./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs --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 8bd4d18c7774801c1dd2fcc01cd37afd9da2c99096cf08f4bd160d17156b286b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:13:58,399 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:13:58,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:13:58,431 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:13:58,431 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:13:58,433 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:13:58,435 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:13:58,437 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:13:58,439 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:13:58,441 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:13:58,442 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:13:58,443 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:13:58,444 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:13:58,445 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:13:58,447 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:13:58,449 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:13:58,450 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:13:58,451 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:13:58,454 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:13:58,456 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:13:58,458 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:13:58,460 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:13:58,462 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:13:58,463 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:13:58,467 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:13:58,468 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:13:58,468 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:13:58,469 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:13:58,470 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:13:58,471 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:13:58,476 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:13:58,477 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:13:58,478 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:13:58,479 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:13:58,481 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:13:58,482 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:13:58,484 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:13:58,484 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:13:58,484 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:13:58,485 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:13:58,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:13:58,487 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-19 14:13:58,531 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:13:58,531 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:13:58,532 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:13:58,533 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:13:58,533 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:13:58,533 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:13:58,534 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:13:58,534 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:13:58,540 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:13:58,541 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:13:58,542 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:13:58,542 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:13:58,542 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:13:58,543 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:13:58,543 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:13:58,543 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:13:58,544 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:13:58,544 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:13:58,545 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:13:58,545 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:13:58,545 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:13:58,545 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:13:58,545 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:13:58,546 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:13:58,546 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:13:58,546 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:13:58,546 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:13:58,547 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:13:58,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:13:58,547 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:13:58,547 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:13:58,548 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:13:58,548 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:13:58,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:13:58,548 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:13:58,549 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:13:58,549 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:13:58,549 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_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8bd4d18c7774801c1dd2fcc01cd37afd9da2c99096cf08f4bd160d17156b286b [2021-11-19 14:13:58,825 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:13:58,861 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:13:58,864 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:13:58,865 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:13:58,866 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:13:58,867 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-19 14:13:58,927 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/data/57aed6268/182ae9f8d0384f3282a7793c2300385e/FLAGe163ba926 [2021-11-19 14:13:59,678 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:13:59,679 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-19 14:13:59,708 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/data/57aed6268/182ae9f8d0384f3282a7793c2300385e/FLAGe163ba926 [2021-11-19 14:13:59,788 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/data/57aed6268/182ae9f8d0384f3282a7793c2300385e [2021-11-19 14:13:59,791 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:13:59,792 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:13:59,800 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:13:59,801 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:13:59,804 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:13:59,805 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:13:59" (1/1) ... [2021-11-19 14:13:59,807 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f4e028e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:13:59, skipping insertion in model container [2021-11-19 14:13:59,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:13:59" (1/1) ... [2021-11-19 14:13:59,814 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:13:59,896 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:14:00,685 WARN L230 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_6d7c58ff-a554-4801-a334-cf6b55ead05e/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i[113815,113828] [2021-11-19 14:14:00,731 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:14:00,752 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) [2021-11-19 14:14:00,753 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@386a8120 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:00, skipping insertion in model container [2021-11-19 14:14:00,753 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:14:00,754 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:14:00,756 INFO L158 Benchmark]: Toolchain (without parser) took 962.46ms. Allocated memory is still 136.3MB. Free memory was 93.2MB in the beginning and 83.5MB in the end (delta: 9.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-19 14:14:00,756 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 136.3MB. Free memory is still 115.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:14:00,757 INFO L158 Benchmark]: CACSL2BoogieTranslator took 953.30ms. Allocated memory is still 136.3MB. Free memory was 92.9MB in the beginning and 83.5MB in the end (delta: 9.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-19 14:14:00,759 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 136.3MB. Free memory is still 115.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 953.30ms. Allocated memory is still 136.3MB. Free memory was 92.9MB in the beginning and 83.5MB in the end (delta: 9.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3621]: 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_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs --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 8bd4d18c7774801c1dd2fcc01cd37afd9da2c99096cf08f4bd160d17156b286b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:14:03,161 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:14:03,165 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:14:03,216 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:14:03,217 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:14:03,222 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:14:03,225 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:14:03,230 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:14:03,234 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:14:03,244 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:14:03,246 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:14:03,248 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:14:03,249 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:14:03,252 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:14:03,254 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:14:03,260 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:14:03,262 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:14:03,264 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:14:03,266 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:14:03,277 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:14:03,279 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:14:03,281 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:14:03,284 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:14:03,286 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:14:03,290 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:14:03,291 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:14:03,291 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:14:03,293 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:14:03,298 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:14:03,299 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:14:03,299 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:14:03,300 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:14:03,302 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:14:03,303 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:14:03,305 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:14:03,305 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:14:03,306 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:14:03,307 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:14:03,307 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:14:03,309 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:14:03,310 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:14:03,311 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-19 14:14:03,354 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:14:03,354 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:14:03,355 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:14:03,356 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:14:03,356 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:14:03,356 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:14:03,356 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:14:03,357 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:14:03,357 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:14:03,357 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:14:03,360 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:14:03,360 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:14:03,360 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:14:03,361 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:14:03,361 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:14:03,361 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:14:03,361 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:14:03,362 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:14:03,362 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:14:03,362 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:14:03,362 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:14:03,363 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:14:03,363 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:14:03,363 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:14:03,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:14:03,364 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:14:03,364 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:14:03,364 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:14:03,364 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:14:03,365 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:14:03,365 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:14:03,365 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:14:03,365 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:14:03,366 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_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8bd4d18c7774801c1dd2fcc01cd37afd9da2c99096cf08f4bd160d17156b286b [2021-11-19 14:14:03,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:14:03,806 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:14:03,813 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:14:03,814 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:14:03,815 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:14:03,816 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-19 14:14:03,902 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/data/1e7710245/5c38611ccc33499a8ea75baa420dd916/FLAGad81df713 [2021-11-19 14:14:04,858 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:14:04,859 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-19 14:14:04,902 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/data/1e7710245/5c38611ccc33499a8ea75baa420dd916/FLAGad81df713 [2021-11-19 14:14:05,330 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/data/1e7710245/5c38611ccc33499a8ea75baa420dd916 [2021-11-19 14:14:05,332 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:14:05,334 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:14:05,336 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:14:05,336 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:14:05,339 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:14:05,339 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:14:05" (1/1) ... [2021-11-19 14:14:05,340 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@529bbc7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:05, skipping insertion in model container [2021-11-19 14:14:05,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:14:05" (1/1) ... [2021-11-19 14:14:05,348 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:14:05,437 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:14:06,318 WARN L230 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_6d7c58ff-a554-4801-a334-cf6b55ead05e/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i[113815,113828] [2021-11-19 14:14:06,363 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:14:06,393 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:14:06,423 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:14:06,617 WARN L230 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_6d7c58ff-a554-4801-a334-cf6b55ead05e/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i[113815,113828] [2021-11-19 14:14:06,670 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:14:06,681 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:14:06,886 WARN L230 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_6d7c58ff-a554-4801-a334-cf6b55ead05e/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i[113815,113828] [2021-11-19 14:14:06,903 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:14:06,955 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:14:06,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:06 WrapperNode [2021-11-19 14:14:06,956 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:14:06,959 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:14:06,959 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:14:06,959 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:14:06,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:06" (1/1) ... [2021-11-19 14:14:07,032 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:06" (1/1) ... [2021-11-19 14:14:07,106 INFO L137 Inliner]: procedures = 119, calls = 310, calls flagged for inlining = 49, calls inlined = 43, statements flattened = 748 [2021-11-19 14:14:07,106 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:14:07,107 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:14:07,107 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:14:07,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:14:07,117 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:06" (1/1) ... [2021-11-19 14:14:07,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:06" (1/1) ... [2021-11-19 14:14:07,127 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:06" (1/1) ... [2021-11-19 14:14:07,128 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:06" (1/1) ... [2021-11-19 14:14:07,201 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:06" (1/1) ... [2021-11-19 14:14:07,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:06" (1/1) ... [2021-11-19 14:14:07,237 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:06" (1/1) ... [2021-11-19 14:14:07,264 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:14:07,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:14:07,265 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:14:07,265 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:14:07,266 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:06" (1/1) ... [2021-11-19 14:14:07,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:14:07,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:14:07,298 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:14:07,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:14:07,354 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 14:14:07,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-19 14:14:07,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 14:14:07,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-19 14:14:07,356 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-19 14:14:07,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-19 14:14:07,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-19 14:14:07,356 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-19 14:14:07,356 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-19 14:14:07,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-19 14:14:07,357 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-19 14:14:07,357 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-19 14:14:07,357 INFO L130 BoogieDeclarations]: Found specification of procedure strlcat [2021-11-19 14:14:07,357 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcat [2021-11-19 14:14:07,358 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-19 14:14:07,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-19 14:14:07,358 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-19 14:14:07,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-19 14:14:07,359 INFO L130 BoogieDeclarations]: Found specification of procedure usb_acecad_disconnect [2021-11-19 14:14:07,359 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_acecad_disconnect [2021-11-19 14:14:07,359 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-19 14:14:07,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-19 14:14:07,359 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 14:14:07,360 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 14:14:07,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 14:14:07,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:14:07,360 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-19 14:14:07,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-19 14:14:07,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 14:14:07,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:14:07,361 INFO L130 BoogieDeclarations]: Found specification of procedure input_set_abs_params [2021-11-19 14:14:07,361 INFO L138 BoogieDeclarations]: Found implementation of procedure input_set_abs_params [2021-11-19 14:14:07,361 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2021-11-19 14:14:07,362 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2021-11-19 14:14:07,362 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_7 [2021-11-19 14:14:07,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_7 [2021-11-19 14:14:07,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 14:14:07,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-19 14:14:07,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-19 14:14:07,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 14:14:07,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 14:14:07,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 14:14:07,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-19 14:14:07,364 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-19 14:14:07,364 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-19 14:14:07,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:14:07,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-19 14:14:07,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-19 14:14:07,365 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-19 14:14:07,365 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-19 14:14:07,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:14:07,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:14:07,717 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:14:07,719 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:14:07,887 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-19 14:14:15,138 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:14:15,149 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:14:15,149 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 14:14:15,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:14:15 BoogieIcfgContainer [2021-11-19 14:14:15,152 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:14:15,154 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:14:15,154 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:14:15,157 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:14:15,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:14:05" (1/3) ... [2021-11-19 14:14:15,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b09818 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:14:15, skipping insertion in model container [2021-11-19 14:14:15,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:06" (2/3) ... [2021-11-19 14:14:15,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b09818 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:14:15, skipping insertion in model container [2021-11-19 14:14:15,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:14:15" (3/3) ... [2021-11-19 14:14:15,161 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-19 14:14:15,167 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:14:15,167 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:14:15,231 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:14:15,238 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 [2021-11-19 14:14:15,238 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:14:15,296 INFO L276 IsEmpty]: Start isEmpty. Operand has 233 states, 173 states have (on average 1.3121387283236994) internal successors, (227), 184 states have internal predecessors, (227), 43 states have call successors, (43), 16 states have call predecessors, (43), 15 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2021-11-19 14:14:15,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-19 14:14:15,304 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:15,305 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:15,305 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:15,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:15,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1664570800, now seen corresponding path program 1 times [2021-11-19 14:14:15,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:15,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769441966] [2021-11-19 14:14:15,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:15,328 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:15,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:15,335 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:15,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:14:15,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:15,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 14:14:15,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:15,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:15,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:16,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:16,007 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:16,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769441966] [2021-11-19 14:14:16,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769441966] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:16,008 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:16,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 14:14:16,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002296451] [2021-11-19 14:14:16,012 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:16,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:14:16,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:16,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:14:16,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:14:16,068 INFO L87 Difference]: Start difference. First operand has 233 states, 173 states have (on average 1.3121387283236994) internal successors, (227), 184 states have internal predecessors, (227), 43 states have call successors, (43), 16 states have call predecessors, (43), 15 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) Second operand has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 14:14:16,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:16,163 INFO L93 Difference]: Finished difference Result 461 states and 624 transitions. [2021-11-19 14:14:16,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:14:16,165 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2021-11-19 14:14:16,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:16,190 INFO L225 Difference]: With dead ends: 461 [2021-11-19 14:14:16,190 INFO L226 Difference]: Without dead ends: 222 [2021-11-19 14:14:16,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:14:16,222 INFO L933 BasicCegarLoop]: 302 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:16,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:14:16,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-11-19 14:14:16,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2021-11-19 14:14:16,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 168 states have (on average 1.2797619047619047) internal successors, (215), 173 states have internal predecessors, (215), 39 states have call successors, (39), 15 states have call predecessors, (39), 14 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-11-19 14:14:16,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 289 transitions. [2021-11-19 14:14:16,285 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 289 transitions. Word has length 32 [2021-11-19 14:14:16,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:16,286 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 289 transitions. [2021-11-19 14:14:16,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 14:14:16,286 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 289 transitions. [2021-11-19 14:14:16,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-19 14:14:16,289 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:16,289 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:16,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:16,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:16,507 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:16,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:16,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1241868974, now seen corresponding path program 1 times [2021-11-19 14:14:16,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:16,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2016615333] [2021-11-19 14:14:16,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:16,515 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:16,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:16,517 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:16,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:14:16,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:16,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:14:16,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:16,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:16,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:17,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:14:17,132 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:17,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2016615333] [2021-11-19 14:14:17,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2016615333] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:17,132 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:17,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:14:17,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294887846] [2021-11-19 14:14:17,133 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:17,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:14:17,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:17,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:14:17,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:14:17,137 INFO L87 Difference]: Start difference. First operand 222 states and 289 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 14:14:17,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:17,728 INFO L93 Difference]: Finished difference Result 814 states and 1068 transitions. [2021-11-19 14:14:17,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:14:17,731 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2021-11-19 14:14:17,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:17,743 INFO L225 Difference]: With dead ends: 814 [2021-11-19 14:14:17,743 INFO L226 Difference]: Without dead ends: 597 [2021-11-19 14:14:17,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:14:17,750 INFO L933 BasicCegarLoop]: 363 mSDtfsCounter, 518 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:17,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [518 Valid, 1029 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:14:17,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-11-19 14:14:17,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 597. [2021-11-19 14:14:17,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 453 states have (on average 1.2781456953642385) internal successors, (579), 462 states have internal predecessors, (579), 103 states have call successors, (103), 41 states have call predecessors, (103), 40 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2021-11-19 14:14:17,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 781 transitions. [2021-11-19 14:14:17,847 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 781 transitions. Word has length 32 [2021-11-19 14:14:17,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:17,847 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 781 transitions. [2021-11-19 14:14:17,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 14:14:17,848 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 781 transitions. [2021-11-19 14:14:17,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-19 14:14:17,851 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:17,852 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 14:14:17,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:18,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:18,073 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:18,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:18,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1658921169, now seen corresponding path program 1 times [2021-11-19 14:14:18,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:18,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [860972578] [2021-11-19 14:14:18,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:18,076 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:18,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:18,078 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:18,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:14:18,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:18,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:14:18,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:18,641 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 14:14:18,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:18,817 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 14:14:18,818 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:18,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [860972578] [2021-11-19 14:14:18,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [860972578] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:18,819 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:18,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-19 14:14:18,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610326670] [2021-11-19 14:14:18,820 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:18,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:14:18,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:18,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:14:18,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:14:18,824 INFO L87 Difference]: Start difference. First operand 597 states and 781 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 14:14:19,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:19,257 INFO L93 Difference]: Finished difference Result 1454 states and 1955 transitions. [2021-11-19 14:14:19,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:14:19,258 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 55 [2021-11-19 14:14:19,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:19,275 INFO L225 Difference]: With dead ends: 1454 [2021-11-19 14:14:19,275 INFO L226 Difference]: Without dead ends: 872 [2021-11-19 14:14:19,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:14:19,282 INFO L933 BasicCegarLoop]: 457 mSDtfsCounter, 623 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:19,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 1116 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:14:19,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2021-11-19 14:14:19,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 600. [2021-11-19 14:14:19,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 456 states have (on average 1.2741228070175439) internal successors, (581), 465 states have internal predecessors, (581), 103 states have call successors, (103), 41 states have call predecessors, (103), 40 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2021-11-19 14:14:19,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 783 transitions. [2021-11-19 14:14:19,397 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 783 transitions. Word has length 55 [2021-11-19 14:14:19,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:19,399 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 783 transitions. [2021-11-19 14:14:19,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 14:14:19,399 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 783 transitions. [2021-11-19 14:14:19,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-19 14:14:19,407 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:19,408 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 14:14:19,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:19,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:19,626 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:19,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:19,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1898729455, now seen corresponding path program 1 times [2021-11-19 14:14:19,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:19,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1519468893] [2021-11-19 14:14:19,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:19,628 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:19,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:19,633 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:19,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:14:19,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:19,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:14:19,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:20,234 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 14:14:20,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:20,442 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 14:14:20,442 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:20,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1519468893] [2021-11-19 14:14:20,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1519468893] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:20,442 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:20,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-19 14:14:20,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760700509] [2021-11-19 14:14:20,443 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:20,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:14:20,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:20,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:14:20,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:14:20,444 INFO L87 Difference]: Start difference. First operand 600 states and 783 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 14:14:20,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:20,582 INFO L93 Difference]: Finished difference Result 1763 states and 2311 transitions. [2021-11-19 14:14:20,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:14:20,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 55 [2021-11-19 14:14:20,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:20,599 INFO L225 Difference]: With dead ends: 1763 [2021-11-19 14:14:20,599 INFO L226 Difference]: Without dead ends: 1178 [2021-11-19 14:14:20,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:14:20,605 INFO L933 BasicCegarLoop]: 391 mSDtfsCounter, 245 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:20,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 659 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:14:20,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2021-11-19 14:14:20,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 1176. [2021-11-19 14:14:20,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 898 states have (on average 1.2683741648106903) internal successors, (1139), 913 states have internal predecessors, (1139), 199 states have call successors, (199), 79 states have call predecessors, (199), 78 states have return successors, (195), 195 states have call predecessors, (195), 195 states have call successors, (195) [2021-11-19 14:14:20,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1533 transitions. [2021-11-19 14:14:20,759 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1533 transitions. Word has length 55 [2021-11-19 14:14:20,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:20,760 INFO L470 AbstractCegarLoop]: Abstraction has 1176 states and 1533 transitions. [2021-11-19 14:14:20,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 14:14:20,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1533 transitions. [2021-11-19 14:14:20,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-19 14:14:20,764 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:20,764 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 14:14:20,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:20,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:20,965 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:20,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:20,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1268938597, now seen corresponding path program 1 times [2021-11-19 14:14:20,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:20,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1831662201] [2021-11-19 14:14:20,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:20,966 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:20,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:20,967 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:20,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:14:21,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:21,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:14:21,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:21,574 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 14:14:21,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:21,775 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 14:14:21,775 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:21,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1831662201] [2021-11-19 14:14:21,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1831662201] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:21,776 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:21,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-19 14:14:21,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861807737] [2021-11-19 14:14:21,776 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:21,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:14:21,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:21,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:14:21,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:14:21,777 INFO L87 Difference]: Start difference. First operand 1176 states and 1533 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 14:14:21,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:21,856 INFO L93 Difference]: Finished difference Result 1178 states and 1534 transitions. [2021-11-19 14:14:21,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:14:21,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 56 [2021-11-19 14:14:21,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:21,866 INFO L225 Difference]: With dead ends: 1178 [2021-11-19 14:14:21,866 INFO L226 Difference]: Without dead ends: 1175 [2021-11-19 14:14:21,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:14:21,868 INFO L933 BasicCegarLoop]: 286 mSDtfsCounter, 247 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:21,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 286 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:14:21,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-11-19 14:14:21,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 1175. [2021-11-19 14:14:21,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1175 states, 898 states have (on average 1.2672605790645879) internal successors, (1138), 912 states have internal predecessors, (1138), 198 states have call successors, (198), 79 states have call predecessors, (198), 78 states have return successors, (195), 195 states have call predecessors, (195), 195 states have call successors, (195) [2021-11-19 14:14:21,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 1531 transitions. [2021-11-19 14:14:21,988 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 1531 transitions. Word has length 56 [2021-11-19 14:14:21,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:21,989 INFO L470 AbstractCegarLoop]: Abstraction has 1175 states and 1531 transitions. [2021-11-19 14:14:21,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 14:14:21,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 1531 transitions. [2021-11-19 14:14:21,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-19 14:14:21,991 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:21,991 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 14:14:22,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:22,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:22,213 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:22,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:22,213 INFO L85 PathProgramCache]: Analyzing trace with hash 682405268, now seen corresponding path program 1 times [2021-11-19 14:14:22,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:22,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1626847377] [2021-11-19 14:14:22,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:22,214 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:22,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:22,216 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:22,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:14:22,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:22,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:14:22,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:22,842 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 14:14:22,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 14:14:23,071 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:23,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1626847377] [2021-11-19 14:14:23,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1626847377] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:23,071 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:23,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-19 14:14:23,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290810505] [2021-11-19 14:14:23,072 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:23,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:14:23,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:23,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:14:23,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:14:23,073 INFO L87 Difference]: Start difference. First operand 1175 states and 1531 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 14:14:23,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:23,153 INFO L93 Difference]: Finished difference Result 1177 states and 1532 transitions. [2021-11-19 14:14:23,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:14:23,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 57 [2021-11-19 14:14:23,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:23,162 INFO L225 Difference]: With dead ends: 1177 [2021-11-19 14:14:23,162 INFO L226 Difference]: Without dead ends: 1174 [2021-11-19 14:14:23,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:14:23,164 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 244 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:23,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 284 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:14:23,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2021-11-19 14:14:23,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 1174. [2021-11-19 14:14:23,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 898 states have (on average 1.2661469933184855) internal successors, (1137), 911 states have internal predecessors, (1137), 197 states have call successors, (197), 79 states have call predecessors, (197), 78 states have return successors, (195), 195 states have call predecessors, (195), 195 states have call successors, (195) [2021-11-19 14:14:23,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 1529 transitions. [2021-11-19 14:14:23,265 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 1529 transitions. Word has length 57 [2021-11-19 14:14:23,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:23,266 INFO L470 AbstractCegarLoop]: Abstraction has 1174 states and 1529 transitions. [2021-11-19 14:14:23,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 14:14:23,266 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 1529 transitions. [2021-11-19 14:14:23,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-19 14:14:23,268 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:23,268 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 14:14:23,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:23,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:23,482 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:23,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:23,483 INFO L85 PathProgramCache]: Analyzing trace with hash -320253880, now seen corresponding path program 1 times [2021-11-19 14:14:23,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:23,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [947553488] [2021-11-19 14:14:23,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:23,484 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:23,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:23,485 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:23,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:14:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:23,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:14:23,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:24,126 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 14:14:24,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:24,345 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 14:14:24,345 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:24,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [947553488] [2021-11-19 14:14:24,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [947553488] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:24,346 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:24,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-19 14:14:24,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750671510] [2021-11-19 14:14:24,346 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:24,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:14:24,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:24,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:14:24,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:14:24,348 INFO L87 Difference]: Start difference. First operand 1174 states and 1529 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 14:14:24,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:24,435 INFO L93 Difference]: Finished difference Result 1176 states and 1530 transitions. [2021-11-19 14:14:24,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:14:24,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 58 [2021-11-19 14:14:24,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:24,443 INFO L225 Difference]: With dead ends: 1176 [2021-11-19 14:14:24,444 INFO L226 Difference]: Without dead ends: 1165 [2021-11-19 14:14:24,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:14:24,445 INFO L933 BasicCegarLoop]: 283 mSDtfsCounter, 241 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:24,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:14:24,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-11-19 14:14:24,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1165. [2021-11-19 14:14:24,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 890 states have (on average 1.2651685393258427) internal successors, (1126), 902 states have internal predecessors, (1126), 196 states have call successors, (196), 79 states have call predecessors, (196), 78 states have return successors, (195), 195 states have call predecessors, (195), 195 states have call successors, (195) [2021-11-19 14:14:24,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 1517 transitions. [2021-11-19 14:14:24,556 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 1517 transitions. Word has length 58 [2021-11-19 14:14:24,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:24,556 INFO L470 AbstractCegarLoop]: Abstraction has 1165 states and 1517 transitions. [2021-11-19 14:14:24,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 14:14:24,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 1517 transitions. [2021-11-19 14:14:24,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-19 14:14:24,562 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:24,562 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 14:14:24,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:24,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:24,779 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:24,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:24,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1089358151, now seen corresponding path program 1 times [2021-11-19 14:14:24,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:24,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [239338374] [2021-11-19 14:14:24,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:24,781 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:24,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:24,782 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:24,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:14:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:25,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:14:25,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:25,710 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-19 14:14:25,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:26,121 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-19 14:14:26,121 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:26,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [239338374] [2021-11-19 14:14:26,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [239338374] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:26,122 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:26,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:14:26,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746036498] [2021-11-19 14:14:26,123 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:26,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:14:26,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:26,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:14:26,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:14:26,125 INFO L87 Difference]: Start difference. First operand 1165 states and 1517 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-19 14:14:26,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:26,307 INFO L93 Difference]: Finished difference Result 2405 states and 3145 transitions. [2021-11-19 14:14:26,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:14:26,308 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 152 [2021-11-19 14:14:26,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:26,317 INFO L225 Difference]: With dead ends: 2405 [2021-11-19 14:14:26,317 INFO L226 Difference]: Without dead ends: 1255 [2021-11-19 14:14:26,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:14:26,322 INFO L933 BasicCegarLoop]: 285 mSDtfsCounter, 41 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:26,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 547 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:14:26,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2021-11-19 14:14:26,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 1232. [2021-11-19 14:14:26,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 956 states have (on average 1.2751046025104602) internal successors, (1219), 968 states have internal predecessors, (1219), 196 states have call successors, (196), 80 states have call predecessors, (196), 79 states have return successors, (195), 195 states have call predecessors, (195), 195 states have call successors, (195) [2021-11-19 14:14:26,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 1610 transitions. [2021-11-19 14:14:26,462 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 1610 transitions. Word has length 152 [2021-11-19 14:14:26,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:26,463 INFO L470 AbstractCegarLoop]: Abstraction has 1232 states and 1610 transitions. [2021-11-19 14:14:26,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-19 14:14:26,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 1610 transitions. [2021-11-19 14:14:26,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-19 14:14:26,473 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:26,473 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 14:14:26,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-19 14:14:26,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:26,696 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:26,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:26,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1490878930, now seen corresponding path program 1 times [2021-11-19 14:14:26,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:26,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1729901638] [2021-11-19 14:14:26,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:26,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:26,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:26,698 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:26,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:14:27,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:27,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:14:27,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:27,752 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-19 14:14:27,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:28,346 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-19 14:14:28,346 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:28,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1729901638] [2021-11-19 14:14:28,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1729901638] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:28,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:14:28,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-19 14:14:28,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805950442] [2021-11-19 14:14:28,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:28,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:14:28,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:28,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:14:28,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:14:28,349 INFO L87 Difference]: Start difference. First operand 1232 states and 1610 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 14:14:28,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:28,558 INFO L93 Difference]: Finished difference Result 2487 states and 3285 transitions. [2021-11-19 14:14:28,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:14:28,559 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 161 [2021-11-19 14:14:28,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:28,571 INFO L225 Difference]: With dead ends: 2487 [2021-11-19 14:14:28,571 INFO L226 Difference]: Without dead ends: 1274 [2021-11-19 14:14:28,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:14:28,578 INFO L933 BasicCegarLoop]: 282 mSDtfsCounter, 1 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1118 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:28,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1118 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:14:28,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-11-19 14:14:28,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 1256. [2021-11-19 14:14:28,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 974 states have (on average 1.2700205338809034) internal successors, (1237), 986 states have internal predecessors, (1237), 196 states have call successors, (196), 80 states have call predecessors, (196), 85 states have return successors, (225), 201 states have call predecessors, (225), 195 states have call successors, (225) [2021-11-19 14:14:28,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 1658 transitions. [2021-11-19 14:14:28,712 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 1658 transitions. Word has length 161 [2021-11-19 14:14:28,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:28,713 INFO L470 AbstractCegarLoop]: Abstraction has 1256 states and 1658 transitions. [2021-11-19 14:14:28,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 14:14:28,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 1658 transitions. [2021-11-19 14:14:28,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-19 14:14:28,719 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:28,719 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2021-11-19 14:14:28,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:28,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:28,942 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:28,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:28,942 INFO L85 PathProgramCache]: Analyzing trace with hash 886339054, now seen corresponding path program 1 times [2021-11-19 14:14:28,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:28,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [568297785] [2021-11-19 14:14:28,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:28,944 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:28,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:28,946 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:28,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:14:29,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:29,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:14:29,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:29,953 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-19 14:14:29,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:30,320 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-19 14:14:30,320 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:30,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [568297785] [2021-11-19 14:14:30,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [568297785] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:30,320 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:30,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-19 14:14:30,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211410513] [2021-11-19 14:14:30,321 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:30,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:14:30,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:30,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:14:30,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:14:30,322 INFO L87 Difference]: Start difference. First operand 1256 states and 1658 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-19 14:14:30,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:30,576 INFO L93 Difference]: Finished difference Result 3270 states and 4431 transitions. [2021-11-19 14:14:30,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:14:30,577 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 167 [2021-11-19 14:14:30,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:30,593 INFO L225 Difference]: With dead ends: 3270 [2021-11-19 14:14:30,593 INFO L226 Difference]: Without dead ends: 2033 [2021-11-19 14:14:30,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:14:30,599 INFO L933 BasicCegarLoop]: 350 mSDtfsCounter, 332 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 1361 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:30,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 1361 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:14:30,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2033 states. [2021-11-19 14:14:30,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2033 to 1274. [2021-11-19 14:14:30,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1274 states, 992 states have (on average 1.2651209677419355) internal successors, (1255), 1004 states have internal predecessors, (1255), 196 states have call successors, (196), 80 states have call predecessors, (196), 85 states have return successors, (225), 201 states have call predecessors, (225), 195 states have call successors, (225) [2021-11-19 14:14:30,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 1676 transitions. [2021-11-19 14:14:30,762 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 1676 transitions. Word has length 167 [2021-11-19 14:14:30,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:30,763 INFO L470 AbstractCegarLoop]: Abstraction has 1274 states and 1676 transitions. [2021-11-19 14:14:30,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-19 14:14:30,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 1676 transitions. [2021-11-19 14:14:30,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-19 14:14:30,768 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:30,768 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:30,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:30,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:30,994 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:30,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:30,995 INFO L85 PathProgramCache]: Analyzing trace with hash -18682827, now seen corresponding path program 1 times [2021-11-19 14:14:30,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:30,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [856112005] [2021-11-19 14:14:30,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:30,996 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:30,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:30,997 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:31,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:14:31,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:31,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 14:14:31,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:32,223 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-19 14:14:32,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:33,502 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-19 14:14:33,502 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:33,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [856112005] [2021-11-19 14:14:33,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [856112005] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:33,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:14:33,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 18 [2021-11-19 14:14:33,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083199454] [2021-11-19 14:14:33,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:33,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:14:33,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:33,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:14:33,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:14:33,504 INFO L87 Difference]: Start difference. First operand 1274 states and 1676 transitions. Second operand has 10 states, 10 states have (on average 11.0) internal successors, (110), 8 states have internal predecessors, (110), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 4 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:14:35,974 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:14:37,768 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:14:37,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:37,946 INFO L93 Difference]: Finished difference Result 3291 states and 4445 transitions. [2021-11-19 14:14:37,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:14:37,948 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.0) internal successors, (110), 8 states have internal predecessors, (110), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 4 states have call predecessors, (16), 2 states have call successors, (16) Word has length 169 [2021-11-19 14:14:37,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:37,962 INFO L225 Difference]: With dead ends: 3291 [2021-11-19 14:14:37,962 INFO L226 Difference]: Without dead ends: 2036 [2021-11-19 14:14:37,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:14:37,967 INFO L933 BasicCegarLoop]: 390 mSDtfsCounter, 203 mSDsluCounter, 2994 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 3384 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:37,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 3384 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 75 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2021-11-19 14:14:37,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2021-11-19 14:14:38,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 1322. [2021-11-19 14:14:38,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 1034 states have (on average 1.2543520309477756) internal successors, (1297), 1040 states have internal predecessors, (1297), 196 states have call successors, (196), 80 states have call predecessors, (196), 91 states have return successors, (237), 213 states have call predecessors, (237), 195 states have call successors, (237) [2021-11-19 14:14:38,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 1730 transitions. [2021-11-19 14:14:38,130 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 1730 transitions. Word has length 169 [2021-11-19 14:14:38,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:38,131 INFO L470 AbstractCegarLoop]: Abstraction has 1322 states and 1730 transitions. [2021-11-19 14:14:38,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.0) internal successors, (110), 8 states have internal predecessors, (110), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 4 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:14:38,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 1730 transitions. [2021-11-19 14:14:38,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-19 14:14:38,138 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:38,138 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2021-11-19 14:14:38,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:38,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:38,354 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:38,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:38,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1318126695, now seen corresponding path program 2 times [2021-11-19 14:14:38,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:38,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [255141218] [2021-11-19 14:14:38,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:14:38,356 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:38,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:38,357 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:38,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:14:38,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-19 14:14:38,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:14:38,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:14:38,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:39,165 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-19 14:14:39,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:39,604 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-19 14:14:39,604 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:39,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [255141218] [2021-11-19 14:14:39,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [255141218] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:39,605 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:39,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-19 14:14:39,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432500530] [2021-11-19 14:14:39,605 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:39,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:14:39,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:39,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:14:39,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:14:39,607 INFO L87 Difference]: Start difference. First operand 1322 states and 1730 transitions. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 14:14:41,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:41,058 INFO L93 Difference]: Finished difference Result 2689 states and 3654 transitions. [2021-11-19 14:14:41,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:14:41,059 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), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 175 [2021-11-19 14:14:41,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:41,074 INFO L225 Difference]: With dead ends: 2689 [2021-11-19 14:14:41,074 INFO L226 Difference]: Without dead ends: 2027 [2021-11-19 14:14:41,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:14:41,078 INFO L933 BasicCegarLoop]: 422 mSDtfsCounter, 738 mSDsluCounter, 1392 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 1814 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:41,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [764 Valid, 1814 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:14:41,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2021-11-19 14:14:41,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1331. [2021-11-19 14:14:41,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1331 states, 1043 states have (on average 1.25215723873442) internal successors, (1306), 1049 states have internal predecessors, (1306), 196 states have call successors, (196), 80 states have call predecessors, (196), 91 states have return successors, (237), 213 states have call predecessors, (237), 195 states have call successors, (237) [2021-11-19 14:14:41,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 1739 transitions. [2021-11-19 14:14:41,246 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 1739 transitions. Word has length 175 [2021-11-19 14:14:41,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:41,246 INFO L470 AbstractCegarLoop]: Abstraction has 1331 states and 1739 transitions. [2021-11-19 14:14:41,247 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), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 14:14:41,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 1739 transitions. [2021-11-19 14:14:41,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-19 14:14:41,253 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:41,253 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:41,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:41,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:41,469 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:41,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:41,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1151185806, now seen corresponding path program 1 times [2021-11-19 14:14:41,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:41,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [105969612] [2021-11-19 14:14:41,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:41,470 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:41,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:41,471 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:41,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:14:42,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:42,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 940 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 14:14:42,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:43,088 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 45 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-19 14:14:43,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:44,240 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-19 14:14:44,241 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:44,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [105969612] [2021-11-19 14:14:44,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [105969612] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:14:44,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1230361454] [2021-11-19 14:14:44,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:44,242 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:14:44,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:14:44,246 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:14:44,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-19 14:14:44,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:44,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 940 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 14:14:44,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:45,211 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 45 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-19 14:14:45,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:45,925 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-19 14:14:45,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1230361454] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:14:45,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815894313] [2021-11-19 14:14:45,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:45,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:14:45,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:14:45,927 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:14:45,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-19 14:14:46,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:46,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 940 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:14:46,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:47,192 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 14:14:47,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:47,887 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-19 14:14:47,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815894313] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:14:47,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:14:47,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 4, 4] total 20 [2021-11-19 14:14:47,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471621951] [2021-11-19 14:14:47,888 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:14:47,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 14:14:47,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:47,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 14:14:47,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-11-19 14:14:47,891 INFO L87 Difference]: Start difference. First operand 1331 states and 1739 transitions. Second operand has 20 states, 20 states have (on average 17.75) internal successors, (355), 16 states have internal predecessors, (355), 6 states have call successors, (53), 3 states have call predecessors, (53), 7 states have return successors, (55), 10 states have call predecessors, (55), 6 states have call successors, (55) [2021-11-19 14:14:54,918 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:14:57,025 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:14:59,411 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:15:01,671 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:15:03,956 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:15:06,030 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:15:06,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:06,929 INFO L93 Difference]: Finished difference Result 11027 states and 14681 transitions. [2021-11-19 14:15:06,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-19 14:15:06,930 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 17.75) internal successors, (355), 16 states have internal predecessors, (355), 6 states have call successors, (53), 3 states have call predecessors, (53), 7 states have return successors, (55), 10 states have call predecessors, (55), 6 states have call successors, (55) Word has length 206 [2021-11-19 14:15:06,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:06,991 INFO L225 Difference]: With dead ends: 11027 [2021-11-19 14:15:06,991 INFO L226 Difference]: Without dead ends: 9715 [2021-11-19 14:15:06,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1274 GetRequests, 1218 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=404, Invalid=2902, Unknown=0, NotChecked=0, Total=3306 [2021-11-19 14:15:06,998 INFO L933 BasicCegarLoop]: 803 mSDtfsCounter, 1600 mSDsluCounter, 10247 mSDsCounter, 0 mSdLazyCounter, 1320 mSolverCounterSat, 240 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1615 SdHoareTripleChecker+Valid, 11050 SdHoareTripleChecker+Invalid, 1566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 1320 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:06,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1615 Valid, 11050 Invalid, 1566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 1320 Invalid, 6 Unknown, 0 Unchecked, 16.3s Time] [2021-11-19 14:15:07,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9715 states. [2021-11-19 14:15:07,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9715 to 7872. [2021-11-19 14:15:07,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7872 states, 6148 states have (on average 1.252765126870527) internal successors, (7702), 6196 states have internal predecessors, (7702), 1192 states have call successors, (1192), 460 states have call predecessors, (1192), 531 states have return successors, (1479), 1287 states have call predecessors, (1479), 1191 states have call successors, (1479) [2021-11-19 14:15:07,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7872 states to 7872 states and 10373 transitions. [2021-11-19 14:15:07,873 INFO L78 Accepts]: Start accepts. Automaton has 7872 states and 10373 transitions. Word has length 206 [2021-11-19 14:15:07,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:07,874 INFO L470 AbstractCegarLoop]: Abstraction has 7872 states and 10373 transitions. [2021-11-19 14:15:07,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 17.75) internal successors, (355), 16 states have internal predecessors, (355), 6 states have call successors, (53), 3 states have call predecessors, (53), 7 states have return successors, (55), 10 states have call predecessors, (55), 6 states have call successors, (55) [2021-11-19 14:15:07,875 INFO L276 IsEmpty]: Start isEmpty. Operand 7872 states and 10373 transitions. [2021-11-19 14:15:07,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-19 14:15:07,893 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:07,893 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:07,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:08,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:08,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:08,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:08,510 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:08,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:08,511 INFO L85 PathProgramCache]: Analyzing trace with hash -512829008, now seen corresponding path program 1 times [2021-11-19 14:15:08,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:08,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1678848107] [2021-11-19 14:15:08,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:08,512 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:08,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:08,514 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:08,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 14:15:09,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:09,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 953 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 14:15:09,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:09,847 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-19 14:15:09,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:10,410 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-19 14:15:10,410 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:10,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1678848107] [2021-11-19 14:15:10,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1678848107] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:15:10,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:15:10,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-19 14:15:10,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530214782] [2021-11-19 14:15:10,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:10,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:15:10,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:10,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:15:10,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:15:10,412 INFO L87 Difference]: Start difference. First operand 7872 states and 10373 transitions. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 5 states have internal predecessors, (129), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 14:15:11,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:11,215 INFO L93 Difference]: Finished difference Result 18938 states and 25506 transitions. [2021-11-19 14:15:11,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:15:11,217 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 5 states have internal predecessors, (129), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 212 [2021-11-19 14:15:11,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:11,268 INFO L225 Difference]: With dead ends: 18938 [2021-11-19 14:15:11,268 INFO L226 Difference]: Without dead ends: 11085 [2021-11-19 14:15:11,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:15:11,288 INFO L933 BasicCegarLoop]: 394 mSDtfsCounter, 92 mSDsluCounter, 1465 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 1859 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:11,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 1859 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:15:11,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11085 states. [2021-11-19 14:15:12,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11085 to 7980. [2021-11-19 14:15:12,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7980 states, 6256 states have (on average 1.2484015345268542) internal successors, (7810), 6268 states have internal predecessors, (7810), 1192 states have call successors, (1192), 460 states have call predecessors, (1192), 531 states have return successors, (1479), 1323 states have call predecessors, (1479), 1191 states have call successors, (1479) [2021-11-19 14:15:12,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7980 states to 7980 states and 10481 transitions. [2021-11-19 14:15:12,155 INFO L78 Accepts]: Start accepts. Automaton has 7980 states and 10481 transitions. Word has length 212 [2021-11-19 14:15:12,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:12,156 INFO L470 AbstractCegarLoop]: Abstraction has 7980 states and 10481 transitions. [2021-11-19 14:15:12,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 5 states have internal predecessors, (129), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 14:15:12,157 INFO L276 IsEmpty]: Start isEmpty. Operand 7980 states and 10481 transitions. [2021-11-19 14:15:12,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-19 14:15:12,176 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:12,177 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:12,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:12,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:12,390 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:12,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:12,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1946076244, now seen corresponding path program 2 times [2021-11-19 14:15:12,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:12,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [94444289] [2021-11-19 14:15:12,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:15:12,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:12,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:12,394 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:12,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 14:15:12,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-19 14:15:12,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:15:12,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:15:12,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:13,026 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-11-19 14:15:13,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:13,360 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-11-19 14:15:13,360 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:13,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [94444289] [2021-11-19 14:15:13,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [94444289] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:13,361 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:13,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-19 14:15:13,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202358669] [2021-11-19 14:15:13,362 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:13,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:15:13,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:13,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:15:13,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:15:13,363 INFO L87 Difference]: Start difference. First operand 7980 states and 10481 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2021-11-19 14:15:14,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:14,514 INFO L93 Difference]: Finished difference Result 25243 states and 33340 transitions. [2021-11-19 14:15:14,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:15:14,515 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 218 [2021-11-19 14:15:14,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:14,576 INFO L225 Difference]: With dead ends: 25243 [2021-11-19 14:15:14,576 INFO L226 Difference]: Without dead ends: 17282 [2021-11-19 14:15:14,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:15:14,601 INFO L933 BasicCegarLoop]: 367 mSDtfsCounter, 336 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:14,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 957 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:15:14,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17282 states. [2021-11-19 14:15:15,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17282 to 8016. [2021-11-19 14:15:15,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8016 states, 6292 states have (on average 1.2469802924348379) internal successors, (7846), 6316 states have internal predecessors, (7846), 1192 states have call successors, (1192), 460 states have call predecessors, (1192), 531 states have return successors, (1479), 1311 states have call predecessors, (1479), 1191 states have call successors, (1479) [2021-11-19 14:15:15,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8016 states to 8016 states and 10517 transitions. [2021-11-19 14:15:15,661 INFO L78 Accepts]: Start accepts. Automaton has 8016 states and 10517 transitions. Word has length 218 [2021-11-19 14:15:15,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:15,662 INFO L470 AbstractCegarLoop]: Abstraction has 8016 states and 10517 transitions. [2021-11-19 14:15:15,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2021-11-19 14:15:15,662 INFO L276 IsEmpty]: Start isEmpty. Operand 8016 states and 10517 transitions. [2021-11-19 14:15:15,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-11-19 14:15:15,691 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:15,692 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:15,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:15,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:15,908 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:15,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:15,908 INFO L85 PathProgramCache]: Analyzing trace with hash -61991976, now seen corresponding path program 1 times [2021-11-19 14:15:15,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:15,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1425148673] [2021-11-19 14:15:15,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:15,910 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:15,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:15,911 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:15,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 14:15:16,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:16,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 14:15:16,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:17,127 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-19 14:15:17,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:17,720 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-19 14:15:17,720 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:17,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1425148673] [2021-11-19 14:15:17,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1425148673] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:15:17,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:15:17,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-19 14:15:17,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292354645] [2021-11-19 14:15:17,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:17,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:15:17,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:17,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:15:17,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:15:17,723 INFO L87 Difference]: Start difference. First operand 8016 states and 10517 transitions. Second operand has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-19 14:15:18,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:18,935 INFO L93 Difference]: Finished difference Result 17690 states and 24174 transitions. [2021-11-19 14:15:18,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:15:18,936 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 225 [2021-11-19 14:15:18,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:18,990 INFO L225 Difference]: With dead ends: 17690 [2021-11-19 14:15:18,991 INFO L226 Difference]: Without dead ends: 13641 [2021-11-19 14:15:19,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:15:19,006 INFO L933 BasicCegarLoop]: 430 mSDtfsCounter, 303 mSDsluCounter, 1444 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 1874 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:19,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 1874 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:15:19,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13641 states. [2021-11-19 14:15:20,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13641 to 8124. [2021-11-19 14:15:20,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8124 states, 6400 states have (on average 1.2428125) internal successors, (7954), 6388 states have internal predecessors, (7954), 1192 states have call successors, (1192), 460 states have call predecessors, (1192), 531 states have return successors, (1479), 1347 states have call predecessors, (1479), 1191 states have call successors, (1479) [2021-11-19 14:15:20,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8124 states to 8124 states and 10625 transitions. [2021-11-19 14:15:20,098 INFO L78 Accepts]: Start accepts. Automaton has 8124 states and 10625 transitions. Word has length 225 [2021-11-19 14:15:20,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:20,099 INFO L470 AbstractCegarLoop]: Abstraction has 8124 states and 10625 transitions. [2021-11-19 14:15:20,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-19 14:15:20,100 INFO L276 IsEmpty]: Start isEmpty. Operand 8124 states and 10625 transitions. [2021-11-19 14:15:20,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-11-19 14:15:20,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:20,123 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:20,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:20,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:20,338 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:20,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:20,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1402819212, now seen corresponding path program 2 times [2021-11-19 14:15:20,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:20,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [530643492] [2021-11-19 14:15:20,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:15:20,341 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:20,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:20,342 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:20,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:15:23,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:15:23,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:15:23,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:15:23,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:24,493 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-11-19 14:15:24,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:25,008 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-11-19 14:15:25,009 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:25,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [530643492] [2021-11-19 14:15:25,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [530643492] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:25,009 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:25,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:15:25,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339636545] [2021-11-19 14:15:25,009 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:25,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:15:25,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:25,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:15:25,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:15:25,011 INFO L87 Difference]: Start difference. First operand 8124 states and 10625 transitions. Second operand has 6 states, 6 states have (on average 28.333333333333332) internal successors, (170), 6 states have internal predecessors, (170), 4 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-19 14:15:26,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:26,525 INFO L93 Difference]: Finished difference Result 24842 states and 33750 transitions. [2021-11-19 14:15:26,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:15:26,525 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.333333333333332) internal successors, (170), 6 states have internal predecessors, (170), 4 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) Word has length 231 [2021-11-19 14:15:26,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:26,584 INFO L225 Difference]: With dead ends: 24842 [2021-11-19 14:15:26,585 INFO L226 Difference]: Without dead ends: 16737 [2021-11-19 14:15:26,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 457 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:15:26,613 INFO L933 BasicCegarLoop]: 428 mSDtfsCounter, 550 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 1564 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:26,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 1564 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:15:26,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16737 states. [2021-11-19 14:15:27,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16737 to 10158. [2021-11-19 14:15:27,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10158 states, 7966 states have (on average 1.2493095656540296) internal successors, (9952), 7918 states have internal predecessors, (9952), 1660 states have call successors, (1660), 460 states have call predecessors, (1660), 531 states have return successors, (2091), 1851 states have call predecessors, (2091), 1659 states have call successors, (2091) [2021-11-19 14:15:27,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10158 states to 10158 states and 13703 transitions. [2021-11-19 14:15:27,996 INFO L78 Accepts]: Start accepts. Automaton has 10158 states and 13703 transitions. Word has length 231 [2021-11-19 14:15:27,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:27,997 INFO L470 AbstractCegarLoop]: Abstraction has 10158 states and 13703 transitions. [2021-11-19 14:15:27,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.333333333333332) internal successors, (170), 6 states have internal predecessors, (170), 4 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-19 14:15:27,998 INFO L276 IsEmpty]: Start isEmpty. Operand 10158 states and 13703 transitions. [2021-11-19 14:15:28,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-11-19 14:15:28,024 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:28,024 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:28,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:28,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:28,238 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:28,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:28,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1755907594, now seen corresponding path program 1 times [2021-11-19 14:15:28,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:28,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [960063850] [2021-11-19 14:15:28,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:28,241 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:28,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:28,242 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:28,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 14:15:29,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:29,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:15:29,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:29,820 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-19 14:15:29,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:30,349 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-19 14:15:30,349 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:30,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [960063850] [2021-11-19 14:15:30,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [960063850] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:30,350 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:30,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-19 14:15:30,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566406887] [2021-11-19 14:15:30,350 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:30,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:15:30,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:30,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:15:30,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:15:30,352 INFO L87 Difference]: Start difference. First operand 10158 states and 13703 transitions. Second operand has 8 states, 8 states have (on average 17.625) internal successors, (141), 6 states have internal predecessors, (141), 2 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-19 14:15:31,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:31,260 INFO L93 Difference]: Finished difference Result 20369 states and 27459 transitions. [2021-11-19 14:15:31,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:15:31,261 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 6 states have internal predecessors, (141), 2 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) Word has length 231 [2021-11-19 14:15:31,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:31,294 INFO L225 Difference]: With dead ends: 20369 [2021-11-19 14:15:31,295 INFO L226 Difference]: Without dead ends: 10158 [2021-11-19 14:15:31,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:15:31,323 INFO L933 BasicCegarLoop]: 279 mSDtfsCounter, 0 mSDsluCounter, 1385 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1664 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:31,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1664 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:15:31,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10158 states. [2021-11-19 14:15:32,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10158 to 10158. [2021-11-19 14:15:32,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10158 states, 7966 states have (on average 1.2493095656540296) internal successors, (9952), 7918 states have internal predecessors, (9952), 1660 states have call successors, (1660), 460 states have call predecessors, (1660), 531 states have return successors, (2055), 1851 states have call predecessors, (2055), 1659 states have call successors, (2055) [2021-11-19 14:15:32,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10158 states to 10158 states and 13667 transitions. [2021-11-19 14:15:32,557 INFO L78 Accepts]: Start accepts. Automaton has 10158 states and 13667 transitions. Word has length 231 [2021-11-19 14:15:32,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:32,559 INFO L470 AbstractCegarLoop]: Abstraction has 10158 states and 13667 transitions. [2021-11-19 14:15:32,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 6 states have internal predecessors, (141), 2 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-19 14:15:32,560 INFO L276 IsEmpty]: Start isEmpty. Operand 10158 states and 13667 transitions. [2021-11-19 14:15:32,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-11-19 14:15:32,594 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:32,594 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:32,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:32,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:32,810 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:32,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:32,811 INFO L85 PathProgramCache]: Analyzing trace with hash -2040231342, now seen corresponding path program 1 times [2021-11-19 14:15:32,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:32,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1469063228] [2021-11-19 14:15:32,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:32,812 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:32,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:32,813 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:32,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d7c58ff-a554-4801-a334-cf6b55ead05e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 14:15:36,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:36,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-19 14:15:36,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:36,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 14:15:36,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-11-19 14:15:37,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2021-11-19 14:15:39,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2021-11-19 14:15:39,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 16 [2021-11-19 14:15:39,806 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-19 14:15:39,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 46 [2021-11-19 14:15:39,839 INFO L354 Elim1Store]: treesize reduction 16, result has 23.8 percent of original size [2021-11-19 14:15:39,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2021-11-19 14:15:40,782 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-19 14:15:40,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 39 [2021-11-19 14:15:51,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 14:17:42,256 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-11-19 14:17:42,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 56 [2021-11-19 14:17:44,807 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-19 14:17:44,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 39 [2021-11-19 14:17:49,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-19 14:19:45,369 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-11-19 14:19:45,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 62 treesize of output 79 [2021-11-19 14:19:46,273 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-19 14:19:46,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 72 [2021-11-19 14:19:52,809 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_usb_acecad_probe_~id#1.base_BEFORE_CALL_1| (_ BitVec 64)) (|ldv_init_zalloc_#t~malloc65.base| (_ BitVec 64))) (let ((.cse0 ((as const (Array (_ BitVec 64) (_ BitVec 8))) (_ bv0 8)))) (and (not (= |ldv_init_zalloc_#t~malloc65.base| |v_ULTIMATE.start_usb_acecad_probe_~id#1.base_BEFORE_CALL_1|)) (= (select |c_#memory_int| |ldv_init_zalloc_#t~malloc65.base|) .cse0) (= (select |c_#memory_int| |v_ULTIMATE.start_usb_acecad_probe_~id#1.base_BEFORE_CALL_1|) .cse0)))) is different from true [2021-11-19 14:20:04,078 INFO L354 Elim1Store]: treesize reduction 28, result has 31.7 percent of original size [2021-11-19 14:20:04,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 87 treesize of output 91 [2021-11-19 14:20:19,424 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ldv_init_zalloc_#t~malloc65.base| (_ BitVec 64)) (|v_ULTIMATE.start_usb_acecad_probe_~id#1.base_BEFORE_CALL_6| (_ BitVec 64))) (let ((.cse0 ((as const (Array (_ BitVec 64) (_ BitVec 8))) (_ bv0 8)))) (and (= .cse0 (select |c_#memory_int| |v_ULTIMATE.start_usb_acecad_probe_~id#1.base_BEFORE_CALL_6|)) (not (= |ldv_init_zalloc_#t~malloc65.base| |v_ULTIMATE.start_usb_acecad_probe_~id#1.base_BEFORE_CALL_6|)) (= (select |c_#memory_int| |ldv_init_zalloc_#t~malloc65.base|) .cse0)))) is different from true [2021-11-19 14:20:20,452 INFO L354 Elim1Store]: treesize reduction 42, result has 10.6 percent of original size [2021-11-19 14:20:20,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 47 [2021-11-19 14:20:20,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2021-11-19 14:20:22,664 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_usb_acecad_probe_~id#1.base_BEFORE_CALL_7| (_ BitVec 64)) (|ldv_init_zalloc_#t~malloc65.base| (_ BitVec 64))) (let ((.cse0 ((as const (Array (_ BitVec 64) (_ BitVec 8))) (_ bv0 8)))) (and (= .cse0 (select |c_#memory_int| |v_ULTIMATE.start_usb_acecad_probe_~id#1.base_BEFORE_CALL_7|)) (not (= |ldv_init_zalloc_#t~malloc65.base| |v_ULTIMATE.start_usb_acecad_probe_~id#1.base_BEFORE_CALL_7|)) (= (select |c_#memory_int| |ldv_init_zalloc_#t~malloc65.base|) .cse0)))) is different from true [2021-11-19 14:20:25,785 INFO L354 Elim1Store]: treesize reduction 42, result has 10.6 percent of original size [2021-11-19 14:20:25,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 47 [2021-11-19 14:20:25,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2021-11-19 14:20:25,869 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:20:25,871 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-19 14:20:25,954 INFO L354 Elim1Store]: treesize reduction 84, result has 11.6 percent of original size [2021-11-19 14:20:25,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 57 treesize of output 60 [2021-11-19 14:20:26,003 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-19 14:20:26,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 42 [2021-11-19 14:20:30,559 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_usb_acecad_probe_~id#1.base_BEFORE_CALL_8| (_ BitVec 64)) (|ldv_init_zalloc_#t~malloc65.base| (_ BitVec 64))) (let ((.cse0 ((as const (Array (_ BitVec 64) (_ BitVec 8))) (_ bv0 8)))) (and (= (select |c_#memory_int| |v_ULTIMATE.start_usb_acecad_probe_~id#1.base_BEFORE_CALL_8|) .cse0) (= (select |c_#memory_int| |ldv_init_zalloc_#t~malloc65.base|) .cse0) (not (= |ldv_init_zalloc_#t~malloc65.base| |v_ULTIMATE.start_usb_acecad_probe_~id#1.base_BEFORE_CALL_8|))))) is different from true [2021-11-19 14:20:34,989 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:20:34,990 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3779 [2021-11-19 14:20:34,995 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:20:34,996 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4139