./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 173e3943 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-dev-173e394 [2021-11-06 13:59:02,218 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 13:59:02,219 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 13:59:02,241 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 13:59:02,242 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 13:59:02,244 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 13:59:02,246 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 13:59:02,248 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 13:59:02,249 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 13:59:02,253 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 13:59:02,254 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 13:59:02,255 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 13:59:02,256 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 13:59:02,257 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 13:59:02,259 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 13:59:02,262 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 13:59:02,263 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 13:59:02,264 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 13:59:02,267 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 13:59:02,268 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 13:59:02,275 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 13:59:02,276 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 13:59:02,278 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 13:59:02,278 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 13:59:02,282 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 13:59:02,284 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 13:59:02,285 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 13:59:02,285 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 13:59:02,285 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 13:59:02,286 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 13:59:02,286 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 13:59:02,286 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 13:59:02,287 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 13:59:02,287 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 13:59:02,288 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 13:59:02,288 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 13:59:02,288 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 13:59:02,289 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 13:59:02,289 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 13:59:02,289 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 13:59:02,290 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 13:59:02,290 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 13:59:02,307 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 13:59:02,308 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 13:59:02,308 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 13:59:02,308 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 13:59:02,309 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 13:59:02,309 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 13:59:02,309 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 13:59:02,310 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 13:59:02,310 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 13:59:02,310 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 13:59:02,310 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 13:59:02,310 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 13:59:02,311 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 13:59:02,311 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 13:59:02,311 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 13:59:02,312 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 13:59:02,312 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 13:59:02,312 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 13:59:02,312 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 13:59:02,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 13:59:02,312 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 13:59:02,313 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 13:59:02,313 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 13:59:02,313 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 13:59:02,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 13:59:02,313 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 13:59:02,313 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 13:59:02,314 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 13:59:02,314 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 13:59:02,314 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac653d5d4bd645822c87d49861fb2a5e304e57a9bdc7e425845f1dc10a0731d2 [2021-11-06 13:59:02,475 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 13:59:02,498 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 13:59:02,501 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 13:59:02,502 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 13:59:02,507 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 13:59:02,508 INFO L432 ainManager$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 [2021-11-06 13:59:02,556 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cac1bc11f/fcde2535baf347cc878f859586d44306/FLAG0fce77b2f [2021-11-06 13:59:03,137 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 13:59:03,138 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 [2021-11-06 13:59:03,173 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cac1bc11f/fcde2535baf347cc878f859586d44306/FLAG0fce77b2f [2021-11-06 13:59:03,580 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cac1bc11f/fcde2535baf347cc878f859586d44306 [2021-11-06 13:59:03,582 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 13:59:03,583 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 13:59:03,584 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 13:59:03,585 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 13:59:03,588 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 13:59:03,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 01:59:03" (1/1) ... [2021-11-06 13:59:03,589 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d061cf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:59:03, skipping insertion in model container [2021-11-06 13:59:03,589 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 01:59:03" (1/1) ... [2021-11-06 13:59:03,594 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 13:59:03,665 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 13:59:04,730 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] [2021-11-06 13:59:04,809 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 13:59:04,828 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 13:59:05,158 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] [2021-11-06 13:59:05,167 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 13:59:05,257 INFO L208 MainTranslator]: Completed translation [2021-11-06 13:59:05,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:59:05 WrapperNode [2021-11-06 13:59:05,257 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 13:59:05,259 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 13:59:05,259 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 13:59:05,260 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 13:59:05,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:59:05" (1/1) ... [2021-11-06 13:59:05,342 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:59:05" (1/1) ... [2021-11-06 13:59:05,557 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 13:59:05,559 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 13:59:05,559 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 13:59:05,559 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 13:59:05,565 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:59:05" (1/1) ... [2021-11-06 13:59:05,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:59:05" (1/1) ... [2021-11-06 13:59:05,629 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:59:05" (1/1) ... [2021-11-06 13:59:05,630 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:59:05" (1/1) ... [2021-11-06 13:59:05,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:59:05" (1/1) ... [2021-11-06 13:59:05,809 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:59:05" (1/1) ... [2021-11-06 13:59:05,839 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:59:05" (1/1) ... [2021-11-06 13:59:05,875 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 13:59:05,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 13:59:05,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 13:59:05,876 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 13:59:05,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:59:05" (1/1) ... [2021-11-06 13:59:05,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 13:59:05,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 13:59:05,898 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) [2021-11-06 13:59:05,915 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 [2021-11-06 13:59:05,924 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_write_start [2021-11-06 13:59:05,924 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_write_start [2021-11-06 13:59:05,925 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2021-11-06 13:59:05,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2021-11-06 13:59:05,925 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2021-11-06 13:59:05,925 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2021-11-06 13:59:05,925 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_dtr_rts [2021-11-06 13:59:05,925 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_dtr_rts [2021-11-06 13:59:05,925 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_remove [2021-11-06 13:59:05,926 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_remove [2021-11-06 13:59:05,926 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_write [2021-11-06 13:59:05,926 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_write [2021-11-06 13:59:05,926 INFO L130 BoogieDeclarations]: Found specification of procedure serial_chars_in_buffer [2021-11-06 13:59:05,926 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_chars_in_buffer [2021-11-06 13:59:05,926 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_activate [2021-11-06 13:59:05,926 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_activate [2021-11-06 13:59:05,926 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_suspend [2021-11-06 13:59:05,927 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_suspend [2021-11-06 13:59:05,927 INFO L130 BoogieDeclarations]: Found specification of procedure serial_ioctl [2021-11-06 13:59:05,927 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_ioctl [2021-11-06 13:59:05,927 INFO L130 BoogieDeclarations]: Found specification of procedure serial_write_room [2021-11-06 13:59:05,927 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_write_room [2021-11-06 13:59:05,927 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~VOID [2021-11-06 13:59:05,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~VOID [2021-11-06 13:59:05,927 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 13:59:05,928 INFO L130 BoogieDeclarations]: Found specification of procedure serial_unthrottle [2021-11-06 13:59:05,928 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_unthrottle [2021-11-06 13:59:05,928 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_probe [2021-11-06 13:59:05,928 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_probe [2021-11-06 13:59:05,928 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 13:59:05,928 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2021-11-06 13:59:05,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2021-11-06 13:59:05,928 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2021-11-06 13:59:05,929 INFO L130 BoogieDeclarations]: Found specification of procedure serial_get_icount [2021-11-06 13:59:05,929 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_get_icount [2021-11-06 13:59:05,929 INFO L130 BoogieDeclarations]: Found specification of procedure serial_throttle [2021-11-06 13:59:05,929 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_throttle [2021-11-06 13:59:05,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 13:59:05,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 13:59:05,929 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~X~int~TO~int [2021-11-06 13:59:05,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~X~int~TO~int [2021-11-06 13:59:05,930 INFO L130 BoogieDeclarations]: Found specification of procedure serial_cleanup [2021-11-06 13:59:05,930 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_cleanup [2021-11-06 13:59:05,930 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_carrier_raised [2021-11-06 13:59:05,930 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_carrier_raised [2021-11-06 13:59:05,930 INFO L130 BoogieDeclarations]: Found specification of procedure serial_tiocmget [2021-11-06 13:59:05,930 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_tiocmget [2021-11-06 13:59:05,930 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_probe [2021-11-06 13:59:05,931 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_probe [2021-11-06 13:59:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_reset_resume [2021-11-06 13:59:05,931 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_reset_resume [2021-11-06 13:59:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_read_bulk_callback [2021-11-06 13:59:05,931 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_read_bulk_callback [2021-11-06 13:59:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 13:59:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_shutdown [2021-11-06 13:59:05,931 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_shutdown [2021-11-06 13:59:05,932 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~pm_message_t~0~TO~int [2021-11-06 13:59:05,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~pm_message_t~0~TO~int [2021-11-06 13:59:05,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 13:59:05,932 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_resume [2021-11-06 13:59:05,932 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_resume [2021-11-06 13:59:05,932 INFO L130 BoogieDeclarations]: Found specification of procedure single_release [2021-11-06 13:59:05,932 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2021-11-06 13:59:05,933 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2021-11-06 13:59:05,933 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_disconnect [2021-11-06 13:59:05,933 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_disconnect [2021-11-06 13:59:05,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 13:59:05,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 13:59:05,933 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-06 13:59:05,933 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-06 13:59:05,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-06 13:59:05,934 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-06 13:59:05,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-06 13:59:05,934 INFO L130 BoogieDeclarations]: Found specification of procedure serial_tiocmset [2021-11-06 13:59:05,934 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_tiocmset [2021-11-06 13:59:05,934 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_put [2021-11-06 13:59:05,934 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_put [2021-11-06 13:59:05,934 INFO L130 BoogieDeclarations]: Found specification of procedure serial_write [2021-11-06 13:59:05,934 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_write [2021-11-06 13:59:05,935 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_serial [2021-11-06 13:59:05,935 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_serial [2021-11-06 13:59:05,935 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-06 13:59:05,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-06 13:59:05,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 13:59:05,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 13:59:05,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 13:59:27,387 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 13:59:27,388 INFO L299 CfgBuilder]: Removed 1549 assume(true) statements. [2021-11-06 13:59:27,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 01:59:27 BoogieIcfgContainer [2021-11-06 13:59:27,391 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 13:59:27,392 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 13:59:27,392 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 13:59:27,395 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 13:59:27,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 01:59:03" (1/3) ... [2021-11-06 13:59:27,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67849a9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 01:59:27, skipping insertion in model container [2021-11-06 13:59:27,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:59:05" (2/3) ... [2021-11-06 13:59:27,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67849a9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 01:59:27, skipping insertion in model container [2021-11-06 13:59:27,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 01:59:27" (3/3) ... [2021-11-06 13:59:27,397 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i [2021-11-06 13:59:27,400 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 13:59:27,400 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 46 error locations. [2021-11-06 13:59:27,434 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 13:59:27,438 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 [2021-11-06 13:59:27,438 INFO L340 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2021-11-06 13:59:27,465 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) [2021-11-06 13:59:27,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-06 13:59:27,468 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 13:59:27,468 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 13:59:27,468 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)] === [2021-11-06 13:59:27,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 13:59:27,472 INFO L85 PathProgramCache]: Analyzing trace with hash -673943287, now seen corresponding path program 1 times [2021-11-06 13:59:27,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 13:59:27,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560534248] [2021-11-06 13:59:27,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 13:59:27,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 13:59:27,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 13:59:28,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 13:59:28,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 13:59:28,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560534248] [2021-11-06 13:59:28,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560534248] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 13:59:28,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 13:59:28,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 13:59:28,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711226820] [2021-11-06 13:59:28,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 13:59:28,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 13:59:28,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 13:59:28,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:59:28,093 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) [2021-11-06 13:59:30,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 13:59:30,590 INFO L93 Difference]: Finished difference Result 5055 states and 7003 transitions. [2021-11-06 13:59:30,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 13:59:30,591 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 [2021-11-06 13:59:30,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 13:59:30,628 INFO L225 Difference]: With dead ends: 5055 [2021-11-06 13:59:30,628 INFO L226 Difference]: Without dead ends: 3243 [2021-11-06 13:59:30,645 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:59:30,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3243 states. [2021-11-06 13:59:30,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3243 to 3193. [2021-11-06 13:59:30,803 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) [2021-11-06 13:59:30,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3193 states to 3193 states and 4277 transitions. [2021-11-06 13:59:30,824 INFO L78 Accepts]: Start accepts. Automaton has 3193 states and 4277 transitions. Word has length 15 [2021-11-06 13:59:30,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 13:59:30,825 INFO L470 AbstractCegarLoop]: Abstraction has 3193 states and 4277 transitions. [2021-11-06 13:59:30,825 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) [2021-11-06 13:59:30,825 INFO L276 IsEmpty]: Start isEmpty. Operand 3193 states and 4277 transitions. [2021-11-06 13:59:30,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-06 13:59:30,826 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 13:59:30,826 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 13:59:30,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 13:59:30,827 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)] === [2021-11-06 13:59:30,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 13:59:30,829 INFO L85 PathProgramCache]: Analyzing trace with hash 582596825, now seen corresponding path program 1 times [2021-11-06 13:59:30,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 13:59:30,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676833540] [2021-11-06 13:59:30,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 13:59:30,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 13:59:30,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 13:59:31,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 13:59:31,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 13:59:31,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676833540] [2021-11-06 13:59:31,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676833540] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 13:59:31,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 13:59:31,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 13:59:31,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045906533] [2021-11-06 13:59:31,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 13:59:31,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 13:59:31,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 13:59:31,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:59:31,060 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) [2021-11-06 13:59:33,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 13:59:33,247 INFO L93 Difference]: Finished difference Result 3193 states and 4277 transitions. [2021-11-06 13:59:33,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 13:59:33,248 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 [2021-11-06 13:59:33,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 13:59:33,259 INFO L225 Difference]: With dead ends: 3193 [2021-11-06 13:59:33,259 INFO L226 Difference]: Without dead ends: 3191 [2021-11-06 13:59:33,261 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:59:33,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3191 states. [2021-11-06 13:59:33,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3191 to 3191. [2021-11-06 13:59:33,317 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) [2021-11-06 13:59:33,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3191 states to 3191 states and 4275 transitions. [2021-11-06 13:59:33,331 INFO L78 Accepts]: Start accepts. Automaton has 3191 states and 4275 transitions. Word has length 16 [2021-11-06 13:59:33,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 13:59:33,331 INFO L470 AbstractCegarLoop]: Abstraction has 3191 states and 4275 transitions. [2021-11-06 13:59:33,331 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) [2021-11-06 13:59:33,331 INFO L276 IsEmpty]: Start isEmpty. Operand 3191 states and 4275 transitions. [2021-11-06 13:59:33,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-06 13:59:33,332 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 13:59:33,332 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 13:59:33,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 13:59:33,332 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)] === [2021-11-06 13:59:33,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 13:59:33,333 INFO L85 PathProgramCache]: Analyzing trace with hash 880634643, now seen corresponding path program 1 times [2021-11-06 13:59:33,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 13:59:33,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107208752] [2021-11-06 13:59:33,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 13:59:33,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 13:59:33,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 13:59:33,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 13:59:33,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 13:59:33,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107208752] [2021-11-06 13:59:33,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107208752] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 13:59:33,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 13:59:33,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 13:59:33,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725887714] [2021-11-06 13:59:33,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 13:59:33,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 13:59:33,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 13:59:33,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:59:33,513 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) [2021-11-06 13:59:35,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 13:59:35,746 INFO L93 Difference]: Finished difference Result 3191 states and 4275 transitions. [2021-11-06 13:59:35,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 13:59:35,747 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 [2021-11-06 13:59:35,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 13:59:35,761 INFO L225 Difference]: With dead ends: 3191 [2021-11-06 13:59:35,761 INFO L226 Difference]: Without dead ends: 3189 [2021-11-06 13:59:35,764 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:59:35,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3189 states. [2021-11-06 13:59:35,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3189 to 3189. [2021-11-06 13:59:35,840 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) [2021-11-06 13:59:35,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3189 states to 3189 states and 4273 transitions. [2021-11-06 13:59:35,856 INFO L78 Accepts]: Start accepts. Automaton has 3189 states and 4273 transitions. Word has length 17 [2021-11-06 13:59:35,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 13:59:35,856 INFO L470 AbstractCegarLoop]: Abstraction has 3189 states and 4273 transitions. [2021-11-06 13:59:35,856 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) [2021-11-06 13:59:35,856 INFO L276 IsEmpty]: Start isEmpty. Operand 3189 states and 4273 transitions. [2021-11-06 13:59:35,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-06 13:59:35,857 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 13:59:35,857 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 13:59:35,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-06 13:59:35,857 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)] === [2021-11-06 13:59:35,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 13:59:35,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1529872419, now seen corresponding path program 1 times [2021-11-06 13:59:35,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 13:59:35,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368934613] [2021-11-06 13:59:35,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 13:59:35,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 13:59:35,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 13:59:36,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 13:59:36,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 13:59:36,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368934613] [2021-11-06 13:59:36,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368934613] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 13:59:36,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 13:59:36,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 13:59:36,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742695130] [2021-11-06 13:59:36,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 13:59:36,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 13:59:36,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 13:59:36,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:59:36,085 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) [2021-11-06 13:59:38,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 13:59:38,362 INFO L93 Difference]: Finished difference Result 3189 states and 4273 transitions. [2021-11-06 13:59:38,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 13:59:38,362 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 [2021-11-06 13:59:38,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 13:59:38,374 INFO L225 Difference]: With dead ends: 3189 [2021-11-06 13:59:38,375 INFO L226 Difference]: Without dead ends: 3160 [2021-11-06 13:59:38,376 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:59:38,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3160 states. [2021-11-06 13:59:38,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3160 to 3160. [2021-11-06 13:59:38,452 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) [2021-11-06 13:59:38,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3160 states to 3160 states and 4235 transitions. [2021-11-06 13:59:38,466 INFO L78 Accepts]: Start accepts. Automaton has 3160 states and 4235 transitions. Word has length 18 [2021-11-06 13:59:38,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 13:59:38,466 INFO L470 AbstractCegarLoop]: Abstraction has 3160 states and 4235 transitions. [2021-11-06 13:59:38,467 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) [2021-11-06 13:59:38,467 INFO L276 IsEmpty]: Start isEmpty. Operand 3160 states and 4235 transitions. [2021-11-06 13:59:38,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-06 13:59:38,473 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 13:59:38,473 INFO L513 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] [2021-11-06 13:59:38,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-06 13:59:38,473 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)] === [2021-11-06 13:59:38,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 13:59:38,474 INFO L85 PathProgramCache]: Analyzing trace with hash -989379772, now seen corresponding path program 1 times [2021-11-06 13:59:38,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 13:59:38,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600936515] [2021-11-06 13:59:38,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 13:59:38,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 13:59:38,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 13:59:38,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 13:59:38,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 13:59:38,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600936515] [2021-11-06 13:59:38,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600936515] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 13:59:38,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 13:59:38,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 13:59:38,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648243358] [2021-11-06 13:59:38,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 13:59:38,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 13:59:38,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 13:59:38,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 13:59:38,720 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) [2021-11-06 13:59:38,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 13:59:38,828 INFO L93 Difference]: Finished difference Result 6179 states and 8289 transitions. [2021-11-06 13:59:38,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 13:59:38,829 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 [2021-11-06 13:59:38,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 13:59:38,848 INFO L225 Difference]: With dead ends: 6179 [2021-11-06 13:59:38,848 INFO L226 Difference]: Without dead ends: 3160 [2021-11-06 13:59:38,863 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 13:59:38,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3160 states. [2021-11-06 13:59:38,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3160 to 3160. [2021-11-06 13:59:38,938 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) [2021-11-06 13:59:38,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3160 states to 3160 states and 4234 transitions. [2021-11-06 13:59:38,951 INFO L78 Accepts]: Start accepts. Automaton has 3160 states and 4234 transitions. Word has length 30 [2021-11-06 13:59:38,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 13:59:38,951 INFO L470 AbstractCegarLoop]: Abstraction has 3160 states and 4234 transitions. [2021-11-06 13:59:38,951 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) [2021-11-06 13:59:38,951 INFO L276 IsEmpty]: Start isEmpty. Operand 3160 states and 4234 transitions. [2021-11-06 13:59:38,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-06 13:59:38,954 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 13:59:38,954 INFO L513 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] [2021-11-06 13:59:38,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-06 13:59:38,954 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)] === [2021-11-06 13:59:38,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 13:59:38,955 INFO L85 PathProgramCache]: Analyzing trace with hash -51816062, now seen corresponding path program 1 times [2021-11-06 13:59:38,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 13:59:38,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796102053] [2021-11-06 13:59:38,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 13:59:38,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 13:59:39,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 13:59:39,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 13:59:39,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 13:59:39,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796102053] [2021-11-06 13:59:39,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796102053] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 13:59:39,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 13:59:39,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 13:59:39,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194556607] [2021-11-06 13:59:39,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 13:59:39,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 13:59:39,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 13:59:39,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:59:39,276 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) [2021-11-06 13:59:39,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 13:59:39,356 INFO L93 Difference]: Finished difference Result 6306 states and 8452 transitions. [2021-11-06 13:59:39,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 13:59:39,357 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 [2021-11-06 13:59:39,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 13:59:39,370 INFO L225 Difference]: With dead ends: 6306 [2021-11-06 13:59:39,371 INFO L226 Difference]: Without dead ends: 3162 [2021-11-06 13:59:39,384 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:59:39,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3162 states. [2021-11-06 13:59:39,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3162 to 3161. [2021-11-06 13:59:39,449 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) [2021-11-06 13:59:39,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3161 states to 3161 states and 4235 transitions. [2021-11-06 13:59:39,459 INFO L78 Accepts]: Start accepts. Automaton has 3161 states and 4235 transitions. Word has length 35 [2021-11-06 13:59:39,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 13:59:39,460 INFO L470 AbstractCegarLoop]: Abstraction has 3161 states and 4235 transitions. [2021-11-06 13:59:39,460 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) [2021-11-06 13:59:39,460 INFO L276 IsEmpty]: Start isEmpty. Operand 3161 states and 4235 transitions. [2021-11-06 13:59:39,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-06 13:59:39,463 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 13:59:39,463 INFO L513 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] [2021-11-06 13:59:39,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-06 13:59:39,463 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)] === [2021-11-06 13:59:39,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 13:59:39,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1856353438, now seen corresponding path program 1 times [2021-11-06 13:59:39,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 13:59:39,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059535962] [2021-11-06 13:59:39,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 13:59:39,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 13:59:39,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 13:59:39,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 13:59:39,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 13:59:39,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059535962] [2021-11-06 13:59:39,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059535962] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 13:59:39,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925511397] [2021-11-06 13:59:39,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 13:59:39,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 13:59:39,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 13:59:39,684 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) [2021-11-06 13:59:39,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-06 13:59:41,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 13:59:41,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 3587 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 13:59:41,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 13:59:41,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-06 13:59:41,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925511397] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 13:59:41,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 13:59:41,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-06 13:59:41,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884431967] [2021-11-06 13:59:41,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 13:59:41,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 13:59:41,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 13:59:41,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-06 13:59:41,295 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) [2021-11-06 13:59:43,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 13:59:43,629 INFO L93 Difference]: Finished difference Result 6178 states and 8312 transitions. [2021-11-06 13:59:43,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 13:59:43,630 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 [2021-11-06 13:59:43,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 13:59:43,643 INFO L225 Difference]: With dead ends: 6178 [2021-11-06 13:59:43,644 INFO L226 Difference]: Without dead ends: 3161 [2021-11-06 13:59:43,660 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-06 13:59:43,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3161 states. [2021-11-06 13:59:43,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3161 to 3141. [2021-11-06 13:59:43,760 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) [2021-11-06 13:59:43,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3141 states to 3141 states and 4137 transitions. [2021-11-06 13:59:43,770 INFO L78 Accepts]: Start accepts. Automaton has 3141 states and 4137 transitions. Word has length 37 [2021-11-06 13:59:43,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 13:59:43,771 INFO L470 AbstractCegarLoop]: Abstraction has 3141 states and 4137 transitions. [2021-11-06 13:59:43,772 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) [2021-11-06 13:59:43,772 INFO L276 IsEmpty]: Start isEmpty. Operand 3141 states and 4137 transitions. [2021-11-06 13:59:43,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-06 13:59:43,773 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 13:59:43,773 INFO L513 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] [2021-11-06 13:59:43,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-06 13:59:43,990 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 [2021-11-06 13:59:43,990 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)] === [2021-11-06 13:59:43,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 13:59:43,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1469233975, now seen corresponding path program 1 times [2021-11-06 13:59:43,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 13:59:43,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936353624] [2021-11-06 13:59:43,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 13:59:43,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 13:59:44,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 13:59:44,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 13:59:44,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 13:59:44,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936353624] [2021-11-06 13:59:44,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936353624] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 13:59:44,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436241724] [2021-11-06 13:59:44,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 13:59:44,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 13:59:44,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 13:59:44,280 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) [2021-11-06 13:59:44,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-06 13:59:45,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 13:59:45,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 3649 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 13:59:45,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 13:59:45,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 13:59:45,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436241724] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 13:59:45,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 13:59:45,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-06 13:59:45,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045327565] [2021-11-06 13:59:45,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 13:59:45,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 13:59:45,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 13:59:45,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-06 13:59:45,927 INFO L87 Difference]: Start difference. First operand 3141 states and 4137 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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) [2021-11-06 13:59:46,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 13:59:46,011 INFO L93 Difference]: Finished difference Result 6268 states and 8258 transitions. [2021-11-06 13:59:46,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 13:59:46,012 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 [2021-11-06 13:59:46,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 13:59:46,025 INFO L225 Difference]: With dead ends: 6268 [2021-11-06 13:59:46,025 INFO L226 Difference]: Without dead ends: 3144 [2021-11-06 13:59:46,039 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-06 13:59:46,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3144 states. [2021-11-06 13:59:46,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3144 to 3143. [2021-11-06 13:59:46,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3143 states, 2879 states have (on average 1.3185133726988538) internal successors, (3796), 2930 states have internal predecessors, (3796), 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) [2021-11-06 13:59:46,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3143 states to 3143 states and 4139 transitions. [2021-11-06 13:59:46,116 INFO L78 Accepts]: Start accepts. Automaton has 3143 states and 4139 transitions. Word has length 41 [2021-11-06 13:59:46,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 13:59:46,117 INFO L470 AbstractCegarLoop]: Abstraction has 3143 states and 4139 transitions. [2021-11-06 13:59:46,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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) [2021-11-06 13:59:46,117 INFO L276 IsEmpty]: Start isEmpty. Operand 3143 states and 4139 transitions. [2021-11-06 13:59:46,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-06 13:59:46,118 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 13:59:46,118 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 13:59:46,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-06 13:59:46,331 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 [2021-11-06 13:59:46,331 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)] === [2021-11-06 13:59:46,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 13:59:46,332 INFO L85 PathProgramCache]: Analyzing trace with hash 747458899, now seen corresponding path program 2 times [2021-11-06 13:59:46,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 13:59:46,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277962766] [2021-11-06 13:59:46,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 13:59:46,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 13:59:46,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 13:59:46,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 13:59:46,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 13:59:46,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277962766] [2021-11-06 13:59:46,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277962766] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 13:59:46,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164903133] [2021-11-06 13:59:46,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 13:59:46,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 13:59:46,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 13:59:46,862 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) [2021-11-06 13:59:46,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-06 13:59:48,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-06 13:59:48,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 13:59:48,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 3550 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-06 13:59:48,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 13:59:48,546 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-06 13:59:48,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164903133] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 13:59:48,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 13:59:48,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-06 13:59:48,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789620272] [2021-11-06 13:59:48,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 13:59:48,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 13:59:48,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 13:59:48,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-06 13:59:48,548 INFO L87 Difference]: Start difference. First operand 3143 states and 4139 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) [2021-11-06 13:59:50,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 13:59:50,712 INFO L93 Difference]: Finished difference Result 6142 states and 8095 transitions. [2021-11-06 13:59:50,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 13:59:50,713 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 43 [2021-11-06 13:59:50,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 13:59:50,727 INFO L225 Difference]: With dead ends: 6142 [2021-11-06 13:59:50,727 INFO L226 Difference]: Without dead ends: 3137 [2021-11-06 13:59:50,738 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-06 13:59:50,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3137 states. [2021-11-06 13:59:50,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3137 to 3137. [2021-11-06 13:59:50,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3137 states, 2873 states have (on average 1.317786286112078) internal successors, (3786), 2924 states have internal predecessors, (3786), 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) [2021-11-06 13:59:50,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3137 states to 3137 states and 4129 transitions. [2021-11-06 13:59:50,814 INFO L78 Accepts]: Start accepts. Automaton has 3137 states and 4129 transitions. Word has length 43 [2021-11-06 13:59:50,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 13:59:50,814 INFO L470 AbstractCegarLoop]: Abstraction has 3137 states and 4129 transitions. [2021-11-06 13:59:50,814 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) [2021-11-06 13:59:50,815 INFO L276 IsEmpty]: Start isEmpty. Operand 3137 states and 4129 transitions. [2021-11-06 13:59:50,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-06 13:59:50,816 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 13:59:50,817 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 13:59:50,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-06 13:59:51,031 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 [2021-11-06 13:59:51,031 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)] === [2021-11-06 13:59:51,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 13:59:51,032 INFO L85 PathProgramCache]: Analyzing trace with hash -352631159, now seen corresponding path program 1 times [2021-11-06 13:59:51,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 13:59:51,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317519009] [2021-11-06 13:59:51,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 13:59:51,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 13:59:51,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 13:59:51,433 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 13:59:51,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 13:59:51,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317519009] [2021-11-06 13:59:51,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317519009] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 13:59:51,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433277861] [2021-11-06 13:59:51,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 13:59:51,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 13:59:51,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 13:59:51,435 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) [2021-11-06 13:59:51,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-06 13:59:52,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 13:59:52,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 3892 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-06 13:59:52,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 13:59:53,072 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 13:59:53,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433277861] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 13:59:53,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 13:59:53,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-06 13:59:53,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605750893] [2021-11-06 13:59:53,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 13:59:53,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 13:59:53,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 13:59:53,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-06 13:59:53,074 INFO L87 Difference]: Start difference. First operand 3137 states and 4129 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 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) [2021-11-06 13:59:53,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 13:59:53,159 INFO L93 Difference]: Finished difference Result 6258 states and 8240 transitions. [2021-11-06 13:59:53,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 13:59:53,159 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 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 55 [2021-11-06 13:59:53,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 13:59:53,168 INFO L225 Difference]: With dead ends: 6258 [2021-11-06 13:59:53,169 INFO L226 Difference]: Without dead ends: 3140 [2021-11-06 13:59:53,227 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-06 13:59:53,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3140 states. [2021-11-06 13:59:53,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3140 to 3139. [2021-11-06 13:59:53,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3139 states, 2875 states have (on average 1.3175652173913044) internal successors, (3788), 2926 states have internal predecessors, (3788), 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) [2021-11-06 13:59:53,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3139 states to 3139 states and 4131 transitions. [2021-11-06 13:59:53,299 INFO L78 Accepts]: Start accepts. Automaton has 3139 states and 4131 transitions. Word has length 55 [2021-11-06 13:59:53,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 13:59:53,301 INFO L470 AbstractCegarLoop]: Abstraction has 3139 states and 4131 transitions. [2021-11-06 13:59:53,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 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) [2021-11-06 13:59:53,301 INFO L276 IsEmpty]: Start isEmpty. Operand 3139 states and 4131 transitions. [2021-11-06 13:59:53,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-06 13:59:53,302 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 13:59:53,302 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-06 13:59:53,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-06 13:59:53,521 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 [2021-11-06 13:59:53,521 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)] === [2021-11-06 13:59:53,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 13:59:53,522 INFO L85 PathProgramCache]: Analyzing trace with hash -424215643, now seen corresponding path program 2 times [2021-11-06 13:59:53,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 13:59:53,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355271352] [2021-11-06 13:59:53,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 13:59:53,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 13:59:53,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 13:59:53,881 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 13:59:53,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 13:59:53,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355271352] [2021-11-06 13:59:53,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355271352] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 13:59:53,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215469336] [2021-11-06 13:59:53,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 13:59:53,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 13:59:53,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 13:59:53,883 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) [2021-11-06 13:59:53,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-06 13:59:55,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-06 13:59:55,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 13:59:55,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 3787 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-06 13:59:55,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 13:59:55,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-06 13:59:55,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215469336] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 13:59:55,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 13:59:55,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-11-06 13:59:55,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182424675] [2021-11-06 13:59:55,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 13:59:55,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 13:59:55,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 13:59:55,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-06 13:59:55,523 INFO L87 Difference]: Start difference. First operand 3139 states and 4131 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) [2021-11-06 13:59:57,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 13:59:57,646 INFO L93 Difference]: Finished difference Result 6141 states and 8090 transitions. [2021-11-06 13:59:57,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 13:59:57,646 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 57 [2021-11-06 13:59:57,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 13:59:57,655 INFO L225 Difference]: With dead ends: 6141 [2021-11-06 13:59:57,655 INFO L226 Difference]: Without dead ends: 3139 [2021-11-06 13:59:57,662 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-06 13:59:57,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3139 states. [2021-11-06 13:59:57,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3139 to 3139. [2021-11-06 13:59:57,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3139 states, 2875 states have (on average 1.317217391304348) internal successors, (3787), 2926 states have internal predecessors, (3787), 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) [2021-11-06 13:59:57,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3139 states to 3139 states and 4130 transitions. [2021-11-06 13:59:57,723 INFO L78 Accepts]: Start accepts. Automaton has 3139 states and 4130 transitions. Word has length 57 [2021-11-06 13:59:57,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 13:59:57,723 INFO L470 AbstractCegarLoop]: Abstraction has 3139 states and 4130 transitions. [2021-11-06 13:59:57,723 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) [2021-11-06 13:59:57,723 INFO L276 IsEmpty]: Start isEmpty. Operand 3139 states and 4130 transitions. [2021-11-06 13:59:57,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-06 13:59:57,724 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 13:59:57,724 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 13:59:57,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-06 13:59:57,939 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 [2021-11-06 13:59:57,940 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)] === [2021-11-06 13:59:57,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 13:59:57,940 INFO L85 PathProgramCache]: Analyzing trace with hash -328698632, now seen corresponding path program 1 times [2021-11-06 13:59:57,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 13:59:57,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523531760] [2021-11-06 13:59:57,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 13:59:57,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 13:59:58,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 13:59:58,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-06 13:59:58,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 13:59:58,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523531760] [2021-11-06 13:59:58,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523531760] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 13:59:58,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 13:59:58,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 13:59:58,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319660014] [2021-11-06 13:59:58,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 13:59:58,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 13:59:58,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 13:59:58,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:59:58,162 INFO L87 Difference]: Start difference. First operand 3139 states and 4130 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) [2021-11-06 14:00:00,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:00:00,478 INFO L93 Difference]: Finished difference Result 3139 states and 4130 transitions. [2021-11-06 14:00:00,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:00:00,478 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 57 [2021-11-06 14:00:00,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:00:00,487 INFO L225 Difference]: With dead ends: 3139 [2021-11-06 14:00:00,487 INFO L226 Difference]: Without dead ends: 3094 [2021-11-06 14:00:00,488 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:00:00,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3094 states. [2021-11-06 14:00:00,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3094 to 3094. [2021-11-06 14:00:00,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3094 states, 2842 states have (on average 1.3114004222378606) internal successors, (3727), 2881 states have internal predecessors, (3727), 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) [2021-11-06 14:00:00,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3094 states to 3094 states and 4070 transitions. [2021-11-06 14:00:00,557 INFO L78 Accepts]: Start accepts. Automaton has 3094 states and 4070 transitions. Word has length 57 [2021-11-06 14:00:00,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:00:00,558 INFO L470 AbstractCegarLoop]: Abstraction has 3094 states and 4070 transitions. [2021-11-06 14:00:00,558 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) [2021-11-06 14:00:00,558 INFO L276 IsEmpty]: Start isEmpty. Operand 3094 states and 4070 transitions. [2021-11-06 14:00:00,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-06 14:00:00,559 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:00:00,559 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-06 14:00:00,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-06 14:00:00,559 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)] === [2021-11-06 14:00:00,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:00:00,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1450656532, now seen corresponding path program 1 times [2021-11-06 14:00:00,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:00:00,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000019373] [2021-11-06 14:00:00,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:00:00,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:00:00,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:00:00,943 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:00:00,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:00:00,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000019373] [2021-11-06 14:00:00,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000019373] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:00:00,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039870873] [2021-11-06 14:00:00,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:00:00,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:00:00,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:00:00,945 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) [2021-11-06 14:00:00,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-06 14:00:02,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:00:02,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 3949 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-06 14:00:02,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:00:02,622 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:00:02,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039870873] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:00:02,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:00:02,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-06 14:00:02,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508921177] [2021-11-06 14:00:02,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 14:00:02,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:00:02,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 14:00:02,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:00:02,624 INFO L87 Difference]: Start difference. First operand 3094 states and 4070 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 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) [2021-11-06 14:00:02,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:00:02,708 INFO L93 Difference]: Finished difference Result 6170 states and 8120 transitions. [2021-11-06 14:00:02,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 14:00:02,709 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 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 62 [2021-11-06 14:00:02,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:00:02,718 INFO L225 Difference]: With dead ends: 6170 [2021-11-06 14:00:02,718 INFO L226 Difference]: Without dead ends: 3097 [2021-11-06 14:00:02,726 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:00:02,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3097 states. [2021-11-06 14:00:02,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3097 to 3096. [2021-11-06 14:00:02,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3096 states, 2844 states have (on average 1.3111814345991561) internal successors, (3729), 2883 states have internal predecessors, (3729), 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) [2021-11-06 14:00:02,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3096 states to 3096 states and 4072 transitions. [2021-11-06 14:00:02,790 INFO L78 Accepts]: Start accepts. Automaton has 3096 states and 4072 transitions. Word has length 62 [2021-11-06 14:00:02,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:00:02,791 INFO L470 AbstractCegarLoop]: Abstraction has 3096 states and 4072 transitions. [2021-11-06 14:00:02,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 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) [2021-11-06 14:00:02,791 INFO L276 IsEmpty]: Start isEmpty. Operand 3096 states and 4072 transitions. [2021-11-06 14:00:02,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-06 14:00:02,792 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:00:02,792 INFO L513 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, 1, 1, 1, 1, 1] [2021-11-06 14:00:02,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-06 14:00:03,005 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 [2021-11-06 14:00:03,006 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)] === [2021-11-06 14:00:03,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:00:03,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1496821680, now seen corresponding path program 2 times [2021-11-06 14:00:03,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:00:03,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695127558] [2021-11-06 14:00:03,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:00:03,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:00:03,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:00:03,347 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:00:03,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:00:03,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695127558] [2021-11-06 14:00:03,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695127558] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:00:03,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328518790] [2021-11-06 14:00:03,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:00:03,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:00:03,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:00:03,352 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) [2021-11-06 14:00:03,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-06 14:00:04,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-06 14:00:04,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:00:04,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 3838 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-06 14:00:04,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:00:05,138 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-06 14:00:05,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328518790] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:00:05,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:00:05,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-06 14:00:05,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665332063] [2021-11-06 14:00:05,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 14:00:05,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:00:05,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 14:00:05,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-06 14:00:05,140 INFO L87 Difference]: Start difference. First operand 3096 states and 4072 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) [2021-11-06 14:00:07,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:00:07,330 INFO L93 Difference]: Finished difference Result 6057 states and 7975 transitions. [2021-11-06 14:00:07,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 14:00:07,331 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 64 [2021-11-06 14:00:07,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:00:07,341 INFO L225 Difference]: With dead ends: 6057 [2021-11-06 14:00:07,341 INFO L226 Difference]: Without dead ends: 3096 [2021-11-06 14:00:07,349 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-11-06 14:00:07,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3096 states. [2021-11-06 14:00:07,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3096 to 3096. [2021-11-06 14:00:07,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3096 states, 2844 states have (on average 1.310829817158931) internal successors, (3728), 2883 states have internal predecessors, (3728), 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) [2021-11-06 14:00:07,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3096 states to 3096 states and 4071 transitions. [2021-11-06 14:00:07,436 INFO L78 Accepts]: Start accepts. Automaton has 3096 states and 4071 transitions. Word has length 64 [2021-11-06 14:00:07,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:00:07,436 INFO L470 AbstractCegarLoop]: Abstraction has 3096 states and 4071 transitions. [2021-11-06 14:00:07,436 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) [2021-11-06 14:00:07,436 INFO L276 IsEmpty]: Start isEmpty. Operand 3096 states and 4071 transitions. [2021-11-06 14:00:07,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-06 14:00:07,438 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:00:07,438 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:00:07,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-06 14:00:07,647 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 [2021-11-06 14:00:07,648 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)] === [2021-11-06 14:00:07,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:00:07,648 INFO L85 PathProgramCache]: Analyzing trace with hash 516535348, now seen corresponding path program 1 times [2021-11-06 14:00:07,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:00:07,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37976690] [2021-11-06 14:00:07,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:00:07,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:00:07,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:00:07,951 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:00:07,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:00:07,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37976690] [2021-11-06 14:00:07,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37976690] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:00:07,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618427270] [2021-11-06 14:00:07,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:00:07,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:00:07,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:00:07,953 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) [2021-11-06 14:00:07,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-06 14:00:09,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:00:09,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 3983 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-06 14:00:09,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:00:09,657 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:00:09,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618427270] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:00:09,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:00:09,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-06 14:00:09,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377353606] [2021-11-06 14:00:09,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-06 14:00:09,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:00:09,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-06 14:00:09,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-06 14:00:09,659 INFO L87 Difference]: Start difference. First operand 3096 states and 4071 transitions. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 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) [2021-11-06 14:00:09,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:00:09,744 INFO L93 Difference]: Finished difference Result 6172 states and 8120 transitions. [2021-11-06 14:00:09,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 14:00:09,745 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 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 67 [2021-11-06 14:00:09,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:00:09,770 INFO L225 Difference]: With dead ends: 6172 [2021-11-06 14:00:09,770 INFO L226 Difference]: Without dead ends: 3099 [2021-11-06 14:00:09,782 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-06 14:00:09,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3099 states. [2021-11-06 14:00:09,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3099 to 3098. [2021-11-06 14:00:09,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3098 states, 2846 states have (on average 1.3106113843991567) internal successors, (3730), 2885 states have internal predecessors, (3730), 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) [2021-11-06 14:00:09,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3098 states to 3098 states and 4073 transitions. [2021-11-06 14:00:09,948 INFO L78 Accepts]: Start accepts. Automaton has 3098 states and 4073 transitions. Word has length 67 [2021-11-06 14:00:09,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:00:09,949 INFO L470 AbstractCegarLoop]: Abstraction has 3098 states and 4073 transitions. [2021-11-06 14:00:09,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 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) [2021-11-06 14:00:09,949 INFO L276 IsEmpty]: Start isEmpty. Operand 3098 states and 4073 transitions. [2021-11-06 14:00:09,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-06 14:00:09,953 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:00:09,953 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-11-06 14:00:09,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-06 14:00:10,167 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 [2021-11-06 14:00:10,167 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)] === [2021-11-06 14:00:10,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:00:10,168 INFO L85 PathProgramCache]: Analyzing trace with hash 334667600, now seen corresponding path program 2 times [2021-11-06 14:00:10,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:00:10,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381283067] [2021-11-06 14:00:10,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:00:10,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:00:10,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:00:10,473 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:00:10,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:00:10,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381283067] [2021-11-06 14:00:10,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381283067] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:00:10,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846751334] [2021-11-06 14:00:10,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:00:10,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:00:10,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:00:10,475 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) [2021-11-06 14:00:10,477 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