./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 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU --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-9ad7fb2 [2021-11-02 23:00:52,044 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 23:00:52,047 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 23:00:52,098 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 23:00:52,099 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 23:00:52,104 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 23:00:52,107 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 23:00:52,116 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 23:00:52,121 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 23:00:52,124 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 23:00:52,126 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 23:00:52,131 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 23:00:52,132 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 23:00:52,143 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 23:00:52,146 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 23:00:52,149 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 23:00:52,152 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 23:00:52,159 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 23:00:52,162 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 23:00:52,173 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 23:00:52,180 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 23:00:52,182 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 23:00:52,184 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 23:00:52,185 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 23:00:52,190 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 23:00:52,191 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 23:00:52,191 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 23:00:52,193 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 23:00:52,193 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 23:00:52,195 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 23:00:52,196 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 23:00:52,197 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 23:00:52,198 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 23:00:52,200 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 23:00:52,202 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 23:00:52,202 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 23:00:52,204 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 23:00:52,204 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 23:00:52,205 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 23:00:52,206 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 23:00:52,207 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 23:00:52,209 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-02 23:00:52,244 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 23:00:52,244 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 23:00:52,245 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 23:00:52,245 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 23:00:52,246 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 23:00:52,247 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 23:00:52,247 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 23:00:52,248 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 23:00:52,248 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 23:00:52,248 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 23:00:52,248 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 23:00:52,249 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 23:00:52,249 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 23:00:52,249 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 23:00:52,250 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 23:00:52,250 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 23:00:52,250 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 23:00:52,251 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 23:00:52,251 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 23:00:52,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:00:52,251 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 23:00:52,252 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 23:00:52,252 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 23:00:52,252 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 23:00:52,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 23:00:52,253 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 23:00:52,253 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 23:00:52,253 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 23:00:52,254 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 23:00:52,254 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac653d5d4bd645822c87d49861fb2a5e304e57a9bdc7e425845f1dc10a0731d2 [2021-11-02 23:00:52,579 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 23:00:52,624 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 23:00:52,628 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 23:00:52,630 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 23:00:52,633 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 23:00:52,635 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i [2021-11-02 23:00:52,784 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/data/5e7515560/422c900b176f4f2da14e1e45124aaed8/FLAGdfbc1c7f3 [2021-11-02 23:00:53,969 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 23:00:53,971 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i [2021-11-02 23:00:54,062 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/data/5e7515560/422c900b176f4f2da14e1e45124aaed8/FLAGdfbc1c7f3 [2021-11-02 23:00:54,256 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/data/5e7515560/422c900b176f4f2da14e1e45124aaed8 [2021-11-02 23:00:54,259 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 23:00:54,261 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 23:00:54,266 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 23:00:54,266 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 23:00:54,271 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 23:00:54,272 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:00:54" (1/1) ... [2021-11-02 23:00:54,274 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30dcbc73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:00:54, skipping insertion in model container [2021-11-02 23:00:54,275 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:00:54" (1/1) ... [2021-11-02 23:00:54,285 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 23:00:54,483 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 23:00:57,595 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i[258672,258685] [2021-11-02 23:00:57,766 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:00:57,832 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 23:00:58,472 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i[258672,258685] [2021-11-02 23:00:58,490 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:00:58,710 INFO L208 MainTranslator]: Completed translation [2021-11-02 23:00:58,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:00:58 WrapperNode [2021-11-02 23:00:58,711 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 23:00:58,714 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 23:00:58,715 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 23:00:58,715 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 23:00:58,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:00:58" (1/1) ... [2021-11-02 23:00:58,914 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:00:58" (1/1) ... [2021-11-02 23:00:59,366 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 23:00:59,367 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 23:00:59,368 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 23:00:59,368 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 23:00:59,378 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:00:58" (1/1) ... [2021-11-02 23:00:59,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:00:58" (1/1) ... [2021-11-02 23:00:59,423 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:00:58" (1/1) ... [2021-11-02 23:00:59,424 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:00:58" (1/1) ... [2021-11-02 23:00:59,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:00:58" (1/1) ... [2021-11-02 23:00:59,776 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:00:58" (1/1) ... [2021-11-02 23:00:59,838 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:00:58" (1/1) ... [2021-11-02 23:00:59,900 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 23:00:59,902 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 23:00:59,902 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 23:00:59,904 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 23:00:59,905 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:00:58" (1/1) ... [2021-11-02 23:00:59,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:00:59,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:00:59,948 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 23:01:00,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 23:01:00,142 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_write_start [2021-11-02 23:01:00,143 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_write_start [2021-11-02 23:01:00,143 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2021-11-02 23:01:00,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2021-11-02 23:01:00,143 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2021-11-02 23:01:00,144 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2021-11-02 23:01:00,144 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_dtr_rts [2021-11-02 23:01:00,144 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_dtr_rts [2021-11-02 23:01:00,144 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_remove [2021-11-02 23:01:00,144 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_remove [2021-11-02 23:01:00,145 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_write [2021-11-02 23:01:00,145 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_write [2021-11-02 23:01:00,145 INFO L130 BoogieDeclarations]: Found specification of procedure serial_chars_in_buffer [2021-11-02 23:01:00,145 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_chars_in_buffer [2021-11-02 23:01:00,145 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_activate [2021-11-02 23:01:00,146 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_activate [2021-11-02 23:01:00,146 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_suspend [2021-11-02 23:01:00,146 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_suspend [2021-11-02 23:01:00,146 INFO L130 BoogieDeclarations]: Found specification of procedure serial_ioctl [2021-11-02 23:01:00,146 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_ioctl [2021-11-02 23:01:00,147 INFO L130 BoogieDeclarations]: Found specification of procedure serial_write_room [2021-11-02 23:01:00,147 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_write_room [2021-11-02 23:01:00,147 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~VOID [2021-11-02 23:01:00,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~VOID [2021-11-02 23:01:00,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 23:01:00,148 INFO L130 BoogieDeclarations]: Found specification of procedure serial_unthrottle [2021-11-02 23:01:00,148 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_unthrottle [2021-11-02 23:01:00,148 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_probe [2021-11-02 23:01:00,148 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_probe [2021-11-02 23:01:00,149 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 23:01:00,149 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2021-11-02 23:01:00,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2021-11-02 23:01:00,149 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2021-11-02 23:01:00,149 INFO L130 BoogieDeclarations]: Found specification of procedure serial_get_icount [2021-11-02 23:01:00,150 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_get_icount [2021-11-02 23:01:00,150 INFO L130 BoogieDeclarations]: Found specification of procedure serial_throttle [2021-11-02 23:01:00,150 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_throttle [2021-11-02 23:01:00,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 23:01:00,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-02 23:01:00,151 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~X~int~TO~int [2021-11-02 23:01:00,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~X~int~TO~int [2021-11-02 23:01:00,151 INFO L130 BoogieDeclarations]: Found specification of procedure serial_cleanup [2021-11-02 23:01:00,151 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_cleanup [2021-11-02 23:01:00,151 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_carrier_raised [2021-11-02 23:01:00,152 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_carrier_raised [2021-11-02 23:01:00,152 INFO L130 BoogieDeclarations]: Found specification of procedure serial_tiocmget [2021-11-02 23:01:00,152 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_tiocmget [2021-11-02 23:01:00,152 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_probe [2021-11-02 23:01:00,152 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_probe [2021-11-02 23:01:00,153 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_reset_resume [2021-11-02 23:01:00,153 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_reset_resume [2021-11-02 23:01:00,153 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_read_bulk_callback [2021-11-02 23:01:00,153 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_read_bulk_callback [2021-11-02 23:01:00,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 23:01:00,154 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_shutdown [2021-11-02 23:01:00,154 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_shutdown [2021-11-02 23:01:00,154 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~pm_message_t~0~TO~int [2021-11-02 23:01:00,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~pm_message_t~0~TO~int [2021-11-02 23:01:00,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 23:01:00,155 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_resume [2021-11-02 23:01:00,155 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_resume [2021-11-02 23:01:00,155 INFO L130 BoogieDeclarations]: Found specification of procedure single_release [2021-11-02 23:01:00,156 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2021-11-02 23:01:00,156 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2021-11-02 23:01:00,156 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_disconnect [2021-11-02 23:01:00,156 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_disconnect [2021-11-02 23:01:00,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 23:01:00,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 23:01:00,157 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-02 23:01:00,157 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-02 23:01:00,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-02 23:01:00,157 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-02 23:01:00,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-02 23:01:00,158 INFO L130 BoogieDeclarations]: Found specification of procedure serial_tiocmset [2021-11-02 23:01:00,158 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_tiocmset [2021-11-02 23:01:00,158 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_put [2021-11-02 23:01:00,159 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_put [2021-11-02 23:01:00,159 INFO L130 BoogieDeclarations]: Found specification of procedure serial_write [2021-11-02 23:01:00,159 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_write [2021-11-02 23:01:00,159 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_serial [2021-11-02 23:01:00,159 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_serial [2021-11-02 23:01:00,160 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-02 23:01:00,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-02 23:01:00,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 23:01:00,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 23:01:00,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 23:01:42,471 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 23:01:42,471 INFO L299 CfgBuilder]: Removed 1549 assume(true) statements. [2021-11-02 23:01:42,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:01:42 BoogieIcfgContainer [2021-11-02 23:01:42,479 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 23:01:42,482 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 23:01:42,482 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 23:01:42,487 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 23:01:42,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:00:54" (1/3) ... [2021-11-02 23:01:42,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76e81b2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:01:42, skipping insertion in model container [2021-11-02 23:01:42,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:00:58" (2/3) ... [2021-11-02 23:01:42,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76e81b2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:01:42, skipping insertion in model container [2021-11-02 23:01:42,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:01:42" (3/3) ... [2021-11-02 23:01:42,493 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i [2021-11-02 23:01:42,504 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 23:01:42,505 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 46 error locations. [2021-11-02 23:01:42,593 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 23:01:42,608 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 [2021-11-02 23:01:42,609 INFO L340 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2021-11-02 23:01:42,688 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) [2021-11-02 23:01:42,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-02 23:01:42,695 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:42,695 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:42,696 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)] === [2021-11-02 23:01:42,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:42,702 INFO L85 PathProgramCache]: Analyzing trace with hash -673943287, now seen corresponding path program 1 times [2021-11-02 23:01:42,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:42,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119239968] [2021-11-02 23:01:42,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:42,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:43,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:43,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:43,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:43,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119239968] [2021-11-02 23:01:43,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119239968] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:01:43,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:01:43,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:01:43,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002756365] [2021-11-02 23:01:43,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:01:43,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:44,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:01:44,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:01:44,026 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) [2021-11-02 23:01:46,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:46,892 INFO L93 Difference]: Finished difference Result 5055 states and 7003 transitions. [2021-11-02 23:01:46,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:01:46,905 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 [2021-11-02 23:01:46,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:46,989 INFO L225 Difference]: With dead ends: 5055 [2021-11-02 23:01:46,989 INFO L226 Difference]: Without dead ends: 3243 [2021-11-02 23:01:47,024 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 [2021-11-02 23:01:47,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3243 states. [2021-11-02 23:01:47,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3243 to 3193. [2021-11-02 23:01:47,345 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) [2021-11-02 23:01:47,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3193 states to 3193 states and 4277 transitions. [2021-11-02 23:01:47,400 INFO L78 Accepts]: Start accepts. Automaton has 3193 states and 4277 transitions. Word has length 15 [2021-11-02 23:01:47,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:47,401 INFO L470 AbstractCegarLoop]: Abstraction has 3193 states and 4277 transitions. [2021-11-02 23:01:47,401 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) [2021-11-02 23:01:47,402 INFO L276 IsEmpty]: Start isEmpty. Operand 3193 states and 4277 transitions. [2021-11-02 23:01:47,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 23:01:47,404 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:47,404 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:47,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 23:01:47,406 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)] === [2021-11-02 23:01:47,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:47,410 INFO L85 PathProgramCache]: Analyzing trace with hash 582596825, now seen corresponding path program 1 times [2021-11-02 23:01:47,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:47,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343397397] [2021-11-02 23:01:47,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:47,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:47,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:48,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:48,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:48,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343397397] [2021-11-02 23:01:48,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343397397] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:01:48,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:01:48,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:01:48,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42699468] [2021-11-02 23:01:48,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:01:48,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:48,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:01:48,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:01:48,116 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) [2021-11-02 23:01:50,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:50,474 INFO L93 Difference]: Finished difference Result 3193 states and 4277 transitions. [2021-11-02 23:01:50,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:01:50,475 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 [2021-11-02 23:01:50,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:50,510 INFO L225 Difference]: With dead ends: 3193 [2021-11-02 23:01:50,510 INFO L226 Difference]: Without dead ends: 3191 [2021-11-02 23:01:50,514 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 [2021-11-02 23:01:50,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3191 states. [2021-11-02 23:01:50,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3191 to 3191. [2021-11-02 23:01:50,675 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) [2021-11-02 23:01:50,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3191 states to 3191 states and 4275 transitions. [2021-11-02 23:01:50,718 INFO L78 Accepts]: Start accepts. Automaton has 3191 states and 4275 transitions. Word has length 16 [2021-11-02 23:01:50,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:50,719 INFO L470 AbstractCegarLoop]: Abstraction has 3191 states and 4275 transitions. [2021-11-02 23:01:50,719 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) [2021-11-02 23:01:50,719 INFO L276 IsEmpty]: Start isEmpty. Operand 3191 states and 4275 transitions. [2021-11-02 23:01:50,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 23:01:50,720 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:50,721 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:50,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 23:01:50,721 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)] === [2021-11-02 23:01:50,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:50,722 INFO L85 PathProgramCache]: Analyzing trace with hash 880634643, now seen corresponding path program 1 times [2021-11-02 23:01:50,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:50,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345463698] [2021-11-02 23:01:50,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:50,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:50,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:51,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:51,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:51,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345463698] [2021-11-02 23:01:51,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345463698] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:01:51,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:01:51,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:01:51,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263446103] [2021-11-02 23:01:51,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:01:51,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:51,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:01:51,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:01:51,182 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) [2021-11-02 23:01:53,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:53,628 INFO L93 Difference]: Finished difference Result 3191 states and 4275 transitions. [2021-11-02 23:01:53,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:01:53,629 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 [2021-11-02 23:01:53,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:53,663 INFO L225 Difference]: With dead ends: 3191 [2021-11-02 23:01:53,663 INFO L226 Difference]: Without dead ends: 3189 [2021-11-02 23:01:53,666 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 [2021-11-02 23:01:53,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3189 states. [2021-11-02 23:01:53,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3189 to 3189. [2021-11-02 23:01:53,838 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) [2021-11-02 23:01:53,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3189 states to 3189 states and 4273 transitions. [2021-11-02 23:01:53,875 INFO L78 Accepts]: Start accepts. Automaton has 3189 states and 4273 transitions. Word has length 17 [2021-11-02 23:01:53,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:53,877 INFO L470 AbstractCegarLoop]: Abstraction has 3189 states and 4273 transitions. [2021-11-02 23:01:53,877 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) [2021-11-02 23:01:53,877 INFO L276 IsEmpty]: Start isEmpty. Operand 3189 states and 4273 transitions. [2021-11-02 23:01:53,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-02 23:01:53,879 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:53,879 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:53,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 23:01:53,880 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)] === [2021-11-02 23:01:53,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:53,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1529872419, now seen corresponding path program 1 times [2021-11-02 23:01:53,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:53,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603825685] [2021-11-02 23:01:53,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:53,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:54,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:54,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:54,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:54,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603825685] [2021-11-02 23:01:54,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603825685] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:01:54,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:01:54,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:01:54,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081924336] [2021-11-02 23:01:54,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:01:54,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:54,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:01:54,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:01:54,389 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) [2021-11-02 23:01:56,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:56,865 INFO L93 Difference]: Finished difference Result 3189 states and 4273 transitions. [2021-11-02 23:01:56,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:01:56,866 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 [2021-11-02 23:01:56,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:56,897 INFO L225 Difference]: With dead ends: 3189 [2021-11-02 23:01:56,898 INFO L226 Difference]: Without dead ends: 3160 [2021-11-02 23:01:56,901 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 [2021-11-02 23:01:56,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3160 states. [2021-11-02 23:01:57,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3160 to 3160. [2021-11-02 23:01:57,087 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) [2021-11-02 23:01:57,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3160 states to 3160 states and 4235 transitions. [2021-11-02 23:01:57,110 INFO L78 Accepts]: Start accepts. Automaton has 3160 states and 4235 transitions. Word has length 18 [2021-11-02 23:01:57,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:57,110 INFO L470 AbstractCegarLoop]: Abstraction has 3160 states and 4235 transitions. [2021-11-02 23:01:57,111 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) [2021-11-02 23:01:57,111 INFO L276 IsEmpty]: Start isEmpty. Operand 3160 states and 4235 transitions. [2021-11-02 23:01:57,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-02 23:01:57,122 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:57,122 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] [2021-11-02 23:01:57,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 23:01:57,123 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)] === [2021-11-02 23:01:57,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:57,123 INFO L85 PathProgramCache]: Analyzing trace with hash -989379772, now seen corresponding path program 1 times [2021-11-02 23:01:57,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:57,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431340926] [2021-11-02 23:01:57,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:57,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:57,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:57,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:57,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:57,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431340926] [2021-11-02 23:01:57,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431340926] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:01:57,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:01:57,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:01:57,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743537696] [2021-11-02 23:01:57,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:01:57,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:57,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:01:57,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:01:57,556 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) [2021-11-02 23:01:57,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:57,779 INFO L93 Difference]: Finished difference Result 6179 states and 8289 transitions. [2021-11-02 23:01:57,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:01:57,780 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 [2021-11-02 23:01:57,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:57,913 INFO L225 Difference]: With dead ends: 6179 [2021-11-02 23:01:57,913 INFO L226 Difference]: Without dead ends: 3160 [2021-11-02 23:01:57,937 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 [2021-11-02 23:01:57,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3160 states. [2021-11-02 23:01:58,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3160 to 3160. [2021-11-02 23:01:58,142 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) [2021-11-02 23:01:58,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3160 states to 3160 states and 4234 transitions. [2021-11-02 23:01:58,170 INFO L78 Accepts]: Start accepts. Automaton has 3160 states and 4234 transitions. Word has length 30 [2021-11-02 23:01:58,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:58,171 INFO L470 AbstractCegarLoop]: Abstraction has 3160 states and 4234 transitions. [2021-11-02 23:01:58,171 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) [2021-11-02 23:01:58,171 INFO L276 IsEmpty]: Start isEmpty. Operand 3160 states and 4234 transitions. [2021-11-02 23:01:58,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-02 23:01:58,175 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:58,175 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] [2021-11-02 23:01:58,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 23:01:58,176 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)] === [2021-11-02 23:01:58,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:58,177 INFO L85 PathProgramCache]: Analyzing trace with hash -51816062, now seen corresponding path program 1 times [2021-11-02 23:01:58,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:58,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86761896] [2021-11-02 23:01:58,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:58,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:58,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:58,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:58,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:58,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86761896] [2021-11-02 23:01:58,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86761896] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:01:58,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:01:58,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:01:58,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8967310] [2021-11-02 23:01:58,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:01:58,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:58,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:01:58,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:01:58,639 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) [2021-11-02 23:01:58,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:58,889 INFO L93 Difference]: Finished difference Result 6306 states and 8452 transitions. [2021-11-02 23:01:58,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:01:58,890 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 [2021-11-02 23:01:58,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:58,927 INFO L225 Difference]: With dead ends: 6306 [2021-11-02 23:01:58,927 INFO L226 Difference]: Without dead ends: 3162 [2021-11-02 23:01:58,953 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 [2021-11-02 23:01:58,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3162 states. [2021-11-02 23:01:59,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3162 to 3161. [2021-11-02 23:01:59,156 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) [2021-11-02 23:01:59,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3161 states to 3161 states and 4235 transitions. [2021-11-02 23:01:59,184 INFO L78 Accepts]: Start accepts. Automaton has 3161 states and 4235 transitions. Word has length 35 [2021-11-02 23:01:59,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:59,184 INFO L470 AbstractCegarLoop]: Abstraction has 3161 states and 4235 transitions. [2021-11-02 23:01:59,185 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) [2021-11-02 23:01:59,185 INFO L276 IsEmpty]: Start isEmpty. Operand 3161 states and 4235 transitions. [2021-11-02 23:01:59,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-02 23:01:59,190 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:59,190 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] [2021-11-02 23:01:59,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 23:01:59,191 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)] === [2021-11-02 23:01:59,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:59,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1856353438, now seen corresponding path program 1 times [2021-11-02 23:01:59,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:59,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829709963] [2021-11-02 23:01:59,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:59,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:59,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:59,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:59,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:59,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829709963] [2021-11-02 23:01:59,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829709963] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:59,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148178874] [2021-11-02 23:01:59,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:59,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:59,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:59,651 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:59,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 23:02:02,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:02,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 3587 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 23:02:02,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:02,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:02:02,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148178874] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:02:02,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:02:02,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-02 23:02:02,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531595562] [2021-11-02 23:02:02,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:02:02,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:02,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:02:02,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:02:02,435 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) [2021-11-02 23:02:05,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:05,066 INFO L93 Difference]: Finished difference Result 6178 states and 8312 transitions. [2021-11-02 23:02:05,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:02:05,067 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 [2021-11-02 23:02:05,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:05,097 INFO L225 Difference]: With dead ends: 6178 [2021-11-02 23:02:05,097 INFO L226 Difference]: Without dead ends: 3161 [2021-11-02 23:02:05,127 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 [2021-11-02 23:02:05,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3161 states. [2021-11-02 23:02:05,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3161 to 3141. [2021-11-02 23:02:05,284 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) [2021-11-02 23:02:05,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3141 states to 3141 states and 4137 transitions. [2021-11-02 23:02:05,303 INFO L78 Accepts]: Start accepts. Automaton has 3141 states and 4137 transitions. Word has length 37 [2021-11-02 23:02:05,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:05,304 INFO L470 AbstractCegarLoop]: Abstraction has 3141 states and 4137 transitions. [2021-11-02 23:02:05,304 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) [2021-11-02 23:02:05,305 INFO L276 IsEmpty]: Start isEmpty. Operand 3141 states and 4137 transitions. [2021-11-02 23:02:05,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-02 23:02:05,307 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:05,307 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] [2021-11-02 23:02:05,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 23:02:05,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-02 23:02:05,531 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)] === [2021-11-02 23:02:05,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:05,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1469233975, now seen corresponding path program 1 times [2021-11-02 23:02:05,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:05,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530777228] [2021-11-02 23:02:05,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:05,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:05,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:05,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:02:05,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:05,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530777228] [2021-11-02 23:02:05,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530777228] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:05,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657971125] [2021-11-02 23:02:05,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:05,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:05,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:05,979 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:06,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 23:02:08,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:08,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 3649 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 23:02:09,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:09,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:02:09,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657971125] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:09,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:09,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-02 23:02:09,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230798616] [2021-11-02 23:02:09,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:02:09,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:09,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:02:09,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:02:09,195 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) [2021-11-02 23:02:09,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:09,400 INFO L93 Difference]: Finished difference Result 6268 states and 8258 transitions. [2021-11-02 23:02:09,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:02:09,400 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 [2021-11-02 23:02:09,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:09,446 INFO L225 Difference]: With dead ends: 6268 [2021-11-02 23:02:09,446 INFO L226 Difference]: Without dead ends: 3144 [2021-11-02 23:02:09,467 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 [2021-11-02 23:02:09,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3144 states. [2021-11-02 23:02:09,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3144 to 3143. [2021-11-02 23:02:09,638 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) [2021-11-02 23:02:09,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3143 states to 3143 states and 4139 transitions. [2021-11-02 23:02:09,667 INFO L78 Accepts]: Start accepts. Automaton has 3143 states and 4139 transitions. Word has length 41 [2021-11-02 23:02:09,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:09,668 INFO L470 AbstractCegarLoop]: Abstraction has 3143 states and 4139 transitions. [2021-11-02 23:02:09,669 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) [2021-11-02 23:02:09,670 INFO L276 IsEmpty]: Start isEmpty. Operand 3143 states and 4139 transitions. [2021-11-02 23:02:09,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-02 23:02:09,672 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:09,672 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] [2021-11-02 23:02:09,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 23:02:09,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:09,887 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)] === [2021-11-02 23:02:09,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:09,887 INFO L85 PathProgramCache]: Analyzing trace with hash 747458899, now seen corresponding path program 2 times [2021-11-02 23:02:09,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:09,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970144237] [2021-11-02 23:02:09,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:09,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:10,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:11,238 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:02:11,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:11,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970144237] [2021-11-02 23:02:11,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970144237] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:11,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004009553] [2021-11-02 23:02:11,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:02:11,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:11,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:11,252 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:11,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 23:02:13,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-02 23:02:13,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:13,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 3550 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 23:02:13,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:14,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-02 23:02:14,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004009553] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:02:14,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:02:14,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-02 23:02:14,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86284082] [2021-11-02 23:02:14,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:02:14,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:14,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:02:14,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:02:14,074 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) [2021-11-02 23:02:16,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:16,346 INFO L93 Difference]: Finished difference Result 6142 states and 8095 transitions. [2021-11-02 23:02:16,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:02:16,347 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 [2021-11-02 23:02:16,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:16,373 INFO L225 Difference]: With dead ends: 6142 [2021-11-02 23:02:16,373 INFO L226 Difference]: Without dead ends: 3137 [2021-11-02 23:02:16,390 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 [2021-11-02 23:02:16,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3137 states. [2021-11-02 23:02:16,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3137 to 3137. [2021-11-02 23:02:16,548 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) [2021-11-02 23:02:16,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3137 states to 3137 states and 4129 transitions. [2021-11-02 23:02:16,567 INFO L78 Accepts]: Start accepts. Automaton has 3137 states and 4129 transitions. Word has length 43 [2021-11-02 23:02:16,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:16,567 INFO L470 AbstractCegarLoop]: Abstraction has 3137 states and 4129 transitions. [2021-11-02 23:02:16,567 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) [2021-11-02 23:02:16,568 INFO L276 IsEmpty]: Start isEmpty. Operand 3137 states and 4129 transitions. [2021-11-02 23:02:16,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-02 23:02:16,571 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:16,572 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] [2021-11-02 23:02:16,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 23:02:16,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:16,787 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)] === [2021-11-02 23:02:16,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:16,787 INFO L85 PathProgramCache]: Analyzing trace with hash -352631159, now seen corresponding path program 1 times [2021-11-02 23:02:16,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:16,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906712192] [2021-11-02 23:02:16,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:16,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:17,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:17,725 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:02:17,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:17,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906712192] [2021-11-02 23:02:17,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906712192] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:17,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287045470] [2021-11-02 23:02:17,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:17,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:17,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:17,738 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:17,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 23:02:20,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:20,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 3892 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 23:02:20,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:20,767 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:02:20,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287045470] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:20,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:20,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-02 23:02:20,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612394583] [2021-11-02 23:02:20,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:02:20,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:20,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:02:20,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:02:20,770 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) [2021-11-02 23:02:20,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:20,995 INFO L93 Difference]: Finished difference Result 6258 states and 8240 transitions. [2021-11-02 23:02:20,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:02:20,996 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 [2021-11-02 23:02:20,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:21,022 INFO L225 Difference]: With dead ends: 6258 [2021-11-02 23:02:21,023 INFO L226 Difference]: Without dead ends: 3140 [2021-11-02 23:02:21,037 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 [2021-11-02 23:02:21,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3140 states. [2021-11-02 23:02:21,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3140 to 3139. [2021-11-02 23:02:21,192 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) [2021-11-02 23:02:21,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3139 states to 3139 states and 4131 transitions. [2021-11-02 23:02:21,209 INFO L78 Accepts]: Start accepts. Automaton has 3139 states and 4131 transitions. Word has length 55 [2021-11-02 23:02:21,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:21,209 INFO L470 AbstractCegarLoop]: Abstraction has 3139 states and 4131 transitions. [2021-11-02 23:02:21,210 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) [2021-11-02 23:02:21,210 INFO L276 IsEmpty]: Start isEmpty. Operand 3139 states and 4131 transitions. [2021-11-02 23:02:21,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-02 23:02:21,212 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:21,212 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] [2021-11-02 23:02:21,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 23:02:21,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-02 23:02:21,434 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)] === [2021-11-02 23:02:21,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:21,435 INFO L85 PathProgramCache]: Analyzing trace with hash -424215643, now seen corresponding path program 2 times [2021-11-02 23:02:21,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:21,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891181817] [2021-11-02 23:02:21,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:21,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:22,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:22,358 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:02:22,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:22,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891181817] [2021-11-02 23:02:22,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891181817] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:22,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111753418] [2021-11-02 23:02:22,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:02:22,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:22,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:22,361 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:22,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 23:02:25,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-02 23:02:25,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:25,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 3787 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 23:02:25,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:25,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-02 23:02:25,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111753418] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:02:25,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:02:25,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-11-02 23:02:25,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754730881] [2021-11-02 23:02:25,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:02:25,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:25,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:02:25,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:02:25,496 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) [2021-11-02 23:02:27,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:27,816 INFO L93 Difference]: Finished difference Result 6141 states and 8090 transitions. [2021-11-02 23:02:27,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:02:27,817 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 [2021-11-02 23:02:27,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:27,837 INFO L225 Difference]: With dead ends: 6141 [2021-11-02 23:02:27,838 INFO L226 Difference]: Without dead ends: 3139 [2021-11-02 23:02:27,854 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 [2021-11-02 23:02:27,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3139 states. [2021-11-02 23:02:28,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3139 to 3139. [2021-11-02 23:02:28,013 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) [2021-11-02 23:02:28,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3139 states to 3139 states and 4130 transitions. [2021-11-02 23:02:28,031 INFO L78 Accepts]: Start accepts. Automaton has 3139 states and 4130 transitions. Word has length 57 [2021-11-02 23:02:28,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:28,032 INFO L470 AbstractCegarLoop]: Abstraction has 3139 states and 4130 transitions. [2021-11-02 23:02:28,032 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) [2021-11-02 23:02:28,032 INFO L276 IsEmpty]: Start isEmpty. Operand 3139 states and 4130 transitions. [2021-11-02 23:02:28,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-02 23:02:28,034 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:28,034 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] [2021-11-02 23:02:28,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 23:02:28,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-02 23:02:28,251 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)] === [2021-11-02 23:02:28,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:28,251 INFO L85 PathProgramCache]: Analyzing trace with hash -328698632, now seen corresponding path program 1 times [2021-11-02 23:02:28,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:28,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334695549] [2021-11-02 23:02:28,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:28,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:28,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:28,779 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 23:02:28,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:28,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334695549] [2021-11-02 23:02:28,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334695549] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:02:28,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:02:28,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:02:28,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643072064] [2021-11-02 23:02:28,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:02:28,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:28,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:02:28,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:02:28,783 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) [2021-11-02 23:02:31,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:31,175 INFO L93 Difference]: Finished difference Result 3139 states and 4130 transitions. [2021-11-02 23:02:31,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:02:31,176 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 [2021-11-02 23:02:31,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:31,193 INFO L225 Difference]: With dead ends: 3139 [2021-11-02 23:02:31,194 INFO L226 Difference]: Without dead ends: 3094 [2021-11-02 23:02:31,196 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 [2021-11-02 23:02:31,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3094 states. [2021-11-02 23:02:31,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3094 to 3094. [2021-11-02 23:02:31,340 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) [2021-11-02 23:02:31,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3094 states to 3094 states and 4070 transitions. [2021-11-02 23:02:31,357 INFO L78 Accepts]: Start accepts. Automaton has 3094 states and 4070 transitions. Word has length 57 [2021-11-02 23:02:31,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:31,357 INFO L470 AbstractCegarLoop]: Abstraction has 3094 states and 4070 transitions. [2021-11-02 23:02:31,360 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) [2021-11-02 23:02:31,360 INFO L276 IsEmpty]: Start isEmpty. Operand 3094 states and 4070 transitions. [2021-11-02 23:02:31,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-02 23:02:31,362 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:31,363 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] [2021-11-02 23:02:31,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 23:02:31,363 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)] === [2021-11-02 23:02:31,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:31,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1450656532, now seen corresponding path program 1 times [2021-11-02 23:02:31,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:31,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107650080] [2021-11-02 23:02:31,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:31,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:31,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:32,118 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:02:32,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:32,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107650080] [2021-11-02 23:02:32,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107650080] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:32,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887489652] [2021-11-02 23:02:32,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:32,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:32,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:32,123 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:32,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 23:02:34,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:34,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 3949 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 23:02:34,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:34,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:02:34,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887489652] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:34,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:34,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-02 23:02:34,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513018271] [2021-11-02 23:02:34,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:02:34,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:34,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:02:34,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:02:34,976 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) [2021-11-02 23:02:35,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:35,163 INFO L93 Difference]: Finished difference Result 6170 states and 8120 transitions. [2021-11-02 23:02:35,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:02:35,164 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 [2021-11-02 23:02:35,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:35,182 INFO L225 Difference]: With dead ends: 6170 [2021-11-02 23:02:35,182 INFO L226 Difference]: Without dead ends: 3097 [2021-11-02 23:02:35,196 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 [2021-11-02 23:02:35,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3097 states. [2021-11-02 23:02:35,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3097 to 3096. [2021-11-02 23:02:35,345 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) [2021-11-02 23:02:35,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3096 states to 3096 states and 4072 transitions. [2021-11-02 23:02:35,364 INFO L78 Accepts]: Start accepts. Automaton has 3096 states and 4072 transitions. Word has length 62 [2021-11-02 23:02:35,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:35,366 INFO L470 AbstractCegarLoop]: Abstraction has 3096 states and 4072 transitions. [2021-11-02 23:02:35,366 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) [2021-11-02 23:02:35,367 INFO L276 IsEmpty]: Start isEmpty. Operand 3096 states and 4072 transitions. [2021-11-02 23:02:35,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-02 23:02:35,369 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:35,369 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] [2021-11-02 23:02:35,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 23:02:35,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:35,582 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)] === [2021-11-02 23:02:35,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:35,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1496821680, now seen corresponding path program 2 times [2021-11-02 23:02:35,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:35,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901912961] [2021-11-02 23:02:35,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:35,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:36,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:36,309 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:02:36,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:36,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901912961] [2021-11-02 23:02:36,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901912961] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:36,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775176489] [2021-11-02 23:02:36,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:02:36,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:36,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:36,312 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:36,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 23:02:39,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-02 23:02:39,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:02:39,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 3838 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-02 23:02:39,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:39,520 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-02 23:02:39,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775176489] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:02:39,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:02:39,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-02 23:02:39,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325841912] [2021-11-02 23:02:39,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:02:39,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:39,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:02:39,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:02:39,523 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) [2021-11-02 23:02:41,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:41,944 INFO L93 Difference]: Finished difference Result 6057 states and 7975 transitions. [2021-11-02 23:02:41,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:02:41,945 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 [2021-11-02 23:02:41,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:41,962 INFO L225 Difference]: With dead ends: 6057 [2021-11-02 23:02:41,962 INFO L226 Difference]: Without dead ends: 3096 [2021-11-02 23:02:41,975 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:02:41,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3096 states. [2021-11-02 23:02:42,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3096 to 3096. [2021-11-02 23:02:42,103 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) [2021-11-02 23:02:42,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3096 states to 3096 states and 4071 transitions. [2021-11-02 23:02:42,119 INFO L78 Accepts]: Start accepts. Automaton has 3096 states and 4071 transitions. Word has length 64 [2021-11-02 23:02:42,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:42,120 INFO L470 AbstractCegarLoop]: Abstraction has 3096 states and 4071 transitions. [2021-11-02 23:02:42,120 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) [2021-11-02 23:02:42,120 INFO L276 IsEmpty]: Start isEmpty. Operand 3096 states and 4071 transitions. [2021-11-02 23:02:42,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-02 23:02:42,122 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:42,122 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] [2021-11-02 23:02:42,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 23:02:42,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:42,346 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)] === [2021-11-02 23:02:42,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:42,347 INFO L85 PathProgramCache]: Analyzing trace with hash 516535348, now seen corresponding path program 1 times [2021-11-02 23:02:42,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:42,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231695501] [2021-11-02 23:02:42,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:42,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:42,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:43,034 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:02:43,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:43,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231695501] [2021-11-02 23:02:43,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231695501] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:43,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401893260] [2021-11-02 23:02:43,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:43,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:43,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:43,039 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:43,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 23:02:45,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:45,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 3983 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 23:02:45,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:46,114 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:02:46,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401893260] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:46,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:46,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-02 23:02:46,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787806400] [2021-11-02 23:02:46,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:02:46,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:02:46,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:02:46,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:02:46,117 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) [2021-11-02 23:02:46,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:46,293 INFO L93 Difference]: Finished difference Result 6172 states and 8120 transitions. [2021-11-02 23:02:46,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:02:46,293 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 [2021-11-02 23:02:46,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:46,309 INFO L225 Difference]: With dead ends: 6172 [2021-11-02 23:02:46,310 INFO L226 Difference]: Without dead ends: 3099 [2021-11-02 23:02:46,323 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 [2021-11-02 23:02:46,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3099 states. [2021-11-02 23:02:46,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3099 to 3098. [2021-11-02 23:02:46,450 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) [2021-11-02 23:02:46,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3098 states to 3098 states and 4073 transitions. [2021-11-02 23:02:46,466 INFO L78 Accepts]: Start accepts. Automaton has 3098 states and 4073 transitions. Word has length 67 [2021-11-02 23:02:46,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:46,467 INFO L470 AbstractCegarLoop]: Abstraction has 3098 states and 4073 transitions. [2021-11-02 23:02:46,467 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) [2021-11-02 23:02:46,467 INFO L276 IsEmpty]: Start isEmpty. Operand 3098 states and 4073 transitions. [2021-11-02 23:02:46,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-02 23:02:46,469 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:46,470 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] [2021-11-02 23:02:46,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-02 23:02:46,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-02 23:02:46,691 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)] === [2021-11-02 23:02:46,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:46,691 INFO L85 PathProgramCache]: Analyzing trace with hash 334667600, now seen corresponding path program 2 times [2021-11-02 23:02:46,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:02:46,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115480608] [2021-11-02 23:02:46,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:46,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:02:47,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:47,549 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:02:47,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:02:47,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115480608] [2021-11-02 23:02:47,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115480608] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:02:47,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26694382] [2021-11-02 23:02:47,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:02:47,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:02:47,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:47,552 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:02:47,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ddb7e2-e6f7-42a2-8b1a-e9f7b4e1bb8b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process