021-11-07 12:35:17,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 12:35:17,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 12:35:17,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 12:35:17,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 12:35:17,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 12:35:17,718 INFO L87 Difference]: Start difference. First operand 3153 states and 4144 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 12:35:19,833 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 12:35:20,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 12:35:20,032 INFO L93 Difference]: Finished difference Result 3153 states and 4144 transitions. [2021-11-07 12:35:20,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 12:35:20,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 12:35:20,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 12:35:20,041 INFO L225 Difference]: With dead ends: 3153 [2021-11-07 12:35:20,042 INFO L226 Difference]: Without dead ends: 3108 [2021-11-07 12:35:20,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.46ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 12:35:20,044 INFO L933 BasicCegarLoop]: 2264 mSDtfsCounter, 242 mSDsluCounter, 1995 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 19 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2140.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 4259 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.47ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2261.13ms IncrementalHoareTripleChecker+Time [2021-11-07 12:35:20,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 4259 Invalid, 54 Unknown, 0 Unchecked, 6.47ms Time], IncrementalHoareTripleChecker [19 Valid, 34 Invalid, 1 Unknown, 0 Unchecked, 2261.13ms Time] [2021-11-07 12:35:20,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3108 states. [2021-11-07 12:35:20,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3108 to 3108. [2021-11-07 12:35:20,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3108 states, 2856 states have (on average 1.309873949579832) internal successors, (3741), 2895 states have internal predecessors, (3741), 168 states have call successors, (168), 72 states have call predecessors, (168), 69 states have return successors, (175), 144 states have call predecessors, (175), 162 states have call successors, (175) [2021-11-07 12:35:20,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3108 states to 3108 states and 4084 transitions. [2021-11-07 12:35:20,209 INFO L78 Accepts]: Start accepts. Automaton has 3108 states and 4084 transitions. Word has length 71 [2021-11-07 12:35:20,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 12:35:20,209 INFO L470 AbstractCegarLoop]: Abstraction has 3108 states and 4084 transitions. [2021-11-07 12:35:20,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 12:35:20,209 INFO L276 IsEmpty]: Start isEmpty. Operand 3108 states and 4084 transitions. [2021-11-07 12:35:20,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 12:35:20,210 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 12:35:20,211 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 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, 1, 1, 1, 1] [2021-11-07 12:35:20,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 12:35:20,211 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION === [serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_port_dtr_rtsErr1ASSERT_VIOLATIONERROR_FUNCTION, serial_chars_in_bufferErr0ASSERT_VIOLATIONERROR_FUNCTION (and 43 more)] === [2021-11-07 12:35:20,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 12:35:20,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1627420760, now seen corresponding path program 1 times [2021-11-07 12:35:20,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 12:35:20,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020412981] [2021-11-07 12:35:20,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 12:35:20,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 12:35:20,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 12:35:20,666 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 12:35:20,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 12:35:20,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020412981] [2021-11-07 12:35:20,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020412981] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 12:35:20,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292210022] [2021-11-07 12:35:20,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 12:35:20,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 12:35:20,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 12:35:20,676 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 12:35:20,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 12:35:22,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 12:35:22,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 3991 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 12:35:22,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 12:35:22,417 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 12:35:22,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 12:35:22,695 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 12:35:22,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292210022] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 12:35:22,696 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 12:35:22,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-11-07 12:35:22,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931145118] [2021-11-07 12:35:22,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-07 12:35:22,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-07 12:35:22,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 12:35:22,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-07 12:35:22,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-07 12:35:22,697 INFO L87 Difference]: Start difference. First operand 3108 states and 4084 transitions. Second operand has 25 states, 25 states have (on average 3.84) internal successors, (96), 25 states have internal predecessors, (96), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 12:35:22,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 12:35:22,854 INFO L93 Difference]: Finished difference Result 6205 states and 8166 transitions. [2021-11-07 12:35:22,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 12:35:22,855 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.84) internal successors, (96), 25 states have internal predecessors, (96), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 12:35:22,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 12:35:22,869 INFO L225 Difference]: With dead ends: 6205 [2021-11-07 12:35:22,869 INFO L226 Difference]: Without dead ends: 3132 [2021-11-07 12:35:22,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 236.28ms TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-07 12:35:22,880 INFO L933 BasicCegarLoop]: 2274 mSDtfsCounter, 33 mSDsluCounter, 9084 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 11358 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.53ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.88ms IncrementalHoareTripleChecker+Time [2021-11-07 12:35:22,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 11358 Invalid, 69 Unknown, 0 Unchecked, 9.53ms Time], IncrementalHoareTripleChecker [14 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 52.88ms Time] [2021-11-07 12:35:22,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3132 states. [2021-11-07 12:35:22,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3132 to 3132. [2021-11-07 12:35:22,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3132 states, 2880 states have (on average 1.3072916666666667) internal successors, (3765), 2919 states have internal predecessors, (3765), 168 states have call successors, (168), 72 states have call predecessors, (168), 69 states have return successors, (175), 144 states have call predecessors, (175), 162 states have call successors, (175) [2021-11-07 12:35:22,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3132 states to 3132 states and 4108 transitions. [2021-11-07 12:35:22,952 INFO L78 Accepts]: Start accepts. Automaton has 3132 states and 4108 transitions. Word has length 76 [2021-11-07 12:35:22,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 12:35:22,952 INFO L470 AbstractCegarLoop]: Abstraction has 3132 states and 4108 transitions. [2021-11-07 12:35:22,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.84) internal successors, (96), 25 states have internal predecessors, (96), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 12:35:22,952 INFO L276 IsEmpty]: Start isEmpty. Operand 3132 states and 4108 transitions. [2021-11-07 12:35:22,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 12:35:22,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 12:35:22,957 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 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, 1, 1, 1, 1] [2021-11-07 12:35:22,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 12:35:23,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 12:35:23,171 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION === [serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_port_dtr_rtsErr1ASSERT_VIOLATIONERROR_FUNCTION, serial_chars_in_bufferErr0ASSERT_VIOLATIONERROR_FUNCTION (and 43 more)] === [2021-11-07 12:35:23,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 12:35:23,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1954753112, now seen corresponding path program 2 times [2021-11-07 12:35:23,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 12:35:23,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266698002] [2021-11-07 12:35:23,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 12:35:23,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 12:35:23,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 12:35:23,850 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 12:35:23,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 12:35:23,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266698002] [2021-11-07 12:35:23,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266698002] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 12:35:23,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259809855] [2021-11-07 12:35:23,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 12:35:23,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 12:35:23,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 12:35:23,859 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 12:35:23,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 12:35:25,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-07 12:35:25,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 12:35:25,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 3838 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 12:35:25,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 12:35:25,677 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2021-11-07 12:35:25,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 12:35:25,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259809855] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 12:35:25,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 12:35:25,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [25] total 30 [2021-11-07 12:35:25,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025245984] [2021-11-07 12:35:25,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 12:35:25,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 12:35:25,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 12:35:25,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 12:35:25,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=560, Unknown=0, NotChecked=0, Total=870 [2021-11-07 12:35:25,679 INFO L87 Difference]: Start difference. First operand 3132 states and 4108 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 12:35:27,695 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 12:35:27,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 12:35:27,878 INFO L93 Difference]: Finished difference Result 6093 states and 8011 transitions. [2021-11-07 12:35:27,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 12:35:27,878 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-07 12:35:27,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 12:35:27,889 INFO L225 Difference]: With dead ends: 6093 [2021-11-07 12:35:27,889 INFO L226 Difference]: Without dead ends: 3132 [2021-11-07 12:35:27,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 396.75ms TimeCoverageRelationStatistics Valid=338, Invalid=784, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 12:35:27,898 INFO L933 BasicCegarLoop]: 2272 mSDtfsCounter, 10 mSDsluCounter, 11351 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2030.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 13623 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.11ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2058.04ms IncrementalHoareTripleChecker+Time [2021-11-07 12:35:27,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 13623 Invalid, 32 Unknown, 0 Unchecked, 8.11ms Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 1 Unknown, 0 Unchecked, 2058.04ms Time] [2021-11-07 12:35:27,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3132 states. [2021-11-07 12:35:27,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3132 to 3132. [2021-11-07 12:35:27,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3132 states, 2880 states have (on average 1.3069444444444445) internal successors, (3764), 2919 states have internal predecessors, (3764), 168 states have call successors, (168), 72 states have call predecessors, (168), 69 states have return successors, (175), 144 states have call predecessors, (175), 162 states have call successors, (175) [2021-11-07 12:35:27,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3132 states to 3132 states and 4107 transitions. [2021-11-07 12:35:27,963 INFO L78 Accepts]: Start accepts. Automaton has 3132 states and 4107 transitions. Word has length 100 [2021-11-07 12:35:27,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 12:35:27,963 INFO L470 AbstractCegarLoop]: Abstraction has 3132 states and 4107 transitions. [2021-11-07 12:35:27,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 12:35:27,964 INFO L276 IsEmpty]: Start isEmpty. Operand 3132 states and 4107 transitions. [2021-11-07 12:35:27,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-07 12:35:27,966 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 12:35:27,966 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 12:35:28,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 12:35:28,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 12:35:28,176 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION === [serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_port_dtr_rtsErr1ASSERT_VIOLATIONERROR_FUNCTION, serial_chars_in_bufferErr0ASSERT_VIOLATIONERROR_FUNCTION (and 43 more)] === [2021-11-07 12:35:28,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 12:35:28,176 INFO L85 PathProgramCache]: Analyzing trace with hash 569130284, now seen corresponding path program 1 times [2021-11-07 12:35:28,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 12:35:28,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974833759] [2021-11-07 12:35:28,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 12:35:28,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 12:35:28,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 12:35:28,736 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 12:35:28,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 12:35:28,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974833759] [2021-11-07 12:35:28,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974833759] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 12:35:28,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743093193] [2021-11-07 12:35:28,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 12:35:28,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 12:35:28,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 12:35:28,738 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 12:35:28,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 12:35:30,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 12:35:30,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 4091 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-07 12:35:30,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 12:35:30,529 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 12:35:30,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 12:35:31,248 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 12:35:31,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743093193] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 12:35:31,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 12:35:31,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-11-07 12:35:31,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569255314] [2021-11-07 12:35:31,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-07 12:35:31,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-07 12:35:31,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 12:35:31,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-07 12:35:31,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-07 12:35:31,251 INFO L87 Difference]: Start difference. First operand 3132 states and 4107 transitions. Second operand has 49 states, 49 states have (on average 3.0) internal successors, (147), 49 states have internal predecessors, (147), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 12:35:31,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 12:35:31,622 INFO L93 Difference]: Finished difference Result 6253 states and 8224 transitions. [2021-11-07 12:35:31,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-07 12:35:31,623 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.0) internal successors, (147), 49 states have internal predecessors, (147), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-11-07 12:35:31,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 12:35:31,637 INFO L225 Difference]: With dead ends: 6253 [2021-11-07 12:35:31,637 INFO L226 Difference]: Without dead ends: 3180 [2021-11-07 12:35:31,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 715.57ms TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-07 12:35:31,648 INFO L933 BasicCegarLoop]: 2273 mSDtfsCounter, 69 mSDsluCounter, 6810 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 66.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 9083 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.56ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 114.40ms IncrementalHoareTripleChecker+Time [2021-11-07 12:35:31,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 9083 Invalid, 132 Unknown, 0 Unchecked, 6.56ms Time], IncrementalHoareTripleChecker [31 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 114.40ms Time] [2021-11-07 12:35:31,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3180 states. [2021-11-07 12:35:31,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3180 to 3180. [2021-11-07 12:35:31,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3180 states, 2928 states have (on average 1.3019125683060109) internal successors, (3812), 2967 states have internal predecessors, (3812), 168 states have call successors, (168), 72 states have call predecessors, (168), 69 states have return successors, (175), 144 states have call predecessors, (175), 162 states have call successors, (175) [2021-11-07 12:35:31,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3180 states to 3180 states and 4155 transitions. [2021-11-07 12:35:31,724 INFO L78 Accepts]: Start accepts. Automaton has 3180 states and 4155 transitions. Word has length 103 [2021-11-07 12:35:31,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 12:35:31,725 INFO L470 AbstractCegarLoop]: Abstraction has 3180 states and 4155 transitions. [2021-11-07 12:35:31,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.0) internal successors, (147), 49 states have internal predecessors, (147), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 12:35:31,726 INFO L276 IsEmpty]: Start isEmpty. Operand 3180 states and 4155 transitions. [2021-11-07 12:35:31,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-07 12:35:31,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 12:35:31,728 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 12:35:31,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 12:35:31,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-07 12:35:31,951 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION === [serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_port_dtr_rtsErr1ASSERT_VIOLATIONERROR_FUNCTION, serial_chars_in_bufferErr0ASSERT_VIOLATIONERROR_FUNCTION (and 43 more)] === [2021-11-07 12:35:31,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 12:35:31,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1763683276, now seen corresponding path program 2 times [2021-11-07 12:35:31,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 12:35:31,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474068522] [2021-11-07 12:35:31,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 12:35:31,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 12:35:32,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 12:35:33,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2119 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 12:35:33,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 12:35:33,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474068522] [2021-11-07 12:35:33,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474068522] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 12:35:33,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405163311] [2021-11-07 12:35:33,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 12:35:33,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 12:35:33,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 12:35:33,416 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 12:35:33,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process Killed by 15