./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--input--touchscreen--usbtouchscreen.ko-entry_point.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_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/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_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--input--touchscreen--usbtouchscreen.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/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_b14ca0c9-bbbe-463c-a666-004de62bbbd6/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 5c13092b5fe0ffbf7fbf1fe31d493be6a68ca2455b811b10fd7983ff470e432f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:06:04,416 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:06:04,420 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:06:04,477 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:06:04,487 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:06:04,489 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:06:04,493 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:06:04,502 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:06:04,506 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:06:04,509 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:06:04,510 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:06:04,515 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:06:04,516 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:06:04,526 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:06:04,528 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:06:04,532 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:06:04,535 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:06:04,538 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:06:04,541 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:06:04,549 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:06:04,557 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:06:04,559 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:06:04,561 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:06:04,563 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:06:04,573 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:06:04,574 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:06:04,574 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:06:04,577 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:06:04,578 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:06:04,580 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:06:04,581 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:06:04,582 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:06:04,584 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:06:04,586 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:06:04,588 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:06:04,589 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:06:04,590 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:06:04,590 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:06:04,590 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:06:04,592 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:06:04,593 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:06:04,594 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 02:06:04,651 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:06:04,651 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:06:04,653 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:06:04,653 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:06:04,654 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:06:04,654 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:06:04,654 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:06:04,655 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:06:04,655 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:06:04,655 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:06:04,657 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:06:04,657 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:06:04,657 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:06:04,658 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:06:04,658 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:06:04,659 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:06:04,659 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:06:04,659 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:06:04,660 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:06:04,660 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:06:04,660 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:06:04,661 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:06:04,661 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:06:04,661 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:06:04,661 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:06:04,662 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:06:04,662 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:06:04,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:06:04,663 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:06:04,665 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:06:04,665 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:06:04,666 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:06:04,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:06:04,666 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:06:04,667 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:06:04,667 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:06:04,667 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_b14ca0c9-bbbe-463c-a666-004de62bbbd6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5c13092b5fe0ffbf7fbf1fe31d493be6a68ca2455b811b10fd7983ff470e432f [2021-11-07 02:06:05,030 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:06:05,072 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:06:05,075 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:06:05,078 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:06:05,079 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:06:05,080 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--input--touchscreen--usbtouchscreen.ko-entry_point.cil.out.i [2021-11-07 02:06:05,167 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/data/53646d1df/8592a2ac667445d39737ff34b23ccd63/FLAG347b008a8 [2021-11-07 02:06:06,233 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:06:06,234 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--input--touchscreen--usbtouchscreen.ko-entry_point.cil.out.i [2021-11-07 02:06:06,290 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/data/53646d1df/8592a2ac667445d39737ff34b23ccd63/FLAG347b008a8 [2021-11-07 02:06:06,592 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/data/53646d1df/8592a2ac667445d39737ff34b23ccd63 [2021-11-07 02:06:06,595 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:06:06,597 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:06:06,599 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:06:06,599 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:06:06,603 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:06:06,605 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:06:06" (1/1) ... [2021-11-07 02:06:06,606 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21a02d57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:06, skipping insertion in model container [2021-11-07 02:06:06,607 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:06:06" (1/1) ... [2021-11-07 02:06:06,616 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:06:06,797 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:06:07,757 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_b14ca0c9-bbbe-463c-a666-004de62bbbd6/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--input--touchscreen--usbtouchscreen.ko-entry_point.cil.out.i[108030,108043] [2021-11-07 02:06:08,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:06:08,542 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 02:06:08,543 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1a85d253 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:08, skipping insertion in model container [2021-11-07 02:06:08,544 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:06:08,544 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:06:08,548 INFO L168 Benchmark]: Toolchain (without parser) took 1948.96 ms. Allocated memory was 115.3 MB in the beginning and 153.1 MB in the end (delta: 37.7 MB). Free memory was 65.0 MB in the beginning and 98.3 MB in the end (delta: -33.3 MB). Peak memory consumption was 22.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:06:08,549 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 115.3 MB. Free memory is still 89.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:06:08,551 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1945.42 ms. Allocated memory was 115.3 MB in the beginning and 153.1 MB in the end (delta: 37.7 MB). Free memory was 64.8 MB in the beginning and 98.3 MB in the end (delta: -33.5 MB). Peak memory consumption was 22.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:06:08,553 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 115.3 MB. Free memory is still 89.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1945.42 ms. Allocated memory was 115.3 MB in the beginning and 153.1 MB in the end (delta: 37.7 MB). Free memory was 64.8 MB in the beginning and 98.3 MB in the end (delta: -33.5 MB). Peak memory consumption was 22.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 4556]: 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_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/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_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--input--touchscreen--usbtouchscreen.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/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_b14ca0c9-bbbe-463c-a666-004de62bbbd6/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 5c13092b5fe0ffbf7fbf1fe31d493be6a68ca2455b811b10fd7983ff470e432f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:06:11,439 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:06:11,444 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:06:11,510 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:06:11,511 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:06:11,517 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:06:11,519 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:06:11,525 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:06:11,529 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:06:11,539 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:06:11,541 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:06:11,544 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:06:11,544 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:06:11,548 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:06:11,550 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:06:11,556 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:06:11,558 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:06:11,560 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:06:11,563 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:06:11,573 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:06:11,576 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:06:11,578 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:06:11,581 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:06:11,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:06:11,596 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:06:11,597 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:06:11,598 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:06:11,601 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:06:11,601 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:06:11,603 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:06:11,603 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:06:11,605 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:06:11,608 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:06:11,609 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:06:11,611 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:06:11,611 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:06:11,613 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:06:11,613 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:06:11,613 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:06:11,616 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:06:11,617 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:06:11,623 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 02:06:11,680 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:06:11,681 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:06:11,682 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:06:11,683 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:06:11,683 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:06:11,683 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:06:11,684 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:06:11,684 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:06:11,684 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:06:11,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:06:11,688 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:06:11,688 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:06:11,688 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:06:11,688 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:06:11,689 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:06:11,689 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:06:11,689 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:06:11,690 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:06:11,690 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:06:11,690 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:06:11,691 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:06:11,691 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:06:11,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:06:11,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:06:11,692 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:06:11,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:06:11,692 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:06:11,693 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:06:11,693 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:06:11,693 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:06:11,693 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:06:11,694 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:06:11,694 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_b14ca0c9-bbbe-463c-a666-004de62bbbd6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5c13092b5fe0ffbf7fbf1fe31d493be6a68ca2455b811b10fd7983ff470e432f [2021-11-07 02:06:12,155 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:06:12,186 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:06:12,190 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:06:12,191 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:06:12,192 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:06:12,194 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--input--touchscreen--usbtouchscreen.ko-entry_point.cil.out.i [2021-11-07 02:06:12,280 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/data/039b212ed/05c1f65e33a0498d9fbd7f9de717cfc3/FLAGf24b18ad7 [2021-11-07 02:06:13,421 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:06:13,421 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--input--touchscreen--usbtouchscreen.ko-entry_point.cil.out.i [2021-11-07 02:06:13,502 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/data/039b212ed/05c1f65e33a0498d9fbd7f9de717cfc3/FLAGf24b18ad7 [2021-11-07 02:06:13,717 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/data/039b212ed/05c1f65e33a0498d9fbd7f9de717cfc3 [2021-11-07 02:06:13,719 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:06:13,721 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:06:13,724 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:06:13,725 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:06:13,729 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:06:13,730 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:06:13" (1/1) ... [2021-11-07 02:06:13,731 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43550aad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:13, skipping insertion in model container [2021-11-07 02:06:13,732 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:06:13" (1/1) ... [2021-11-07 02:06:13,741 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:06:13,881 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:06:14,851 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_b14ca0c9-bbbe-463c-a666-004de62bbbd6/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--input--touchscreen--usbtouchscreen.ko-entry_point.cil.out.i[108030,108043] [2021-11-07 02:06:15,644 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:06:15,745 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:06:15,821 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:06:15,974 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_b14ca0c9-bbbe-463c-a666-004de62bbbd6/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--input--touchscreen--usbtouchscreen.ko-entry_point.cil.out.i[108030,108043] [2021-11-07 02:06:16,219 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:06:16,272 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:06:16,396 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_b14ca0c9-bbbe-463c-a666-004de62bbbd6/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--input--touchscreen--usbtouchscreen.ko-entry_point.cil.out.i[108030,108043] [2021-11-07 02:06:16,650 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:06:16,930 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:06:16,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:16 WrapperNode [2021-11-07 02:06:16,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:06:16,933 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:06:16,933 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:06:16,934 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:06:16,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:16" (1/1) ... [2021-11-07 02:06:17,094 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:16" (1/1) ... [2021-11-07 02:06:17,344 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:06:17,345 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:06:17,345 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:06:17,345 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:06:17,357 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:16" (1/1) ... [2021-11-07 02:06:17,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:16" (1/1) ... [2021-11-07 02:06:17,416 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:16" (1/1) ... [2021-11-07 02:06:17,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:16" (1/1) ... [2021-11-07 02:06:17,734 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:16" (1/1) ... [2021-11-07 02:06:17,771 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:16" (1/1) ... [2021-11-07 02:06:17,812 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:16" (1/1) ... [2021-11-07 02:06:17,856 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:06:17,859 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:06:17,859 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:06:17,859 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:06:17,865 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:16" (1/1) ... [2021-11-07 02:06:17,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:06:17,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:06:17,908 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:06:18,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:06:18,052 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 02:06:18,053 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 02:06:18,053 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_8 [2021-11-07 02:06:18,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_8 [2021-11-07 02:06:18,053 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_5 [2021-11-07 02:06:18,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_5 [2021-11-07 02:06:18,054 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_6 [2021-11-07 02:06:18,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_6 [2021-11-07 02:06:18,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 02:06:18,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 02:06:18,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-07 02:06:18,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 02:06:18,055 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2021-11-07 02:06:18,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2021-11-07 02:06:18,056 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~C_INT [2021-11-07 02:06:18,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~C_INT [2021-11-07 02:06:18,056 INFO L130 BoogieDeclarations]: Found specification of procedure usbtouch_resume [2021-11-07 02:06:18,056 INFO L138 BoogieDeclarations]: Found implementation of procedure usbtouch_resume [2021-11-07 02:06:18,056 INFO L130 BoogieDeclarations]: Found specification of procedure usbtouch_reset_resume [2021-11-07 02:06:18,057 INFO L138 BoogieDeclarations]: Found implementation of procedure usbtouch_reset_resume [2021-11-07 02:06:18,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-07 02:06:18,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-07 02:06:18,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-07 02:06:18,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-07 02:06:18,058 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~C_INT~TO~VOID [2021-11-07 02:06:18,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~C_INT~TO~VOID [2021-11-07 02:06:18,059 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2021-11-07 02:06:18,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2021-11-07 02:06:18,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 02:06:18,060 INFO L130 BoogieDeclarations]: Found specification of procedure usbtouch_disconnect [2021-11-07 02:06:18,060 INFO L138 BoogieDeclarations]: Found implementation of procedure usbtouch_disconnect [2021-11-07 02:06:18,060 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_22 [2021-11-07 02:06:18,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_22 [2021-11-07 02:06:18,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 02:06:18,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:06:18,061 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-07 02:06:18,061 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-07 02:06:18,062 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-07 02:06:18,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-07 02:06:18,062 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-07 02:06:18,063 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 02:06:18,063 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_14 [2021-11-07 02:06:18,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_14 [2021-11-07 02:06:18,064 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_16 [2021-11-07 02:06:18,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_16 [2021-11-07 02:06:18,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-07 02:06:18,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 02:06:18,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-07 02:06:18,065 INFO L130 BoogieDeclarations]: Found specification of procedure usbtouch_probe [2021-11-07 02:06:18,065 INFO L138 BoogieDeclarations]: Found implementation of procedure usbtouch_probe [2021-11-07 02:06:18,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 02:06:18,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 02:06:18,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 02:06:18,067 INFO L130 BoogieDeclarations]: Found specification of procedure usbtouch_open [2021-11-07 02:06:18,068 INFO L138 BoogieDeclarations]: Found implementation of procedure usbtouch_open [2021-11-07 02:06:18,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-07 02:06:18,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:06:18,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 02:06:18,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-07 02:06:18,069 INFO L130 BoogieDeclarations]: Found specification of procedure usbtouch_irq [2021-11-07 02:06:18,069 INFO L138 BoogieDeclarations]: Found implementation of procedure usbtouch_irq [2021-11-07 02:06:18,070 INFO L130 BoogieDeclarations]: Found specification of procedure usbtouch_process_pkt [2021-11-07 02:06:18,070 INFO L138 BoogieDeclarations]: Found implementation of procedure usbtouch_process_pkt [2021-11-07 02:06:18,071 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-07 02:06:18,071 INFO L130 BoogieDeclarations]: Found specification of procedure nexio_read_data [2021-11-07 02:06:18,071 INFO L138 BoogieDeclarations]: Found implementation of procedure nexio_read_data [2021-11-07 02:06:18,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:06:18,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:06:18,072 INFO L130 BoogieDeclarations]: Found specification of procedure usbtouch_process_multi [2021-11-07 02:06:18,072 INFO L138 BoogieDeclarations]: Found implementation of procedure usbtouch_process_multi [2021-11-07 02:07:33,707 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:07:33,708 INFO L299 CfgBuilder]: Removed 685 assume(true) statements. [2021-11-07 02:07:33,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:07:33 BoogieIcfgContainer [2021-11-07 02:07:33,713 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:07:33,716 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:07:33,716 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:07:33,720 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:07:33,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:06:13" (1/3) ... [2021-11-07 02:07:33,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18dfa1d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:07:33, skipping insertion in model container [2021-11-07 02:07:33,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:16" (2/3) ... [2021-11-07 02:07:33,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18dfa1d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:07:33, skipping insertion in model container [2021-11-07 02:07:33,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:07:33" (3/3) ... [2021-11-07 02:07:33,724 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--input--touchscreen--usbtouchscreen.ko-entry_point.cil.out.i [2021-11-07 02:07:33,731 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:07:33,732 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-11-07 02:07:33,803 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:07:33,811 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 02:07:33,811 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-11-07 02:07:33,865 INFO L276 IsEmpty]: Start isEmpty. Operand has 922 states, 856 states have (on average 1.419392523364486) internal successors, (1215), 867 states have internal predecessors, (1215), 37 states have call successors, (37), 20 states have call predecessors, (37), 20 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2021-11-07 02:07:33,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 02:07:33,873 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:33,874 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 02:07:33,875 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION, usbtouch_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, usbtouch_openErr0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 02:07:33,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:33,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1200678153, now seen corresponding path program 1 times [2021-11-07 02:07:33,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:33,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [564595562] [2021-11-07 02:07:33,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:33,909 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:33,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:33,913 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:33,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:07:37,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:37,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 2321 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:07:37,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:37,769 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 02:07:37,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:37,942 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 02:07:37,943 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:37,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [564595562] [2021-11-07 02:07:37,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [564595562] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:37,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:37,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:07:37,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074471005] [2021-11-07 02:07:37,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:07:37,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:37,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:07:37,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:07:37,978 INFO L87 Difference]: Start difference. First operand has 922 states, 856 states have (on average 1.419392523364486) internal successors, (1215), 867 states have internal predecessors, (1215), 37 states have call successors, (37), 20 states have call predecessors, (37), 20 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 02:07:38,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:38,231 INFO L93 Difference]: Finished difference Result 1841 states and 2612 transitions. [2021-11-07 02:07:38,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:07:38,233 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 02:07:38,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:38,272 INFO L225 Difference]: With dead ends: 1841 [2021-11-07 02:07:38,272 INFO L226 Difference]: Without dead ends: 904 [2021-11-07 02:07:38,285 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:07:38,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2021-11-07 02:07:38,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 904. [2021-11-07 02:07:38,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 839 states have (on average 1.367103694874851) internal successors, (1147), 849 states have internal predecessors, (1147), 37 states have call successors, (37), 20 states have call predecessors, (37), 20 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2021-11-07 02:07:38,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1221 transitions. [2021-11-07 02:07:38,512 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1221 transitions. Word has length 17 [2021-11-07 02:07:38,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:38,513 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 1221 transitions. [2021-11-07 02:07:38,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 02:07:38,514 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1221 transitions. [2021-11-07 02:07:38,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 02:07:38,517 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:38,518 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:38,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:38,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:38,735 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION, usbtouch_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, usbtouch_openErr0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 02:07:38,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:38,736 INFO L85 PathProgramCache]: Analyzing trace with hash -346978455, now seen corresponding path program 1 times [2021-11-07 02:07:38,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:38,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [663763414] [2021-11-07 02:07:38,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:38,749 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:38,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:38,751 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:38,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:07:42,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:42,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 2331 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:07:42,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:42,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:42,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:43,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:43,283 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:43,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [663763414] [2021-11-07 02:07:43,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [663763414] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:07:43,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1075033513] [2021-11-07 02:07:43,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:43,284 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:07:43,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:07:43,288 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:07:43,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-07 02:07:45,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:45,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 2331 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:45,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:45,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:07:45,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:45,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:07:45,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1075033513] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:45,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:07:45,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-07 02:07:45,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720716921] [2021-11-07 02:07:45,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:07:45,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:45,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:07:45,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:07:45,869 INFO L87 Difference]: Start difference. First operand 904 states and 1221 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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 02:07:49,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:49,628 INFO L93 Difference]: Finished difference Result 3525 states and 4784 transitions. [2021-11-07 02:07:49,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:07:49,630 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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 19 [2021-11-07 02:07:49,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:49,658 INFO L225 Difference]: With dead ends: 3525 [2021-11-07 02:07:49,659 INFO L226 Difference]: Without dead ends: 2633 [2021-11-07 02:07:49,665 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:07:49,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2633 states. [2021-11-07 02:07:49,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2633 to 2621. [2021-11-07 02:07:49,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2621 states, 2442 states have (on average 1.3697788697788698) internal successors, (3345), 2458 states have internal predecessors, (3345), 111 states have call successors, (111), 60 states have call predecessors, (111), 60 states have return successors, (111), 105 states have call predecessors, (111), 111 states have call successors, (111) [2021-11-07 02:07:49,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2621 states to 2621 states and 3567 transitions. [2021-11-07 02:07:49,862 INFO L78 Accepts]: Start accepts. Automaton has 2621 states and 3567 transitions. Word has length 19 [2021-11-07 02:07:49,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:49,863 INFO L470 AbstractCegarLoop]: Abstraction has 2621 states and 3567 transitions. [2021-11-07 02:07:49,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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 02:07:49,863 INFO L276 IsEmpty]: Start isEmpty. Operand 2621 states and 3567 transitions. [2021-11-07 02:07:49,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 02:07:49,866 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:49,866 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 02:07:49,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:50,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:50,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:50,281 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION, usbtouch_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, usbtouch_openErr0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 02:07:50,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:50,282 INFO L85 PathProgramCache]: Analyzing trace with hash 491465180, now seen corresponding path program 1 times [2021-11-07 02:07:50,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:50,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1380120532] [2021-11-07 02:07:50,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:50,297 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:50,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:50,298 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:50,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:07:53,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:53,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 2367 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:07:53,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:54,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:54,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:54,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:54,723 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:54,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1380120532] [2021-11-07 02:07:54,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1380120532] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:07:54,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1020206575] [2021-11-07 02:07:54,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:54,724 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:07:54,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:07:54,725 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:07:54,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-07 02:07:56,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:56,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 2367 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:56,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:56,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:07:56,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:56,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:07:56,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1020206575] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:56,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:07:56,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 02:07:56,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995388733] [2021-11-07 02:07:56,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:07:56,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:56,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:07:56,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:07:56,940 INFO L87 Difference]: Start difference. First operand 2621 states and 3567 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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 02:07:57,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:57,438 INFO L93 Difference]: Finished difference Result 2651 states and 3595 transitions. [2021-11-07 02:07:57,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:07:57,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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 26 [2021-11-07 02:07:57,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:57,462 INFO L225 Difference]: With dead ends: 2651 [2021-11-07 02:07:57,462 INFO L226 Difference]: Without dead ends: 2636 [2021-11-07 02:07:57,465 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:07:57,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2021-11-07 02:07:57,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 2621. [2021-11-07 02:07:57,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2621 states, 2442 states have (on average 1.3693693693693694) internal successors, (3344), 2458 states have internal predecessors, (3344), 111 states have call successors, (111), 60 states have call predecessors, (111), 60 states have return successors, (111), 105 states have call predecessors, (111), 111 states have call successors, (111) [2021-11-07 02:07:57,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2621 states to 2621 states and 3566 transitions. [2021-11-07 02:07:57,650 INFO L78 Accepts]: Start accepts. Automaton has 2621 states and 3566 transitions. Word has length 26 [2021-11-07 02:07:57,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:57,650 INFO L470 AbstractCegarLoop]: Abstraction has 2621 states and 3566 transitions. [2021-11-07 02:07:57,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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 02:07:57,651 INFO L276 IsEmpty]: Start isEmpty. Operand 2621 states and 3566 transitions. [2021-11-07 02:07:57,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 02:07:57,653 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:57,654 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 02:07:57,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:57,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:58,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:58,070 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION, usbtouch_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, usbtouch_openErr0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 02:07:58,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:58,071 INFO L85 PathProgramCache]: Analyzing trace with hash 491524762, now seen corresponding path program 1 times [2021-11-07 02:07:58,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:58,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1142983780] [2021-11-07 02:07:58,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:58,080 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:58,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:58,085 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:58,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:08:01,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:01,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 2366 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:08:01,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:01,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:01,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:02,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:02,164 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:02,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1142983780] [2021-11-07 02:08:02,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1142983780] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:02,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1860979784] [2021-11-07 02:08:02,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:02,165 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:02,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:08:02,166 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:08:02,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-07 02:08:04,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:04,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 2366 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:08:04,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:04,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:08:04,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:05,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:08:05,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1860979784] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:05,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:08:05,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 10 [2021-11-07 02:08:05,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46395704] [2021-11-07 02:08:05,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:08:05,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:05,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:08:05,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:08:05,204 INFO L87 Difference]: Start difference. First operand 2621 states and 3566 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 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 02:08:05,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:05,991 INFO L93 Difference]: Finished difference Result 7837 states and 11113 transitions. [2021-11-07 02:08:05,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:08:05,993 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 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 26 [2021-11-07 02:08:05,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:06,098 INFO L225 Difference]: With dead ends: 7837 [2021-11-07 02:08:06,099 INFO L226 Difference]: Without dead ends: 5228 [2021-11-07 02:08:06,120 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:08:06,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5228 states. [2021-11-07 02:08:06,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5228 to 5210. [2021-11-07 02:08:06,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5210 states, 4860 states have (on average 1.3681069958847736) internal successors, (6649), 4885 states have internal predecessors, (6649), 222 states have call successors, (222), 120 states have call predecessors, (222), 120 states have return successors, (444), 210 states have call predecessors, (444), 222 states have call successors, (444) [2021-11-07 02:08:06,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5210 states to 5210 states and 7315 transitions. [2021-11-07 02:08:06,566 INFO L78 Accepts]: Start accepts. Automaton has 5210 states and 7315 transitions. Word has length 26 [2021-11-07 02:08:06,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:06,567 INFO L470 AbstractCegarLoop]: Abstraction has 5210 states and 7315 transitions. [2021-11-07 02:08:06,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 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 02:08:06,567 INFO L276 IsEmpty]: Start isEmpty. Operand 5210 states and 7315 transitions. [2021-11-07 02:08:06,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 02:08:06,573 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:06,573 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 02:08:06,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:06,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:06,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:08:06,987 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION, usbtouch_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, usbtouch_openErr0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 02:08:06,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:06,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1942600834, now seen corresponding path program 1 times [2021-11-07 02:08:06,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:06,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [692055235] [2021-11-07 02:08:06,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:06,996 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:06,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:06,997 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:07,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:08:10,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:10,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 2367 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:08:10,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:10,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:10,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:11,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:11,308 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:11,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [692055235] [2021-11-07 02:08:11,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [692055235] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:11,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1456103150] [2021-11-07 02:08:11,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:11,309 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:11,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:08:11,314 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:08:11,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-07 02:08:13,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:13,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 2367 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:08:13,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:14,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:08:14,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:14,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:08:14,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1456103150] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:14,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:08:14,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 10 [2021-11-07 02:08:14,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440177822] [2021-11-07 02:08:14,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:08:14,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:14,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:08:14,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:08:14,467 INFO L87 Difference]: Start difference. First operand 5210 states and 7315 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 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 02:08:15,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:15,098 INFO L93 Difference]: Finished difference Result 5210 states and 7315 transitions. [2021-11-07 02:08:15,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:08:15,100 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 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 27 [2021-11-07 02:08:15,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:15,150 INFO L225 Difference]: With dead ends: 5210 [2021-11-07 02:08:15,150 INFO L226 Difference]: Without dead ends: 5208 [2021-11-07 02:08:15,155 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:08:15,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5208 states. [2021-11-07 02:08:15,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5208 to 5208. [2021-11-07 02:08:15,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5208 states, 4859 states have (on average 1.3679769499897099) internal successors, (6647), 4883 states have internal predecessors, (6647), 222 states have call successors, (222), 120 states have call predecessors, (222), 120 states have return successors, (444), 210 states have call predecessors, (444), 222 states have call successors, (444) [2021-11-07 02:08:15,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5208 states to 5208 states and 7313 transitions. [2021-11-07 02:08:15,602 INFO L78 Accepts]: Start accepts. Automaton has 5208 states and 7313 transitions. Word has length 27 [2021-11-07 02:08:15,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:15,603 INFO L470 AbstractCegarLoop]: Abstraction has 5208 states and 7313 transitions. [2021-11-07 02:08:15,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 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 02:08:15,603 INFO L276 IsEmpty]: Start isEmpty. Operand 5208 states and 7313 transitions. [2021-11-07 02:08:15,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 02:08:15,605 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:15,605 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 02:08:15,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:15,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:16,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:16,021 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION, usbtouch_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, usbtouch_openErr0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 02:08:16,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:16,022 INFO L85 PathProgramCache]: Analyzing trace with hash -91082972, now seen corresponding path program 1 times [2021-11-07 02:08:16,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:16,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2003456200] [2021-11-07 02:08:16,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:16,029 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:16,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:16,031 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:16,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:08:19,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:19,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 2368 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:08:19,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:19,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:19,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:20,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:20,017 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:20,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2003456200] [2021-11-07 02:08:20,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2003456200] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:20,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [779907430] [2021-11-07 02:08:20,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:20,018 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:20,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:08:20,019 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:08:20,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-07 02:08:21,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:22,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 2368 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:08:22,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:22,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:08:22,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:22,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:08:22,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [779907430] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:22,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:08:22,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 02:08:22,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577228122] [2021-11-07 02:08:22,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:08:22,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:22,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:08:22,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:08:22,550 INFO L87 Difference]: Start difference. First operand 5208 states and 7313 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 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 02:08:22,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:22,822 INFO L93 Difference]: Finished difference Result 5208 states and 7313 transitions. [2021-11-07 02:08:22,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:08:22,823 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 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 28 [2021-11-07 02:08:22,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:22,870 INFO L225 Difference]: With dead ends: 5208 [2021-11-07 02:08:22,870 INFO L226 Difference]: Without dead ends: 5206 [2021-11-07 02:08:22,875 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:08:22,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5206 states. [2021-11-07 02:08:23,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5206 to 5206. [2021-11-07 02:08:23,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5206 states, 4858 states have (on average 1.3678468505557844) internal successors, (6645), 4881 states have internal predecessors, (6645), 222 states have call successors, (222), 120 states have call predecessors, (222), 120 states have return successors, (444), 210 states have call predecessors, (444), 222 states have call successors, (444) [2021-11-07 02:08:23,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5206 states to 5206 states and 7311 transitions. [2021-11-07 02:08:23,339 INFO L78 Accepts]: Start accepts. Automaton has 5206 states and 7311 transitions. Word has length 28 [2021-11-07 02:08:23,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:23,342 INFO L470 AbstractCegarLoop]: Abstraction has 5206 states and 7311 transitions. [2021-11-07 02:08:23,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 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 02:08:23,343 INFO L276 IsEmpty]: Start isEmpty. Operand 5206 states and 7311 transitions. [2021-11-07 02:08:23,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 02:08:23,348 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:23,348 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 02:08:23,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:23,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:23,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:08:23,765 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION, usbtouch_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, usbtouch_openErr0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 02:08:23,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:23,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1471395912, now seen corresponding path program 1 times [2021-11-07 02:08:23,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:23,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1818782699] [2021-11-07 02:08:23,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:23,771 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:23,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:23,772 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:23,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:08:27,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:27,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 2369 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:08:27,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:27,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:27,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:28,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:28,046 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:28,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1818782699] [2021-11-07 02:08:28,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1818782699] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:28,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [916848648] [2021-11-07 02:08:28,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:28,047 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:28,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:08:28,056 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:08:28,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-07 02:08:30,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:30,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 2369 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:08:30,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:30,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:08:30,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:30,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:08:30,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [916848648] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:30,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:08:30,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 02:08:30,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065169812] [2021-11-07 02:08:30,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:08:30,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:30,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:08:30,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:08:30,524 INFO L87 Difference]: Start difference. First operand 5206 states and 7311 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 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 02:08:31,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:31,300 INFO L93 Difference]: Finished difference Result 15541 states and 22736 transitions. [2021-11-07 02:08:31,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:08:31,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 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 29 [2021-11-07 02:08:31,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:31,409 INFO L225 Difference]: With dead ends: 15541 [2021-11-07 02:08:31,410 INFO L226 Difference]: Without dead ends: 10347 [2021-11-07 02:08:31,457 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:08:31,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10347 states. [2021-11-07 02:08:32,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10347 to 10295. [2021-11-07 02:08:32,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10295 states, 9608 states have (on average 1.3692756036636136) internal successors, (13156), 9654 states have internal predecessors, (13156), 444 states have call successors, (444), 240 states have call predecessors, (444), 237 states have return successors, (1320), 412 states have call predecessors, (1320), 444 states have call successors, (1320) [2021-11-07 02:08:32,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10295 states to 10295 states and 14920 transitions. [2021-11-07 02:08:32,313 INFO L78 Accepts]: Start accepts. Automaton has 10295 states and 14920 transitions. Word has length 29 [2021-11-07 02:08:32,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:32,314 INFO L470 AbstractCegarLoop]: Abstraction has 10295 states and 14920 transitions. [2021-11-07 02:08:32,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 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 02:08:32,314 INFO L276 IsEmpty]: Start isEmpty. Operand 10295 states and 14920 transitions. [2021-11-07 02:08:32,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 02:08:32,316 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:32,316 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 02:08:32,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:32,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:32,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:32,731 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION, usbtouch_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, usbtouch_openErr0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 02:08:32,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:32,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1631366226, now seen corresponding path program 1 times [2021-11-07 02:08:32,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:32,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1142068406] [2021-11-07 02:08:32,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:32,736 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:32,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:32,739 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:32,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:08:36,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:36,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 2370 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:08:36,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:36,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:36,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:37,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:37,057 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:37,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1142068406] [2021-11-07 02:08:37,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1142068406] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:37,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1140931952] [2021-11-07 02:08:37,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:37,058 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:37,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:08:37,059 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:08:37,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-07 02:08:39,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:39,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 2370 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:08:39,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:39,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:08:39,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:39,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:08:39,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1140931952] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:39,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:08:39,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 02:08:39,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019332668] [2021-11-07 02:08:39,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:08:39,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:39,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:08:39,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:08:39,552 INFO L87 Difference]: Start difference. First operand 10295 states and 14920 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 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 02:08:40,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:40,143 INFO L93 Difference]: Finished difference Result 10295 states and 14920 transitions. [2021-11-07 02:08:40,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:08:40,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 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 30 [2021-11-07 02:08:40,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:40,222 INFO L225 Difference]: With dead ends: 10295 [2021-11-07 02:08:40,223 INFO L226 Difference]: Without dead ends: 10286 [2021-11-07 02:08:40,231 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:08:40,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10286 states. [2021-11-07 02:08:40,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10286 to 10286. [2021-11-07 02:08:40,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10286 states, 9600 states have (on average 1.3691666666666666) internal successors, (13144), 9645 states have internal predecessors, (13144), 444 states have call successors, (444), 240 states have call predecessors, (444), 237 states have return successors, (1320), 412 states have call predecessors, (1320), 444 states have call successors, (1320) [2021-11-07 02:08:41,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10286 states to 10286 states and 14908 transitions. [2021-11-07 02:08:41,058 INFO L78 Accepts]: Start accepts. Automaton has 10286 states and 14908 transitions. Word has length 30 [2021-11-07 02:08:41,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:41,059 INFO L470 AbstractCegarLoop]: Abstraction has 10286 states and 14908 transitions. [2021-11-07 02:08:41,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 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 02:08:41,059 INFO L276 IsEmpty]: Start isEmpty. Operand 10286 states and 14908 transitions. [2021-11-07 02:08:41,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 02:08:41,065 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:41,065 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:41,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:41,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:41,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:41,483 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION === [##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION, usbtouch_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, usbtouch_openErr0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 02:08:41,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:41,483 INFO L85 PathProgramCache]: Analyzing trace with hash 653119771, now seen corresponding path program 1 times [2021-11-07 02:08:41,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:41,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1563360989] [2021-11-07 02:08:41,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:41,490 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:41,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:41,491 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:41,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:08:45,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:46,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 2540 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:08:46,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:46,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:46,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:47,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:47,009 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:47,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1563360989] [2021-11-07 02:08:47,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1563360989] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:47,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1648016310] [2021-11-07 02:08:47,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:47,010 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:47,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:08:47,018 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:08:47,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-07 02:08:49,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:49,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 2540 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:08:49,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:49,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:08:49,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:49,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:08:49,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1648016310] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:49,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:08:49,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 02:08:49,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076783717] [2021-11-07 02:08:49,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:08:49,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:49,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:08:49,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:08:49,611 INFO L87 Difference]: Start difference. First operand 10286 states and 14908 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:50,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:50,860 INFO L93 Difference]: Finished difference Result 20733 states and 30053 transitions. [2021-11-07 02:08:50,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:08:50,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-07 02:08:50,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:50,931 INFO L225 Difference]: With dead ends: 20733 [2021-11-07 02:08:50,931 INFO L226 Difference]: Without dead ends: 10459 [2021-11-07 02:08:51,013 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:08:51,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10459 states. [2021-11-07 02:08:51,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10459 to 10425. [2021-11-07 02:08:51,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10425 states, 9739 states have (on average 1.370161207516172) internal successors, (13344), 9784 states have internal predecessors, (13344), 444 states have call successors, (444), 240 states have call predecessors, (444), 237 states have return successors, (1320), 412 states have call predecessors, (1320), 444 states have call successors, (1320) [2021-11-07 02:08:51,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10425 states to 10425 states and 15108 transitions. [2021-11-07 02:08:51,862 INFO L78 Accepts]: Start accepts. Automaton has 10425 states and 15108 transitions. Word has length 49 [2021-11-07 02:08:51,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:51,862 INFO L470 AbstractCegarLoop]: Abstraction has 10425 states and 15108 transitions. [2021-11-07 02:08:51,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:51,863 INFO L276 IsEmpty]: Start isEmpty. Operand 10425 states and 15108 transitions. [2021-11-07 02:08:51,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 02:08:51,874 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:51,874 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, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:51,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:52,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:52,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:52,297 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION === [##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION, usbtouch_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, usbtouch_openErr0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 02:08:52,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:52,298 INFO L85 PathProgramCache]: Analyzing trace with hash 229285172, now seen corresponding path program 1 times [2021-11-07 02:08:52,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:52,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [886775614] [2021-11-07 02:08:52,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:52,303 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:52,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:52,305 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:52,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 02:08:56,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:56,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 2596 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:08:56,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:56,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:08:56,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:57,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:08:57,279 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:57,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [886775614] [2021-11-07 02:08:57,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [886775614] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:57,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1715493887] [2021-11-07 02:08:57,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:57,280 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:57,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:08:57,281 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:08:57,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-07 02:08:59,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:59,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 2596 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:08:59,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:59,903 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:08:59,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:00,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:09:00,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1715493887] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:09:00,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:09:00,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-07 02:09:00,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194097972] [2021-11-07 02:09:00,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:09:00,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:00,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:09:00,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:09:00,244 INFO L87 Difference]: Start difference. First operand 10425 states and 15108 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:05,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:05,408 INFO L93 Difference]: Finished difference Result 40850 states and 58977 transitions. [2021-11-07 02:09:05,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:09:05,410 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 02:09:05,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:05,599 INFO L225 Difference]: With dead ends: 40850 [2021-11-07 02:09:05,600 INFO L226 Difference]: Without dead ends: 30437 [2021-11-07 02:09:05,649 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:09:05,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30437 states. [2021-11-07 02:09:07,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30437 to 30379. [2021-11-07 02:09:07,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30379 states, 28451 states have (on average 1.367192717303434) internal successors, (38898), 28580 states have internal predecessors, (38898), 1212 states have call successors, (1212), 720 states have call predecessors, (1212), 711 states have return successors, (3600), 1114 states have call predecessors, (3600), 1212 states have call successors, (3600) [2021-11-07 02:09:07,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30379 states to 30379 states and 43710 transitions. [2021-11-07 02:09:07,850 INFO L78 Accepts]: Start accepts. Automaton has 30379 states and 43710 transitions. Word has length 64 [2021-11-07 02:09:07,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:07,851 INFO L470 AbstractCegarLoop]: Abstraction has 30379 states and 43710 transitions. [2021-11-07 02:09:07,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:07,851 INFO L276 IsEmpty]: Start isEmpty. Operand 30379 states and 43710 transitions. [2021-11-07 02:09:07,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 02:09:07,863 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:07,863 INFO L513 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:09:07,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:08,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:08,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:09:08,282 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION === [##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION, usbtouch_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, usbtouch_openErr0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 02:09:08,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:08,282 INFO L85 PathProgramCache]: Analyzing trace with hash 395406806, now seen corresponding path program 1 times [2021-11-07 02:09:08,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:08,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1343160619] [2021-11-07 02:09:08,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:08,289 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:08,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:08,291 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:08,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 02:09:12,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:12,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 2698 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:09:12,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:12,922 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 02:09:12,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:13,565 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 02:09:13,565 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:13,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1343160619] [2021-11-07 02:09:13,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1343160619] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:13,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1576789522] [2021-11-07 02:09:13,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:13,566 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:09:13,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:09:13,567 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:09:13,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-07 02:09:15,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:15,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 2698 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:09:15,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:16,144 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:09:16,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:16,591 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:09:16,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1576789522] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:09:16,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:09:16,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-07 02:09:16,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545047171] [2021-11-07 02:09:16,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:09:16,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:16,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:09:16,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:09:16,592 INFO L87 Difference]: Start difference. First operand 30379 states and 43710 transitions. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 6 states have internal predecessors, (81), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 02:09:22,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:22,564 INFO L93 Difference]: Finished difference Result 81246 states and 116690 transitions. [2021-11-07 02:09:22,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 02:09:22,565 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 6 states have internal predecessors, (81), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 83 [2021-11-07 02:09:22,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:22,888 INFO L225 Difference]: With dead ends: 81246 [2021-11-07 02:09:22,888 INFO L226 Difference]: Without dead ends: 50879 [2021-11-07 02:09:23,002 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-11-07 02:09:23,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50879 states. [2021-11-07 02:09:25,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50879 to 30475. [2021-11-07 02:09:25,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30475 states, 28511 states have (on average 1.3664199782540072) internal successors, (38958), 28664 states have internal predecessors, (38958), 1212 states have call successors, (1212), 720 states have call predecessors, (1212), 747 states have return successors, (3648), 1126 states have call predecessors, (3648), 1212 states have call successors, (3648) [2021-11-07 02:09:25,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30475 states to 30475 states and 43818 transitions. [2021-11-07 02:09:25,420 INFO L78 Accepts]: Start accepts. Automaton has 30475 states and 43818 transitions. Word has length 83 [2021-11-07 02:09:25,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:25,422 INFO L470 AbstractCegarLoop]: Abstraction has 30475 states and 43818 transitions. [2021-11-07 02:09:25,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 6 states have internal predecessors, (81), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 02:09:25,422 INFO L276 IsEmpty]: Start isEmpty. Operand 30475 states and 43818 transitions. [2021-11-07 02:09:25,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-07 02:09:25,437 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:25,437 INFO L513 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:09:25,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:25,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:25,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:09:25,851 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION, usbtouch_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, usbtouch_openErr0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 02:09:25,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:25,852 INFO L85 PathProgramCache]: Analyzing trace with hash -901998558, now seen corresponding path program 1 times [2021-11-07 02:09:25,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:25,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [61344677] [2021-11-07 02:09:25,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:25,857 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:25,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:25,858 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:25,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 02:09:29,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:29,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 2699 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:09:29,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:30,028 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:09:30,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:30,550 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:09:30,550 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:30,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [61344677] [2021-11-07 02:09:30,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [61344677] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:30,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1142765485] [2021-11-07 02:09:30,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:30,552 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:09:30,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:09:30,553 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:09:30,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-07 02:09:32,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:32,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 2699 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:09:32,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:33,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:09:33,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:34,022 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:09:34,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1142765485] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:09:34,022 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:09:34,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-07 02:09:34,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626919295] [2021-11-07 02:09:34,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:09:34,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:34,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:09:34,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:09:34,024 INFO L87 Difference]: Start difference. First operand 30475 states and 43818 transitions. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 8 states have internal predecessors, (135), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 02:09:44,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:44,876 INFO L93 Difference]: Finished difference Result 82230 states and 118202 transitions. [2021-11-07 02:09:44,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 02:09:44,878 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 8 states have internal predecessors, (135), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 93 [2021-11-07 02:09:44,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:45,183 INFO L225 Difference]: With dead ends: 82230 [2021-11-07 02:09:45,183 INFO L226 Difference]: Without dead ends: 51767 [2021-11-07 02:09:45,347 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=187, Invalid=869, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 02:09:45,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51767 states. [2021-11-07 02:09:47,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51767 to 30679. [2021-11-07 02:09:47,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30679 states, 28694 states have (on average 1.3640830835714783) internal successors, (39141), 28868 states have internal predecessors, (39141), 1212 states have call successors, (1212), 720 states have call predecessors, (1212), 768 states have return successors, (3744), 1126 states have call predecessors, (3744), 1212 states have call successors, (3744) [2021-11-07 02:09:47,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30679 states to 30679 states and 44097 transitions. [2021-11-07 02:09:47,854 INFO L78 Accepts]: Start accepts. Automaton has 30679 states and 44097 transitions. Word has length 93 [2021-11-07 02:09:47,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:47,854 INFO L470 AbstractCegarLoop]: Abstraction has 30679 states and 44097 transitions. [2021-11-07 02:09:47,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 8 states have internal predecessors, (135), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 02:09:47,855 INFO L276 IsEmpty]: Start isEmpty. Operand 30679 states and 44097 transitions. [2021-11-07 02:09:47,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-07 02:09:47,864 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:47,864 INFO L513 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:09:47,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:48,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:48,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:09:48,286 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION, usbtouch_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, usbtouch_openErr0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 02:09:48,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:48,286 INFO L85 PathProgramCache]: Analyzing trace with hash -200933980, now seen corresponding path program 1 times [2021-11-07 02:09:48,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:48,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2051227110] [2021-11-07 02:09:48,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:48,291 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:48,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:48,293 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:48,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 02:09:51,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:51,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 2697 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:09:51,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:52,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:09:52,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:52,759 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:09:52,759 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:52,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2051227110] [2021-11-07 02:09:52,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2051227110] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:52,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [742131170] [2021-11-07 02:09:52,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:52,761 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:09:52,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:09:52,765 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:09:52,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 02:09:55,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:55,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 2697 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:09:55,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:55,731 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:09:55,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:56,253 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:09:56,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [742131170] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:09:56,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:09:56,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 12 [2021-11-07 02:09:56,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344721696] [2021-11-07 02:09:56,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:09:56,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:56,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:09:56,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:09:56,256 INFO L87 Difference]: Start difference. First operand 30679 states and 44097 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 02:09:58,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:58,673 INFO L93 Difference]: Finished difference Result 65639 states and 98367 transitions. [2021-11-07 02:09:58,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:09:58,674 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2021-11-07 02:09:58,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:58,835 INFO L225 Difference]: With dead ends: 65639 [2021-11-07 02:09:58,836 INFO L226 Difference]: Without dead ends: 34900 [2021-11-07 02:09:58,978 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:09:59,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34900 states. [2021-11-07 02:10:01,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34900 to 30679. [2021-11-07 02:10:01,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30679 states, 28694 states have (on average 1.362828465881369) internal successors, (39105), 28868 states have internal predecessors, (39105), 1212 states have call successors, (1212), 720 states have call predecessors, (1212), 768 states have return successors, (3744), 1126 states have call predecessors, (3744), 1212 states have call successors, (3744) [2021-11-07 02:10:01,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30679 states to 30679 states and 44061 transitions. [2021-11-07 02:10:01,278 INFO L78 Accepts]: Start accepts. Automaton has 30679 states and 44061 transitions. Word has length 93 [2021-11-07 02:10:01,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:01,279 INFO L470 AbstractCegarLoop]: Abstraction has 30679 states and 44061 transitions. [2021-11-07 02:10:01,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 02:10:01,279 INFO L276 IsEmpty]: Start isEmpty. Operand 30679 states and 44061 transitions. [2021-11-07 02:10:01,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-07 02:10:01,283 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:01,283 INFO L513 BasicCegarLoop]: trace histogram [3, 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, 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 02:10:01,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:01,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:01,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:10:01,706 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION, usbtouch_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, usbtouch_openErr0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 02:10:01,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:01,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1228190560, now seen corresponding path program 1 times [2021-11-07 02:10:01,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:01,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2140109709] [2021-11-07 02:10:01,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:01,710 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:01,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:01,711 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:01,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 02:10:05,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:05,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 2708 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:10:05,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:05,913 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:10:05,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:06,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:10:06,389 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:06,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2140109709] [2021-11-07 02:10:06,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2140109709] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:06,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [880339903] [2021-11-07 02:10:06,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:06,390 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:10:06,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:10:06,391 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:10:06,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-07 02:10:08,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:08,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 2708 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:10:08,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:09,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:10:09,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:09,709 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:10:09,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [880339903] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:09,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:10:09,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 12 [2021-11-07 02:10:09,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365182357] [2021-11-07 02:10:09,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:10:09,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:09,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:10:09,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:10:09,711 INFO L87 Difference]: Start difference. First operand 30679 states and 44061 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 02:10:11,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:11,669 INFO L93 Difference]: Finished difference Result 61562 states and 92086 transitions. [2021-11-07 02:10:11,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:10:11,672 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2021-11-07 02:10:11,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:11,769 INFO L225 Difference]: With dead ends: 61562 [2021-11-07 02:10:11,769 INFO L226 Difference]: Without dead ends: 30895 [2021-11-07 02:10:11,871 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:10:11,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30895 states. [2021-11-07 02:10:13,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30895 to 30751. [2021-11-07 02:10:13,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30751 states, 28766 states have (on average 1.3619203226030732) internal successors, (39177), 28940 states have internal predecessors, (39177), 1212 states have call successors, (1212), 720 states have call predecessors, (1212), 768 states have return successors, (3744), 1126 states have call predecessors, (3744), 1212 states have call successors, (3744) [2021-11-07 02:10:13,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30751 states to 30751 states and 44133 transitions. [2021-11-07 02:10:13,965 INFO L78 Accepts]: Start accepts. Automaton has 30751 states and 44133 transitions. Word has length 95 [2021-11-07 02:10:13,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:13,966 INFO L470 AbstractCegarLoop]: Abstraction has 30751 states and 44133 transitions. [2021-11-07 02:10:13,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 02:10:13,966 INFO L276 IsEmpty]: Start isEmpty. Operand 30751 states and 44133 transitions. [2021-11-07 02:10:13,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 02:10:13,969 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:13,969 INFO L513 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 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 02:10:14,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:14,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2021-11-07 02:10:14,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:10:14,382 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION, usbtouch_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, usbtouch_openErr0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 02:10:14,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:14,383 INFO L85 PathProgramCache]: Analyzing trace with hash 458230537, now seen corresponding path program 1 times [2021-11-07 02:10:14,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:14,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [484831605] [2021-11-07 02:10:14,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:14,386 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:14,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:14,387 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:14,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-07 02:10:17,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:17,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 2717 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:10:17,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:18,463 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:10:18,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:18,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:10:18,993 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:18,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [484831605] [2021-11-07 02:10:18,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [484831605] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:18,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1161380149] [2021-11-07 02:10:18,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:18,994 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:10:18,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:10:18,995 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:10:18,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-07 02:10:21,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:21,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 2717 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 02:10:21,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:22,475 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:10:22,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:23,447 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:10:23,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1161380149] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:23,447 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:10:23,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [5, 5] total 21 [2021-11-07 02:10:23,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720464025] [2021-11-07 02:10:23,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 02:10:23,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:23,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 02:10:23,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-11-07 02:10:23,449 INFO L87 Difference]: Start difference. First operand 30751 states and 44133 transitions. Second operand has 15 states, 15 states have (on average 7.0) internal successors, (105), 15 states have internal predecessors, (105), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 02:10:44,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:44,592 INFO L93 Difference]: Finished difference Result 73973 states and 111301 transitions. [2021-11-07 02:10:44,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 02:10:44,593 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 7.0) internal successors, (105), 15 states have internal predecessors, (105), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2021-11-07 02:10:44,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:44,742 INFO L225 Difference]: With dead ends: 73973 [2021-11-07 02:10:44,743 INFO L226 Difference]: Without dead ends: 43234 [2021-11-07 02:10:44,858 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2021-11-07 02:10:44,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43234 states. [2021-11-07 02:10:47,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43234 to 31021. [2021-11-07 02:10:47,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31021 states, 29036 states have (on average 1.3585548973687835) internal successors, (39447), 29210 states have internal predecessors, (39447), 1212 states have call successors, (1212), 720 states have call predecessors, (1212), 768 states have return successors, (3744), 1126 states have call predecessors, (3744), 1212 states have call successors, (3744) [2021-11-07 02:10:47,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31021 states to 31021 states and 44403 transitions. [2021-11-07 02:10:47,663 INFO L78 Accepts]: Start accepts. Automaton has 31021 states and 44403 transitions. Word has length 98 [2021-11-07 02:10:47,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:47,663 INFO L470 AbstractCegarLoop]: Abstraction has 31021 states and 44403 transitions. [2021-11-07 02:10:47,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.0) internal successors, (105), 15 states have internal predecessors, (105), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 02:10:47,664 INFO L276 IsEmpty]: Start isEmpty. Operand 31021 states and 44403 transitions. [2021-11-07 02:10:47,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 02:10:47,666 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:47,666 INFO L513 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 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 02:10:47,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:47,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:48,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:10:48,067 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION, usbtouch_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, usbtouch_openErr0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 02:10:48,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:48,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1081945019, now seen corresponding path program 1 times [2021-11-07 02:10:48,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:48,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1075914032] [2021-11-07 02:10:48,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:48,071 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:48,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:48,072 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:48,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-07 02:10:51,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:51,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 2728 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:10:51,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:52,337 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:10:52,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:52,892 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:10:52,892 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:52,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1075914032] [2021-11-07 02:10:52,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1075914032] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:52,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [504502157] [2021-11-07 02:10:52,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:52,893 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:10:52,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:10:52,894 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:10:52,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-07 02:10:55,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:55,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 2728 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 02:10:55,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:56,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:10:56,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:57,585 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:10:57,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [504502157] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:57,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:10:57,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 7] imperfect sequences [5, 5] total 19 [2021-11-07 02:10:57,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702688837] [2021-11-07 02:10:57,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 02:10:57,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:57,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 02:10:57,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-11-07 02:10:57,588 INFO L87 Difference]: Start difference. First operand 31021 states and 44403 transitions. Second operand has 13 states, 13 states have (on average 8.76923076923077) internal successors, (114), 13 states have internal predecessors, (114), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 02:11:14,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:14,872 INFO L93 Difference]: Finished difference Result 74063 states and 110743 transitions. [2021-11-07 02:11:14,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:11:14,880 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 8.76923076923077) internal successors, (114), 13 states have internal predecessors, (114), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2021-11-07 02:11:14,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:15,078 INFO L225 Difference]: With dead ends: 74063 [2021-11-07 02:11:15,078 INFO L226 Difference]: Without dead ends: 43054 [2021-11-07 02:11:15,201 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-11-07 02:11:15,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43054 states. [2021-11-07 02:11:17,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43054 to 31273. [2021-11-07 02:11:17,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31273 states, 29288 states have (on average 1.3566989893471728) internal successors, (39735), 29462 states have internal predecessors, (39735), 1212 states have call successors, (1212), 720 states have call predecessors, (1212), 768 states have return successors, (3744), 1126 states have call predecessors, (3744), 1212 states have call successors, (3744) [2021-11-07 02:11:17,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31273 states to 31273 states and 44691 transitions. [2021-11-07 02:11:17,720 INFO L78 Accepts]: Start accepts. Automaton has 31273 states and 44691 transitions. Word has length 100 [2021-11-07 02:11:17,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:17,720 INFO L470 AbstractCegarLoop]: Abstraction has 31273 states and 44691 transitions. [2021-11-07 02:11:17,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.76923076923077) internal successors, (114), 13 states have internal predecessors, (114), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 02:11:17,721 INFO L276 IsEmpty]: Start isEmpty. Operand 31273 states and 44691 transitions. [2021-11-07 02:11:17,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-07 02:11:17,724 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:17,724 INFO L513 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 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 02:11:17,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-11-07 02:11:17,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-07 02:11:18,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:11:18,133 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION, usbtouch_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, usbtouch_openErr0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 02:11:18,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:18,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1925580873, now seen corresponding path program 1 times [2021-11-07 02:11:18,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:11:18,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1994782795] [2021-11-07 02:11:18,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:18,138 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:11:18,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:11:18,139 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:11:18,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-07 02:11:22,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:22,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 2739 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:11:22,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:23,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:11:23,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:23,714 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:11:23,714 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:11:23,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1994782795] [2021-11-07 02:11:23,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1994782795] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:11:23,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1197974688] [2021-11-07 02:11:23,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:23,715 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:11:23,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:11:23,716 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:11:23,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-07 02:11:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:27,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 2739 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 02:11:27,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:27,611 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:11:27,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:28,104 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:11:28,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1197974688] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:28,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:11:28,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [5, 5] total 13 [2021-11-07 02:11:28,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426511160] [2021-11-07 02:11:28,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:11:28,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:11:28,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:11:28,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:11:28,107 INFO L87 Difference]: Start difference. First operand 31273 states and 44691 transitions. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 02:11:31,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:31,731 INFO L93 Difference]: Finished difference Result 70238 states and 104756 transitions. [2021-11-07 02:11:31,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:11:31,733 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-11-07 02:11:31,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:31,881 INFO L225 Difference]: With dead ends: 70238 [2021-11-07 02:11:31,881 INFO L226 Difference]: Without dead ends: 38977 [2021-11-07 02:11:31,996 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:11:32,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38977 states. [2021-11-07 02:11:34,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38977 to 31651. [2021-11-07 02:11:34,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31651 states, 29666 states have (on average 1.3551877570282478) internal successors, (40203), 29840 states have internal predecessors, (40203), 1212 states have call successors, (1212), 720 states have call predecessors, (1212), 768 states have return successors, (3744), 1126 states have call predecessors, (3744), 1212 states have call successors, (3744) [2021-11-07 02:11:34,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31651 states to 31651 states and 45159 transitions. [2021-11-07 02:11:34,739 INFO L78 Accepts]: Start accepts. Automaton has 31651 states and 45159 transitions. Word has length 102 [2021-11-07 02:11:34,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:34,739 INFO L470 AbstractCegarLoop]: Abstraction has 31651 states and 45159 transitions. [2021-11-07 02:11:34,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 02:11:34,739 INFO L276 IsEmpty]: Start isEmpty. Operand 31651 states and 45159 transitions. [2021-11-07 02:11:34,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-07 02:11:34,741 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:34,742 INFO L513 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:34,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-07 02:11:34,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-11-07 02:11:35,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:11:35,143 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION, usbtouch_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, usbtouch_openErr0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2021-11-07 02:11:35,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:35,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1222563309, now seen corresponding path program 1 times [2021-11-07 02:11:35,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:11:35,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1683463232] [2021-11-07 02:11:35,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:35,150 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:11:35,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:11:35,151 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:11:35,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-07 02:11:39,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:39,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 2750 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:11:39,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:40,373 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:11:40,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:41,134 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:11:41,134 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:11:41,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1683463232] [2021-11-07 02:11:41,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1683463232] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:11:41,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [881681] [2021-11-07 02:11:41,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:41,135 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:11:41,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:11:41,136 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:11:41,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-07 02:11:49,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:49,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 2750 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:11:49,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:50,204 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:11:50,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:50,536 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:11:50,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [881681] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:11:50,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601911257] [2021-11-07 02:11:50,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:50,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:11:50,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:11:50,538 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:11:50,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14ca0c9-bbbe-463c-a666-004de62bbbd6/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-07 02:11:55,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:55,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 2750 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 02:11:55,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:56,464 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:11:56,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:57,093 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:11:57,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601911257] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:57,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 02:11:57,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5, 5, 5] total 14 [2021-11-07 02:11:57,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126920998] [2021-11-07 02:11:57,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:11:57,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:11:57,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:11:57,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:11:57,095 INFO L87 Difference]: Start difference. First operand 31651 states and 45159 transitions. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 02:12:00,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:00,555 INFO L93 Difference]: Finished difference Result 67214 states and 99909 transitions. [2021-11-07 02:12:00,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:12:00,557 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2021-11-07 02:12:00,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:00,693 INFO L225 Difference]: With dead ends: 67214 [2021-11-07 02:12:00,693 INFO L226 Difference]: Without dead ends: 35575 [2021-11-07 02:12:00,811 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 620 GetRequests, 606 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:12:00,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35575 states.