./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 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/config/TaipanReach.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_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8 --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash ac653d5d4bd645822c87d49861fb2a5e304e57a9bdc7e425845f1dc10a0731d2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:35:00,646 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:35:00,649 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:35:00,700 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:35:00,701 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:35:00,702 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:35:00,704 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:35:00,707 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:35:00,709 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:35:00,710 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:35:00,712 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:35:00,713 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:35:00,714 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:35:00,715 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:35:00,717 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:35:00,718 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:35:00,721 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:35:00,722 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:35:00,724 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:35:00,726 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:35:00,728 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:35:00,730 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:35:00,731 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:35:00,732 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:35:00,736 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:35:00,736 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:35:00,737 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:35:00,738 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:35:00,738 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:35:00,740 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:35:00,740 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:35:00,741 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:35:00,742 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:35:00,743 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:35:00,744 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:35:00,745 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:35:00,745 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:35:00,746 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:35:00,746 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:35:00,747 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:35:00,748 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:35:00,749 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 01:35:00,774 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:35:00,774 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:35:00,775 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:35:00,775 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:35:00,775 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:35:00,775 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:35:00,775 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:35:00,776 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:35:00,776 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:35:00,776 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:35:00,776 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:35:00,776 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:35:00,777 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:35:00,777 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:35:00,777 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:35:00,778 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:35:00,778 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:35:00,778 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:35:00,778 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:35:00,778 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:35:00,779 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:35:00,779 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:35:00,779 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:35:00,779 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:35:00,779 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:35:00,780 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:35:00,780 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:35:00,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:35:00,780 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:35:00,781 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:35:00,781 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:35:00,781 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:35:00,781 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:35:00,781 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:35:00,781 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:35:00,782 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:35:00,782 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac653d5d4bd645822c87d49861fb2a5e304e57a9bdc7e425845f1dc10a0731d2 [2021-11-07 01:35:01,054 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:35:01,077 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:35:01,080 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:35:01,081 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:35:01,083 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:35:01,084 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i [2021-11-07 01:35:01,191 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/data/52bd2c49f/7177070e2cc7424d8e80defaa8ef3506/FLAG253ae089b [2021-11-07 01:35:02,115 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:35:02,116 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i [2021-11-07 01:35:02,171 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/data/52bd2c49f/7177070e2cc7424d8e80defaa8ef3506/FLAG253ae089b [2021-11-07 01:35:02,528 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/data/52bd2c49f/7177070e2cc7424d8e80defaa8ef3506 [2021-11-07 01:35:02,531 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:35:02,533 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:35:02,538 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:35:02,538 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:35:02,541 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:35:02,542 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:35:02" (1/1) ... [2021-11-07 01:35:02,543 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2920f663 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:02, skipping insertion in model container [2021-11-07 01:35:02,543 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:35:02" (1/1) ... [2021-11-07 01:35:02,562 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:35:02,765 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:35:04,305 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:35:04,328 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:35:04,340 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:35:04,346 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:35:04,353 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:35:04,366 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:35:04,373 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:35:04,380 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:35:04,388 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:35:04,395 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:35:04,402 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:35:04,410 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:35:04,418 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:35:04,453 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:35:04,460 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:35:04,467 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:35:04,503 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:35:04,578 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:35:04,642 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:35:04,648 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:35:04,659 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:35:04,683 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:35:04,766 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:35:05,003 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:35:05,063 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:35:05,137 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:35:05,140 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:35:05,148 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:35:05,150 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:35:05,155 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:35:05,158 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:35:05,159 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:35:05,163 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:35:05,166 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:35:05,170 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:35:05,283 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_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i[258672,258685] [2021-11-07 01:35:05,407 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:35:05,463 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:35:05,463 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@47f0f905 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:05, skipping insertion in model container [2021-11-07 01:35:05,463 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:35:05,464 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:35:05,467 INFO L168 Benchmark]: Toolchain (without parser) took 2931.79 ms. Allocated memory is still 146.8 MB. Free memory was 101.6 MB in the beginning and 86.5 MB in the end (delta: 15.1 MB). Peak memory consumption was 50.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:35:05,468 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 83.9 MB. Free memory was 58.1 MB in the beginning and 58.1 MB in the end (delta: 27.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:35:05,469 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2925.95 ms. Allocated memory is still 146.8 MB. Free memory was 101.6 MB in the beginning and 86.5 MB in the end (delta: 15.1 MB). Peak memory consumption was 50.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:35:05,471 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 83.9 MB. Free memory was 58.1 MB in the beginning and 58.1 MB in the end (delta: 27.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 2925.95 ms. Allocated memory is still 146.8 MB. Free memory was 101.6 MB in the beginning and 86.5 MB in the end (delta: 15.1 MB). Peak memory consumption was 50.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 4022]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/config/TaipanReach.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_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8 --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash ac653d5d4bd645822c87d49861fb2a5e304e57a9bdc7e425845f1dc10a0731d2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:35:07,753 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:35:07,756 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:35:07,826 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:35:07,827 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:35:07,832 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:35:07,834 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:35:07,839 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:35:07,842 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:35:07,850 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:35:07,852 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:35:07,854 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:35:07,855 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:35:07,857 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:35:07,860 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:35:07,864 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:35:07,866 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:35:07,867 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:35:07,870 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:35:07,881 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:35:07,883 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:35:07,885 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:35:07,887 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:35:07,890 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:35:07,899 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:35:07,899 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:35:07,900 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:35:07,902 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:35:07,902 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:35:07,903 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:35:07,904 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:35:07,905 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:35:07,907 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:35:07,908 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:35:07,909 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:35:07,910 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:35:07,911 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:35:07,911 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:35:07,911 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:35:07,913 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:35:07,914 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:35:07,915 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 01:35:07,960 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:35:07,961 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:35:07,962 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:35:07,962 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:35:07,963 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:35:07,963 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:35:07,963 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:35:07,963 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:35:07,963 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:35:07,965 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:35:07,966 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:35:07,966 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:35:07,966 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:35:07,967 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:35:07,967 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:35:07,967 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:35:07,967 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:35:07,967 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:35:07,968 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:35:07,968 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:35:07,968 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:35:07,968 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:35:07,969 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:35:07,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:35:07,969 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:35:07,969 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:35:07,969 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:35:07,970 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:35:07,970 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:35:07,970 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:35:07,970 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:35:07,970 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:35:07,970 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac653d5d4bd645822c87d49861fb2a5e304e57a9bdc7e425845f1dc10a0731d2 [2021-11-07 01:35:08,388 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:35:08,416 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:35:08,418 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:35:08,420 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:35:08,420 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:35:08,421 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i [2021-11-07 01:35:08,495 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/data/026e6c0d2/3a6d7ab3f98b4e9fac3bd76a235920d3/FLAG16fda0754 [2021-11-07 01:35:09,477 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:35:09,478 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i [2021-11-07 01:35:09,538 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/data/026e6c0d2/3a6d7ab3f98b4e9fac3bd76a235920d3/FLAG16fda0754 [2021-11-07 01:35:09,863 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/data/026e6c0d2/3a6d7ab3f98b4e9fac3bd76a235920d3 [2021-11-07 01:35:09,866 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:35:09,867 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:35:09,869 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:35:09,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:35:09,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:35:09,876 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:35:09" (1/1) ... [2021-11-07 01:35:09,878 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@208dd56d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:09, skipping insertion in model container [2021-11-07 01:35:09,878 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:35:09" (1/1) ... [2021-11-07 01:35:09,886 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:35:10,075 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:35:12,214 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_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i[258672,258685] [2021-11-07 01:35:12,348 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:35:12,416 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:35:12,487 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:35:12,852 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_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i[258672,258685] [2021-11-07 01:35:12,866 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:35:12,882 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:35:13,413 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_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i[258672,258685] [2021-11-07 01:35:13,430 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:35:13,682 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:35:13,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:13 WrapperNode [2021-11-07 01:35:13,683 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:35:13,684 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:35:13,684 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:35:13,684 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:35:13,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:13" (1/1) ... [2021-11-07 01:35:13,825 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:13" (1/1) ... [2021-11-07 01:35:14,252 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:35:14,253 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:35:14,254 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:35:14,254 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:35:14,263 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:13" (1/1) ... [2021-11-07 01:35:14,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:13" (1/1) ... [2021-11-07 01:35:14,340 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:13" (1/1) ... [2021-11-07 01:35:14,349 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:13" (1/1) ... [2021-11-07 01:35:14,679 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:13" (1/1) ... [2021-11-07 01:35:14,717 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:13" (1/1) ... [2021-11-07 01:35:14,768 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:13" (1/1) ... [2021-11-07 01:35:14,874 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:35:14,875 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:35:14,875 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:35:14,875 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:35:14,876 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:13" (1/1) ... [2021-11-07 01:35:14,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:35:14,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:35:14,909 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:35:14,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:35:14,962 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 01:35:14,962 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2021-11-07 01:35:14,962 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2021-11-07 01:35:14,962 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 01:35:14,963 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:35:14,963 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-07 01:35:14,963 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_dtr_rts [2021-11-07 01:35:14,963 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_dtr_rts [2021-11-07 01:35:14,963 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_remove [2021-11-07 01:35:14,964 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_remove [2021-11-07 01:35:14,964 INFO L130 BoogieDeclarations]: Found specification of procedure serial_chars_in_buffer [2021-11-07 01:35:14,964 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_chars_in_buffer [2021-11-07 01:35:14,964 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~pm_message_t~0~TO~C_INT [2021-11-07 01:35:14,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~pm_message_t~0~TO~C_INT [2021-11-07 01:35:14,964 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_activate [2021-11-07 01:35:14,965 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_activate [2021-11-07 01:35:14,965 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_suspend [2021-11-07 01:35:14,965 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_suspend [2021-11-07 01:35:14,965 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~C_UINT~X~C_UINT~TO~C_INT [2021-11-07 01:35:14,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~C_UINT~X~C_UINT~TO~C_INT [2021-11-07 01:35:14,965 INFO L130 BoogieDeclarations]: Found specification of procedure serial_ioctl [2021-11-07 01:35:14,966 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_ioctl [2021-11-07 01:35:14,966 INFO L130 BoogieDeclarations]: Found specification of procedure serial_write_room [2021-11-07 01:35:14,966 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_write_room [2021-11-07 01:35:14,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:35:14,966 INFO L130 BoogieDeclarations]: Found specification of procedure serial_unthrottle [2021-11-07 01:35:14,967 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_unthrottle [2021-11-07 01:35:14,967 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_probe [2021-11-07 01:35:14,967 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_probe [2021-11-07 01:35:14,967 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:35:14,967 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2021-11-07 01:35:14,967 INFO L130 BoogieDeclarations]: Found specification of procedure serial_get_icount [2021-11-07 01:35:14,968 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_get_icount [2021-11-07 01:35:14,968 INFO L130 BoogieDeclarations]: Found specification of procedure serial_throttle [2021-11-07 01:35:14,968 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_throttle [2021-11-07 01:35:14,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-07 01:35:14,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 01:35:14,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-07 01:35:14,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:35:14,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:35:14,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 01:35:14,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-07 01:35:14,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:35:14,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 01:35:14,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-07 01:35:14,970 INFO L130 BoogieDeclarations]: Found specification of procedure serial_cleanup [2021-11-07 01:35:14,970 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_cleanup [2021-11-07 01:35:14,970 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_carrier_raised [2021-11-07 01:35:14,970 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_carrier_raised [2021-11-07 01:35:14,971 INFO L130 BoogieDeclarations]: Found specification of procedure serial_tiocmget [2021-11-07 01:35:14,971 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_tiocmget [2021-11-07 01:35:14,971 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~C_UINT~X~C_ULONG~TO~C_INT [2021-11-07 01:35:14,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~C_UINT~X~C_ULONG~TO~C_INT [2021-11-07 01:35:14,971 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_probe [2021-11-07 01:35:14,972 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_probe [2021-11-07 01:35:14,972 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_reset_resume [2021-11-07 01:35:14,972 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_reset_resume [2021-11-07 01:35:14,972 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_read_bulk_callback [2021-11-07 01:35:14,972 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_read_bulk_callback [2021-11-07 01:35:14,973 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~C_INT [2021-11-07 01:35:14,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~C_INT [2021-11-07 01:35:14,973 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_shutdown [2021-11-07 01:35:14,973 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_shutdown [2021-11-07 01:35:14,973 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_resume [2021-11-07 01:35:14,973 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_resume [2021-11-07 01:35:14,974 INFO L130 BoogieDeclarations]: Found specification of procedure single_release [2021-11-07 01:35:14,974 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2021-11-07 01:35:14,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2021-11-07 01:35:14,974 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2021-11-07 01:35:14,974 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2021-11-07 01:35:14,975 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_disconnect [2021-11-07 01:35:14,975 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_disconnect [2021-11-07 01:35:14,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:35:14,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:35:14,975 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-07 01:35:14,975 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~C_INT~TO~VOID [2021-11-07 01:35:14,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~C_INT~TO~VOID [2021-11-07 01:35:14,976 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-07 01:35:14,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-07 01:35:14,976 INFO L130 BoogieDeclarations]: Found specification of procedure serial_tiocmset [2021-11-07 01:35:14,976 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_tiocmset [2021-11-07 01:35:14,976 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_put [2021-11-07 01:35:14,977 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_put [2021-11-07 01:35:14,977 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_serial [2021-11-07 01:35:14,977 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_serial [2021-11-07 01:35:14,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:35:14,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:36:53,093 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:36:53,093 INFO L299 CfgBuilder]: Removed 1809 assume(true) statements. [2021-11-07 01:36:53,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:36:53 BoogieIcfgContainer [2021-11-07 01:36:53,099 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:36:53,101 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:36:53,101 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:36:53,105 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:36:53,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:35:09" (1/3) ... [2021-11-07 01:36:53,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5687a86b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:36:53, skipping insertion in model container [2021-11-07 01:36:53,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:35:13" (2/3) ... [2021-11-07 01:36:53,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5687a86b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:36:53, skipping insertion in model container [2021-11-07 01:36:53,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:36:53" (3/3) ... [2021-11-07 01:36:53,108 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i [2021-11-07 01:36:53,121 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:36:53,122 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 46 error locations. [2021-11-07 01:36:53,182 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:36:53,188 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:36:53,189 INFO L340 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2021-11-07 01:36:53,247 INFO L276 IsEmpty]: Start isEmpty. Operand has 1927 states, 1770 states have (on average 1.3604519774011299) internal successors, (2408), 1828 states have internal predecessors, (2408), 78 states have call successors, (78), 32 states have call predecessors, (78), 32 states have return successors, (78), 68 states have call predecessors, (78), 78 states have call successors, (78) [2021-11-07 01:36:53,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 01:36:53,250 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:53,250 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:36:53,251 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION === [serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_port_dtr_rtsErr1ASSERT_VIOLATIONERROR_FUNCTION, serial_chars_in_bufferErr0ASSERT_VIOLATIONERROR_FUNCTION (and 43 more)] === [2021-11-07 01:36:53,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:53,257 INFO L85 PathProgramCache]: Analyzing trace with hash -496465578, now seen corresponding path program 1 times [2021-11-07 01:36:53,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:53,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [217936321] [2021-11-07 01:36:53,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:53,293 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:53,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:53,297 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:53,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:37:08,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:08,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 2164 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 01:37:08,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:09,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:09,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:10,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:10,612 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:10,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [217936321] [2021-11-07 01:37:10,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [217936321] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:10,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:10,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2021-11-07 01:37:10,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772727910] [2021-11-07 01:37:10,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:37:10,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:10,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:37:10,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:37:10,643 INFO L87 Difference]: Start difference. First operand has 1927 states, 1770 states have (on average 1.3604519774011299) internal successors, (2408), 1828 states have internal predecessors, (2408), 78 states have call successors, (78), 32 states have call predecessors, (78), 32 states have return successors, (78), 68 states have call predecessors, (78), 78 states have call successors, (78) Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:18,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:18,911 INFO L93 Difference]: Finished difference Result 7751 states and 10718 transitions. [2021-11-07 01:37:18,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 01:37:18,913 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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 15 [2021-11-07 01:37:18,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:18,988 INFO L225 Difference]: With dead ends: 7751 [2021-11-07 01:37:18,988 INFO L226 Difference]: Without dead ends: 5782 [2021-11-07 01:37:19,029 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:37:19,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5782 states. [2021-11-07 01:37:19,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5782 to 1928. [2021-11-07 01:37:19,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1772 states have (on average 1.3211060948081264) internal successors, (2341), 1829 states have internal predecessors, (2341), 78 states have call successors, (78), 32 states have call predecessors, (78), 32 states have return successors, (78), 68 states have call predecessors, (78), 78 states have call successors, (78) [2021-11-07 01:37:19,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 2497 transitions. [2021-11-07 01:37:19,299 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 2497 transitions. Word has length 15 [2021-11-07 01:37:19,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:19,300 INFO L470 AbstractCegarLoop]: Abstraction has 1928 states and 2497 transitions. [2021-11-07 01:37:19,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:19,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 2497 transitions. [2021-11-07 01:37:19,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 01:37:19,301 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:19,302 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:37:19,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:19,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:37:19,527 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION === [serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_port_dtr_rtsErr1ASSERT_VIOLATIONERROR_FUNCTION, serial_chars_in_bufferErr0ASSERT_VIOLATIONERROR_FUNCTION (and 43 more)] === [2021-11-07 01:37:19,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:19,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1278541784, now seen corresponding path program 1 times [2021-11-07 01:37:19,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:19,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [217566002] [2021-11-07 01:37:19,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:19,552 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:19,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:19,553 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:19,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:37:34,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:35,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 2164 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:37:35,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:35,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:35,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:35,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:35,663 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:35,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [217566002] [2021-11-07 01:37:35,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [217566002] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:35,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:35,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:37:35,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877690541] [2021-11-07 01:37:35,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:37:35,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:35,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:37:35,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:37:35,668 INFO L87 Difference]: Start difference. First operand 1928 states and 2497 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:39,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:39,383 INFO L93 Difference]: Finished difference Result 5250 states and 6968 transitions. [2021-11-07 01:37:39,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:37:39,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-07 01:37:39,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:39,421 INFO L225 Difference]: With dead ends: 5250 [2021-11-07 01:37:39,421 INFO L226 Difference]: Without dead ends: 3474 [2021-11-07 01:37:39,434 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:37:39,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3474 states. [2021-11-07 01:37:39,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3474 to 3424. [2021-11-07 01:37:39,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3424 states, 3169 states have (on average 1.3224992111076048) internal successors, (4191), 3237 states have internal predecessors, (4191), 148 states have call successors, (148), 64 states have call predecessors, (148), 61 states have return successors, (212), 126 states have call predecessors, (212), 148 states have call successors, (212) [2021-11-07 01:37:39,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3424 states to 3424 states and 4551 transitions. [2021-11-07 01:37:39,625 INFO L78 Accepts]: Start accepts. Automaton has 3424 states and 4551 transitions. Word has length 15 [2021-11-07 01:37:39,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:39,625 INFO L470 AbstractCegarLoop]: Abstraction has 3424 states and 4551 transitions. [2021-11-07 01:37:39,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:39,626 INFO L276 IsEmpty]: Start isEmpty. Operand 3424 states and 4551 transitions. [2021-11-07 01:37:39,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 01:37:39,627 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:39,627 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:37:39,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:39,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:37:39,848 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION === [serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_port_dtr_rtsErr1ASSERT_VIOLATIONERROR_FUNCTION, serial_chars_in_bufferErr0ASSERT_VIOLATIONERROR_FUNCTION (and 43 more)] === [2021-11-07 01:37:39,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:39,849 INFO L85 PathProgramCache]: Analyzing trace with hash 980092272, now seen corresponding path program 1 times [2021-11-07 01:37:39,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:39,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [663283615] [2021-11-07 01:37:39,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:39,862 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:39,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:39,864 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:39,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:37:55,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:55,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 2165 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:37:55,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:55,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:55,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:55,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:55,908 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:55,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [663283615] [2021-11-07 01:37:55,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [663283615] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:55,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:55,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:37:55,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401657617] [2021-11-07 01:37:55,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:37:55,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:55,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:37:55,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:37:55,911 INFO L87 Difference]: Start difference. First operand 3424 states and 4551 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:58,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:58,886 INFO L93 Difference]: Finished difference Result 3424 states and 4551 transitions. [2021-11-07 01:37:58,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:37:58,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-07 01:37:58,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:58,915 INFO L225 Difference]: With dead ends: 3424 [2021-11-07 01:37:58,916 INFO L226 Difference]: Without dead ends: 3422 [2021-11-07 01:37:58,925 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:37:58,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3422 states. [2021-11-07 01:37:59,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3422 to 3422. [2021-11-07 01:37:59,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3422 states, 3168 states have (on average 1.3222853535353536) internal successors, (4189), 3235 states have internal predecessors, (4189), 148 states have call successors, (148), 64 states have call predecessors, (148), 61 states have return successors, (212), 126 states have call predecessors, (212), 148 states have call successors, (212) [2021-11-07 01:37:59,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3422 states to 3422 states and 4549 transitions. [2021-11-07 01:37:59,118 INFO L78 Accepts]: Start accepts. Automaton has 3422 states and 4549 transitions. Word has length 16 [2021-11-07 01:37:59,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:59,120 INFO L470 AbstractCegarLoop]: Abstraction has 3422 states and 4549 transitions. [2021-11-07 01:37:59,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:59,120 INFO L276 IsEmpty]: Start isEmpty. Operand 3422 states and 4549 transitions. [2021-11-07 01:37:59,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 01:37:59,126 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:59,126 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:37:59,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:59,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:37:59,343 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION === [serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_port_dtr_rtsErr1ASSERT_VIOLATIONERROR_FUNCTION, serial_chars_in_bufferErr0ASSERT_VIOLATIONERROR_FUNCTION (and 43 more)] === [2021-11-07 01:37:59,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:59,344 INFO L85 PathProgramCache]: Analyzing trace with hash 318092002, now seen corresponding path program 1 times [2021-11-07 01:37:59,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:59,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [265957561] [2021-11-07 01:37:59,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:59,356 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:59,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:59,357 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:59,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:38:14,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:14,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 2166 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:38:14,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:15,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:15,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:15,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:15,423 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:38:15,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [265957561] [2021-11-07 01:38:15,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [265957561] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:15,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:38:15,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:38:15,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536432537] [2021-11-07 01:38:15,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:38:15,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:38:15,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:38:15,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:38:15,427 INFO L87 Difference]: Start difference. First operand 3422 states and 4549 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:18,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:18,181 INFO L93 Difference]: Finished difference Result 3422 states and 4549 transitions. [2021-11-07 01:38:18,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:38:18,182 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 01:38:18,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:18,211 INFO L225 Difference]: With dead ends: 3422 [2021-11-07 01:38:18,211 INFO L226 Difference]: Without dead ends: 3420 [2021-11-07 01:38:18,214 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:38:18,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3420 states. [2021-11-07 01:38:18,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3420 to 3420. [2021-11-07 01:38:18,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3420 states, 3167 states have (on average 1.322071360909378) internal successors, (4187), 3233 states have internal predecessors, (4187), 148 states have call successors, (148), 64 states have call predecessors, (148), 61 states have return successors, (212), 126 states have call predecessors, (212), 148 states have call successors, (212) [2021-11-07 01:38:18,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3420 states to 3420 states and 4547 transitions. [2021-11-07 01:38:18,420 INFO L78 Accepts]: Start accepts. Automaton has 3420 states and 4547 transitions. Word has length 17 [2021-11-07 01:38:18,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:18,420 INFO L470 AbstractCegarLoop]: Abstraction has 3420 states and 4547 transitions. [2021-11-07 01:38:18,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:18,421 INFO L276 IsEmpty]: Start isEmpty. Operand 3420 states and 4547 transitions. [2021-11-07 01:38:18,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 01:38:18,422 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:18,422 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:38:18,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:18,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:38:18,639 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION === [serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_port_dtr_rtsErr1ASSERT_VIOLATIONERROR_FUNCTION, serial_chars_in_bufferErr0ASSERT_VIOLATIONERROR_FUNCTION (and 43 more)] === [2021-11-07 01:38:18,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:18,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1270920122, now seen corresponding path program 1 times [2021-11-07 01:38:18,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:38:18,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1209062102] [2021-11-07 01:38:18,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:18,650 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:38:18,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:38:18,651 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:38:18,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:38:33,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:33,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 2167 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:38:33,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:34,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:34,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:34,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:34,655 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:38:34,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1209062102] [2021-11-07 01:38:34,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1209062102] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:34,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:38:34,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:38:34,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716108959] [2021-11-07 01:38:34,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:38:34,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:38:34,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:38:34,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:38:34,658 INFO L87 Difference]: Start difference. First operand 3420 states and 4547 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:38,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:38,021 INFO L93 Difference]: Finished difference Result 3420 states and 4547 transitions. [2021-11-07 01:38:38,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:38:38,022 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-07 01:38:38,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:38,052 INFO L225 Difference]: With dead ends: 3420 [2021-11-07 01:38:38,052 INFO L226 Difference]: Without dead ends: 3391 [2021-11-07 01:38:38,055 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:38:38,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3391 states. [2021-11-07 01:38:38,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3391 to 3391. [2021-11-07 01:38:38,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3391 states, 3148 states have (on average 1.317979669631512) internal successors, (4149), 3204 states have internal predecessors, (4149), 148 states have call successors, (148), 64 states have call predecessors, (148), 61 states have return successors, (212), 126 states have call predecessors, (212), 148 states have call successors, (212) [2021-11-07 01:38:38,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3391 states to 3391 states and 4509 transitions. [2021-11-07 01:38:38,364 INFO L78 Accepts]: Start accepts. Automaton has 3391 states and 4509 transitions. Word has length 18 [2021-11-07 01:38:38,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:38,365 INFO L470 AbstractCegarLoop]: Abstraction has 3391 states and 4509 transitions. [2021-11-07 01:38:38,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:38,365 INFO L276 IsEmpty]: Start isEmpty. Operand 3391 states and 4509 transitions. [2021-11-07 01:38:38,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 01:38:38,374 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:38,374 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] [2021-11-07 01:38:38,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:38,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:38:38,595 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting serial_port_dtr_rtsErr1ASSERT_VIOLATIONERROR_FUNCTION === [serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_port_dtr_rtsErr1ASSERT_VIOLATIONERROR_FUNCTION, serial_chars_in_bufferErr0ASSERT_VIOLATIONERROR_FUNCTION (and 43 more)] === [2021-11-07 01:38:38,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:38,595 INFO L85 PathProgramCache]: Analyzing trace with hash -407111319, now seen corresponding path program 1 times [2021-11-07 01:38:38,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:38:38,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1462102167] [2021-11-07 01:38:38,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:38,602 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:38:38,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:38:38,603 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:38:38,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:38:53,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:53,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 2216 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:38:53,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:54,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:54,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:54,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:54,695 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:38:54,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1462102167] [2021-11-07 01:38:54,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1462102167] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:54,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:38:54,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:38:54,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35323001] [2021-11-07 01:38:54,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:38:54,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:38:54,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:38:54,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:38:54,697 INFO L87 Difference]: Start difference. First operand 3391 states and 4509 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:55,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:55,121 INFO L93 Difference]: Finished difference Result 6636 states and 8832 transitions. [2021-11-07 01:38:55,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:38:55,122 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-07 01:38:55,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:55,163 INFO L225 Difference]: With dead ends: 6636 [2021-11-07 01:38:55,163 INFO L226 Difference]: Without dead ends: 3391 [2021-11-07 01:38:55,183 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:38:55,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3391 states. [2021-11-07 01:38:55,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3391 to 3391. [2021-11-07 01:38:55,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3391 states, 3148 states have (on average 1.317662007623888) internal successors, (4148), 3204 states have internal predecessors, (4148), 148 states have call successors, (148), 64 states have call predecessors, (148), 61 states have return successors, (212), 126 states have call predecessors, (212), 148 states have call successors, (212) [2021-11-07 01:38:55,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3391 states to 3391 states and 4508 transitions. [2021-11-07 01:38:55,380 INFO L78 Accepts]: Start accepts. Automaton has 3391 states and 4508 transitions. Word has length 30 [2021-11-07 01:38:55,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:55,380 INFO L470 AbstractCegarLoop]: Abstraction has 3391 states and 4508 transitions. [2021-11-07 01:38:55,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:55,381 INFO L276 IsEmpty]: Start isEmpty. Operand 3391 states and 4508 transitions. [2021-11-07 01:38:55,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 01:38:55,383 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:55,384 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] [2021-11-07 01:38:55,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:55,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:38:55,607 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting serial_port_dtr_rtsErr1ASSERT_VIOLATIONERROR_FUNCTION === [serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_port_dtr_rtsErr1ASSERT_VIOLATIONERROR_FUNCTION, serial_chars_in_bufferErr0ASSERT_VIOLATIONERROR_FUNCTION (and 43 more)] === [2021-11-07 01:38:55,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:55,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1414437768, now seen corresponding path program 1 times [2021-11-07 01:38:55,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:38:55,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1200928633] [2021-11-07 01:38:55,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:55,615 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:38:55,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:38:55,617 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:38:55,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:39:10,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:10,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 2228 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 01:39:10,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:12,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:12,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:13,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:13,471 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:13,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1200928633] [2021-11-07 01:39:13,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1200928633] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:13,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:13,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-07 01:39:13,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048958495] [2021-11-07 01:39:13,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:39:13,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:13,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:39:13,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:39:13,474 INFO L87 Difference]: Start difference. First operand 3391 states and 4508 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:19,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:19,200 INFO L93 Difference]: Finished difference Result 7419 states and 9903 transitions. [2021-11-07 01:39:19,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:39:19,201 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-07 01:39:19,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:19,230 INFO L225 Difference]: With dead ends: 7419 [2021-11-07 01:39:19,230 INFO L226 Difference]: Without dead ends: 4038 [2021-11-07 01:39:19,251 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:39:19,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4038 states. [2021-11-07 01:39:19,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4038 to 3386. [2021-11-07 01:39:19,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3386 states, 3143 states have (on average 1.317531021317213) internal successors, (4141), 3199 states have internal predecessors, (4141), 148 states have call successors, (148), 64 states have call predecessors, (148), 61 states have return successors, (212), 126 states have call predecessors, (212), 148 states have call successors, (212) [2021-11-07 01:39:19,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3386 states to 3386 states and 4501 transitions. [2021-11-07 01:39:19,481 INFO L78 Accepts]: Start accepts. Automaton has 3386 states and 4501 transitions. Word has length 35 [2021-11-07 01:39:19,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:19,481 INFO L470 AbstractCegarLoop]: Abstraction has 3386 states and 4501 transitions. [2021-11-07 01:39:19,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:19,482 INFO L276 IsEmpty]: Start isEmpty. Operand 3386 states and 4501 transitions. [2021-11-07 01:39:19,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 01:39:19,484 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:19,484 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, 1] [2021-11-07 01:39:19,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:19,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:19,707 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting serial_port_dtr_rtsErr1ASSERT_VIOLATIONERROR_FUNCTION === [serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_port_dtr_rtsErr1ASSERT_VIOLATIONERROR_FUNCTION, serial_chars_in_bufferErr0ASSERT_VIOLATIONERROR_FUNCTION (and 43 more)] === [2021-11-07 01:39:19,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:19,708 INFO L85 PathProgramCache]: Analyzing trace with hash -456340834, now seen corresponding path program 1 times [2021-11-07 01:39:19,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:19,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [313062726] [2021-11-07 01:39:19,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:19,716 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:19,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:19,718 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:19,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:39:34,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:35,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 2243 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:39:35,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:35,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:35,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:36,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:36,161 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:36,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [313062726] [2021-11-07 01:39:36,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [313062726] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:36,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:36,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:39:36,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738040490] [2021-11-07 01:39:36,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:39:36,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:36,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:39:36,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:39:36,163 INFO L87 Difference]: Start difference. First operand 3386 states and 4501 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:36,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:36,475 INFO L93 Difference]: Finished difference Result 6759 states and 8990 transitions. [2021-11-07 01:39:36,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:39:36,476 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 38 [2021-11-07 01:39:36,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:36,502 INFO L225 Difference]: With dead ends: 6759 [2021-11-07 01:39:36,510 INFO L226 Difference]: Without dead ends: 3389 [2021-11-07 01:39:36,532 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:39:36,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3389 states. [2021-11-07 01:39:36,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3389 to 3389. [2021-11-07 01:39:36,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3389 states, 3146 states have (on average 1.3172282263191355) internal successors, (4144), 3202 states have internal predecessors, (4144), 148 states have call successors, (148), 64 states have call predecessors, (148), 61 states have return successors, (212), 126 states have call predecessors, (212), 148 states have call successors, (212) [2021-11-07 01:39:36,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3389 states to 3389 states and 4504 transitions. [2021-11-07 01:39:36,852 INFO L78 Accepts]: Start accepts. Automaton has 3389 states and 4504 transitions. Word has length 38 [2021-11-07 01:39:36,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:36,852 INFO L470 AbstractCegarLoop]: Abstraction has 3389 states and 4504 transitions. [2021-11-07 01:39:36,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:36,853 INFO L276 IsEmpty]: Start isEmpty. Operand 3389 states and 4504 transitions. [2021-11-07 01:39:36,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 01:39:36,856 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:36,856 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, 1] [2021-11-07 01:39:36,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:37,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:37,071 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting serial_port_dtr_rtsErr1ASSERT_VIOLATIONERROR_FUNCTION === [serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_port_dtr_rtsErr1ASSERT_VIOLATIONERROR_FUNCTION, serial_chars_in_bufferErr0ASSERT_VIOLATIONERROR_FUNCTION (and 43 more)] === [2021-11-07 01:39:37,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:37,073 INFO L85 PathProgramCache]: Analyzing trace with hash -972483946, now seen corresponding path program 1 times [2021-11-07 01:39:37,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:37,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [356352527] [2021-11-07 01:39:37,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:37,080 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:37,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:37,081 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:37,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:39:52,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:53,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 2253 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:39:53,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:54,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:54,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:55,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:55,069 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:55,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [356352527] [2021-11-07 01:39:55,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [356352527] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:39:55,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [224117464] [2021-11-07 01:39:55,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:55,070 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:39:55,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:39:55,085 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:39:55,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-07 01:39:58,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:58,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 2253 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:39:58,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:59,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:39:59,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:59,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:39:59,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [224117464] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:59,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:39:59,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:39:59,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987635589] [2021-11-07 01:39:59,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:39:59,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:59,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:39:59,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:39:59,583 INFO L87 Difference]: Start difference. First operand 3389 states and 4504 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:03,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:03,074 INFO L93 Difference]: Finished difference Result 6632 states and 8850 transitions. [2021-11-07 01:40:03,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:40:03,075 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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 42 [2021-11-07 01:40:03,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:03,096 INFO L225 Difference]: With dead ends: 6632 [2021-11-07 01:40:03,096 INFO L226 Difference]: Without dead ends: 3389 [2021-11-07 01:40:03,114 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:40:03,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3389 states. [2021-11-07 01:40:03,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3389 to 3369. [2021-11-07 01:40:03,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3369 states, 3133 states have (on average 1.3118416852856687) internal successors, (4110), 3184 states have internal predecessors, (4110), 148 states have call successors, (148), 64 states have call predecessors, (148), 61 states have return successors, (155), 124 states have call predecessors, (155), 142 states have call successors, (155) [2021-11-07 01:40:03,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3369 states to 3369 states and 4413 transitions. [2021-11-07 01:40:03,306 INFO L78 Accepts]: Start accepts. Automaton has 3369 states and 4413 transitions. Word has length 42 [2021-11-07 01:40:03,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:03,308 INFO L470 AbstractCegarLoop]: Abstraction has 3369 states and 4413 transitions. [2021-11-07 01:40:03,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:03,308 INFO L276 IsEmpty]: Start isEmpty. Operand 3369 states and 4413 transitions. [2021-11-07 01:40:03,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 01:40:03,311 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:03,311 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] [2021-11-07 01:40:03,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:03,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:03,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:40:03,735 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION === [serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_port_dtr_rtsErr1ASSERT_VIOLATIONERROR_FUNCTION, serial_chars_in_bufferErr0ASSERT_VIOLATIONERROR_FUNCTION (and 43 more)] === [2021-11-07 01:40:03,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:03,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1073161667, now seen corresponding path program 1 times [2021-11-07 01:40:03,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:03,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940181537] [2021-11-07 01:40:03,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:03,742 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:03,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:03,743 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:03,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:40:19,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:19,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 2284 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:40:19,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:20,797 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:40:20,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:21,759 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:40:21,759 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:21,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940181537] [2021-11-07 01:40:21,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1940181537] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:40:21,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [516711499] [2021-11-07 01:40:21,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:21,760 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:40:21,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:40:21,761 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:40:21,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-07 01:40:25,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:25,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 2284 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:40:25,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:26,684 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:40:26,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:27,170 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:40:27,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [516711499] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:27,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:40:27,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 01:40:27,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470952298] [2021-11-07 01:40:27,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:40:27,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:27,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:40:27,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:40:27,172 INFO L87 Difference]: Start difference. First operand 3369 states and 4413 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) [2021-11-07 01:40:30,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:30,346 INFO L93 Difference]: Finished difference Result 6594 states and 8645 transitions. [2021-11-07 01:40:30,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:40:30,347 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 46 [2021-11-07 01:40:30,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:30,365 INFO L225 Difference]: With dead ends: 6594 [2021-11-07 01:40:30,365 INFO L226 Difference]: Without dead ends: 3363 [2021-11-07 01:40:30,378 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:40:30,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3363 states. [2021-11-07 01:40:30,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3363 to 3363. [2021-11-07 01:40:30,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3363 states, 3127 states have (on average 1.311160857051487) internal successors, (4100), 3178 states have internal predecessors, (4100), 148 states have call successors, (148), 64 states have call predecessors, (148), 61 states have return successors, (155), 124 states have call predecessors, (155), 142 states have call successors, (155) [2021-11-07 01:40:30,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3363 states to 3363 states and 4403 transitions. [2021-11-07 01:40:30,671 INFO L78 Accepts]: Start accepts. Automaton has 3363 states and 4403 transitions. Word has length 46 [2021-11-07 01:40:30,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:30,673 INFO L470 AbstractCegarLoop]: Abstraction has 3363 states and 4403 transitions. [2021-11-07 01:40:30,674 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) [2021-11-07 01:40:30,674 INFO L276 IsEmpty]: Start isEmpty. Operand 3363 states and 4403 transitions. [2021-11-07 01:40:30,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 01:40:30,675 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:30,676 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, 1, 1, 1] [2021-11-07 01:40:30,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:30,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2021-11-07 01:40:31,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:40:31,096 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION === [serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_port_dtr_rtsErr1ASSERT_VIOLATIONERROR_FUNCTION, serial_chars_in_bufferErr0ASSERT_VIOLATIONERROR_FUNCTION (and 43 more)] === [2021-11-07 01:40:31,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:31,097 INFO L85 PathProgramCache]: Analyzing trace with hash -958827207, now seen corresponding path program 1 times [2021-11-07 01:40:31,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:31,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [505435103] [2021-11-07 01:40:31,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:31,106 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:31,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:31,109 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:31,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:40:47,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:47,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 2436 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:40:47,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:49,017 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:40:49,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:50,306 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:40:50,306 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:50,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [505435103] [2021-11-07 01:40:50,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [505435103] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:40:50,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [45885962] [2021-11-07 01:40:50,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:50,306 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:40:50,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:40:50,307 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:40:50,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-07 01:40:54,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:54,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 2436 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:40:54,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:56,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:40:56,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:58,609 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:40:58,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [45885962] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:58,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:40:58,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [5, 5] total 18 [2021-11-07 01:40:58,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555066246] [2021-11-07 01:40:58,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:40:58,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:58,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:40:58,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:40:58,611 INFO L87 Difference]: Start difference. First operand 3363 states and 4403 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:07,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:07,444 INFO L93 Difference]: Finished difference Result 6596 states and 8643 transitions. [2021-11-07 01:41:07,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:41:07,445 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 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 58 [2021-11-07 01:41:07,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:07,460 INFO L225 Difference]: With dead ends: 6596 [2021-11-07 01:41:07,461 INFO L226 Difference]: Without dead ends: 3363 [2021-11-07 01:41:07,474 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:41:07,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3363 states. [2021-11-07 01:41:07,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3363 to 3363. [2021-11-07 01:41:07,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3363 states, 3127 states have (on average 1.3105212663895107) internal successors, (4098), 3178 states have internal predecessors, (4098), 148 states have call successors, (148), 64 states have call predecessors, (148), 61 states have return successors, (155), 124 states have call predecessors, (155), 142 states have call successors, (155) [2021-11-07 01:41:07,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3363 states to 3363 states and 4401 transitions. [2021-11-07 01:41:07,660 INFO L78 Accepts]: Start accepts. Automaton has 3363 states and 4401 transitions. Word has length 58 [2021-11-07 01:41:07,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:07,660 INFO L470 AbstractCegarLoop]: Abstraction has 3363 states and 4401 transitions. [2021-11-07 01:41:07,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:07,661 INFO L276 IsEmpty]: Start isEmpty. Operand 3363 states and 4401 transitions. [2021-11-07 01:41:07,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 01:41:07,662 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:07,662 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:07,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:07,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:08,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:08,088 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_port_dtr_rtsErr1ASSERT_VIOLATIONERROR_FUNCTION, serial_chars_in_bufferErr0ASSERT_VIOLATIONERROR_FUNCTION (and 43 more)] === [2021-11-07 01:41:08,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:08,088 INFO L85 PathProgramCache]: Analyzing trace with hash -2102944719, now seen corresponding path program 1 times [2021-11-07 01:41:08,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:08,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [74759110] [2021-11-07 01:41:08,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:08,095 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:08,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:08,096 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:08,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:41:24,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:24,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 2468 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:41:24,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:26,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:26,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:27,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:27,516 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:27,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [74759110] [2021-11-07 01:41:27,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [74759110] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:41:27,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1248484266] [2021-11-07 01:41:27,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:27,516 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:41:27,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:41:27,517 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:41:27,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:41:31,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:31,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 2468 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:41:31,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:32,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:41:32,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:32,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:41:32,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1248484266] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:32,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:41:32,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:41:32,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459832553] [2021-11-07 01:41:32,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:41:32,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:32,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:41:32,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:41:32,637 INFO L87 Difference]: Start difference. First operand 3363 states and 4401 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:35,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:35,983 INFO L93 Difference]: Finished difference Result 3363 states and 4401 transitions. [2021-11-07 01:41:35,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:41:35,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 58 [2021-11-07 01:41:35,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:36,002 INFO L225 Difference]: With dead ends: 3363 [2021-11-07 01:41:36,002 INFO L226 Difference]: Without dead ends: 3318 [2021-11-07 01:41:36,005 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:41:36,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3318 states. [2021-11-07 01:41:36,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3318 to 3318. [2021-11-07 01:41:36,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3318 states, 3094 states have (on average 1.3051066580478345) internal successors, (4038), 3133 states have internal predecessors, (4038), 148 states have call successors, (148), 64 states have call predecessors, (148), 61 states have return successors, (155), 124 states have call predecessors, (155), 142 states have call successors, (155) [2021-11-07 01:41:36,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3318 states to 3318 states and 4341 transitions. [2021-11-07 01:41:36,303 INFO L78 Accepts]: Start accepts. Automaton has 3318 states and 4341 transitions. Word has length 58 [2021-11-07 01:41:36,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:36,304 INFO L470 AbstractCegarLoop]: Abstraction has 3318 states and 4341 transitions. [2021-11-07 01:41:36,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:36,304 INFO L276 IsEmpty]: Start isEmpty. Operand 3318 states and 4341 transitions. [2021-11-07 01:41:36,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:41:36,307 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:36,307 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:36,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:36,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 01:41:36,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:36,732 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION === [serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_port_dtr_rtsErr1ASSERT_VIOLATIONERROR_FUNCTION, serial_chars_in_bufferErr0ASSERT_VIOLATIONERROR_FUNCTION (and 43 more)] === [2021-11-07 01:41:36,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:36,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1227209004, now seen corresponding path program 1 times [2021-11-07 01:41:36,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:36,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1946567084] [2021-11-07 01:41:36,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:36,739 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:36,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:36,740 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:36,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:41:53,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:53,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 2479 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:41:53,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:55,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:41:55,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:56,909 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:41:56,909 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:56,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1946567084] [2021-11-07 01:41:56,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1946567084] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:41:56,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1016381268] [2021-11-07 01:41:56,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:56,910 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:41:56,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:41:56,911 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:41:56,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 01:42:01,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:01,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 2479 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 01:42:01,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:03,991 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:42:03,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:07,051 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 01:42:07,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1016381268] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:07,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:42:07,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [5, 5] total 18 [2021-11-07 01:42:07,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789504147] [2021-11-07 01:42:07,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:42:07,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:07,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:42:07,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:42:07,054 INFO L87 Difference]: Start difference. First operand 3318 states and 4341 transitions. Second operand has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 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) [2021-11-07 01:42:12,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:12,373 INFO L93 Difference]: Finished difference Result 6606 states and 8650 transitions. [2021-11-07 01:42:12,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:42:12,374 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 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 66 [2021-11-07 01:42:12,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:12,390 INFO L225 Difference]: With dead ends: 6606 [2021-11-07 01:42:12,390 INFO L226 Difference]: Without dead ends: 3318 [2021-11-07 01:42:12,404 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:42:12,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3318 states. [2021-11-07 01:42:12,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3318 to 3318. [2021-11-07 01:42:12,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3318 states, 3094 states have (on average 1.3047834518422754) internal successors, (4037), 3133 states have internal predecessors, (4037), 148 states have call successors, (148), 64 states have call predecessors, (148), 61 states have return successors, (155), 124 states have call predecessors, (155), 142 states have call successors, (155) [2021-11-07 01:42:12,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3318 states to 3318 states and 4340 transitions. [2021-11-07 01:42:12,585 INFO L78 Accepts]: Start accepts. Automaton has 3318 states and 4340 transitions. Word has length 66 [2021-11-07 01:42:12,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:12,587 INFO L470 AbstractCegarLoop]: Abstraction has 3318 states and 4340 transitions. [2021-11-07 01:42:12,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 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) [2021-11-07 01:42:12,587 INFO L276 IsEmpty]: Start isEmpty. Operand 3318 states and 4340 transitions. [2021-11-07 01:42:12,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:42:12,589 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:12,590 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:12,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:12,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:13,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:42:13,011 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION === [serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_port_dtr_rtsErr1ASSERT_VIOLATIONERROR_FUNCTION, serial_chars_in_bufferErr0ASSERT_VIOLATIONERROR_FUNCTION (and 43 more)] === [2021-11-07 01:42:13,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:13,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1105961729, now seen corresponding path program 1 times [2021-11-07 01:42:13,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:13,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1666528513] [2021-11-07 01:42:13,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:13,018 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:13,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:13,021 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:13,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:42:29,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:29,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 2494 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:42:29,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:31,456 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:42:31,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:33,056 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:42:33,056 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:33,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1666528513] [2021-11-07 01:42:33,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1666528513] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:42:33,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [489050793] [2021-11-07 01:42:33,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:33,056 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:42:33,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:42:33,058 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:42:33,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 01:42:41,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:41,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 2494 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:42:41,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:42,708 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:42:42,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:43,762 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:42:43,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [489050793] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:42:43,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141328715] [2021-11-07 01:42:43,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:43,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:42:43,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:42:43,764 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:42:43,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-07 01:42:46,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:47,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 2494 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:42:47,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:48,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:42:48,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:49,323 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:42:49,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141328715] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:42:49,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:42:49,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-07 01:42:49,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246370560] [2021-11-07 01:42:49,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:42:49,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:49,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:42:49,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:42:49,326 INFO L87 Difference]: Start difference. First operand 3318 states and 4340 transitions. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:50,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:50,644 INFO L93 Difference]: Finished difference Result 6625 states and 8672 transitions. [2021-11-07 01:42:50,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:42:50,645 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 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 69 [2021-11-07 01:42:50,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:50,661 INFO L225 Difference]: With dead ends: 6625 [2021-11-07 01:42:50,661 INFO L226 Difference]: Without dead ends: 3326 [2021-11-07 01:42:50,674 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:42:50,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3326 states. [2021-11-07 01:42:50,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3326 to 3326. [2021-11-07 01:42:50,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3326 states, 3102 states have (on average 1.3039974210186975) internal successors, (4045), 3141 states have internal predecessors, (4045), 148 states have call successors, (148), 64 states have call predecessors, (148), 61 states have return successors, (155), 124 states have call predecessors, (155), 142 states have call successors, (155) [2021-11-07 01:42:50,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3326 states to 3326 states and 4348 transitions. [2021-11-07 01:42:50,853 INFO L78 Accepts]: Start accepts. Automaton has 3326 states and 4348 transitions. Word has length 69 [2021-11-07 01:42:50,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:50,854 INFO L470 AbstractCegarLoop]: Abstraction has 3326 states and 4348 transitions. [2021-11-07 01:42:50,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:50,854 INFO L276 IsEmpty]: Start isEmpty. Operand 3326 states and 4348 transitions. [2021-11-07 01:42:50,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:42:50,856 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:50,856 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:50,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:51,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:51,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:51,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:42:51,479 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION === [serial_port_dtr_rtsErr0ASSERT_VIOLATIONERROR_FUNCTION, serial_port_dtr_rtsErr1ASSERT_VIOLATIONERROR_FUNCTION, serial_chars_in_bufferErr0ASSERT_VIOLATIONERROR_FUNCTION (and 43 more)] === [2021-11-07 01:42:51,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:51,480 INFO L85 PathProgramCache]: Analyzing trace with hash -521008369, now seen corresponding path program 2 times [2021-11-07 01:42:51,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:51,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1083118240] [2021-11-07 01:42:51,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:42:51,487 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:51,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:51,488 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:51,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8cf62d3-7634-4d57-a4c8-8b32eb2297e9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process