./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 83293f5c81ac30df7449dd9c03263a4edbba62be916a9a4fda92d2518792b8d4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:06:08,362 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:06:08,365 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:06:08,421 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:06:08,422 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:06:08,427 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:06:08,429 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:06:08,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:06:08,437 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:06:08,442 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:06:08,444 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:06:08,446 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:06:08,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:06:08,449 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:06:08,452 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:06:08,456 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:06:08,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:06:08,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:06:08,462 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:06:08,471 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:06:08,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:06:08,475 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:06:08,479 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:06:08,480 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:06:08,490 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:06:08,491 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:06:08,491 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:06:08,493 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:06:08,494 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:06:08,496 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:06:08,496 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:06:08,497 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:06:08,500 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:06:08,501 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:06:08,503 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:06:08,503 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:06:08,504 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:06:08,504 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:06:08,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:06:08,506 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:06:08,507 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:06:08,508 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 02:06:08,557 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:06:08,558 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:06:08,559 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:06:08,560 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:06:08,560 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:06:08,560 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:06:08,561 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:06:08,561 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:06:08,569 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:06:08,569 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:06:08,571 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:06:08,571 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:06:08,572 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:06:08,572 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:06:08,572 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:06:08,573 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:06:08,573 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:06:08,574 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:06:08,574 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:06:08,574 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:06:08,575 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:06:08,575 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:06:08,575 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:06:08,575 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:06:08,576 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:06:08,576 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:06:08,576 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:06:08,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:06:08,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:06:08,579 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:06:08,579 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:06:08,580 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:06:08,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:06:08,580 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:06:08,581 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:06:08,581 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:06:08,581 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_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83293f5c81ac30df7449dd9c03263a4edbba62be916a9a4fda92d2518792b8d4 [2021-11-07 02:06:08,963 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:06:09,009 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:06:09,012 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:06:09,016 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:06:09,017 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:06:09,018 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i [2021-11-07 02:06:09,105 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/data/ffe92f5de/ff3284a6199948ac9ebcd57097c2a7fd/FLAG096474b13 [2021-11-07 02:06:10,282 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:06:10,283 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i [2021-11-07 02:06:10,342 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/data/ffe92f5de/ff3284a6199948ac9ebcd57097c2a7fd/FLAG096474b13 [2021-11-07 02:06:10,627 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/data/ffe92f5de/ff3284a6199948ac9ebcd57097c2a7fd [2021-11-07 02:06:10,629 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:06:10,630 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:06:10,632 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:06:10,632 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:06:10,636 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:06:10,637 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:06:10" (1/1) ... [2021-11-07 02:06:10,638 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b1e1e0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:10, skipping insertion in model container [2021-11-07 02:06:10,638 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:06:10" (1/1) ... [2021-11-07 02:06:10,646 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:06:10,744 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:06:11,863 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i[163669,163682] [2021-11-07 02:06:12,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:06:12,552 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 02:06:12,553 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@15e5e90b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:12, skipping insertion in model container [2021-11-07 02:06:12,553 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:06:12,553 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:06:12,559 INFO L168 Benchmark]: Toolchain (without parser) took 1924.18 ms. Allocated memory was 98.6 MB in the beginning and 140.5 MB in the end (delta: 41.9 MB). Free memory was 69.7 MB in the beginning and 88.6 MB in the end (delta: -18.9 MB). Peak memory consumption was 40.9 MB. Max. memory is 16.1 GB. [2021-11-07 02:06:12,559 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 98.6 MB. Free memory is still 74.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:06:12,560 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1921.45 ms. Allocated memory was 98.6 MB in the beginning and 140.5 MB in the end (delta: 41.9 MB). Free memory was 69.4 MB in the beginning and 88.6 MB in the end (delta: -19.2 MB). Peak memory consumption was 40.9 MB. Max. memory is 16.1 GB. [2021-11-07 02:06:12,561 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 98.6 MB. Free memory is still 74.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1921.45 ms. Allocated memory was 98.6 MB in the beginning and 140.5 MB in the end (delta: 41.9 MB). Free memory was 69.4 MB in the beginning and 88.6 MB in the end (delta: -19.2 MB). Peak memory consumption was 40.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 5815]: 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_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 83293f5c81ac30df7449dd9c03263a4edbba62be916a9a4fda92d2518792b8d4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:06:15,451 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:06:15,453 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:06:15,502 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:06:15,503 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:06:15,508 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:06:15,511 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:06:15,521 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:06:15,527 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:06:15,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:06:15,533 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:06:15,534 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:06:15,535 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:06:15,537 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:06:15,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:06:15,541 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:06:15,542 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:06:15,544 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:06:15,546 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:06:15,549 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:06:15,552 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:06:15,555 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:06:15,557 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:06:15,558 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:06:15,563 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:06:15,563 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:06:15,564 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:06:15,565 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:06:15,566 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:06:15,568 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:06:15,568 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:06:15,569 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:06:15,571 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:06:15,572 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:06:15,573 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:06:15,574 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:06:15,575 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:06:15,576 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:06:15,576 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:06:15,578 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:06:15,579 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:06:15,584 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 02:06:15,619 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:06:15,620 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:06:15,621 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:06:15,621 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:06:15,621 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:06:15,622 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:06:15,622 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:06:15,622 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:06:15,623 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:06:15,624 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:06:15,624 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:06:15,624 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:06:15,625 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:06:15,625 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:06:15,625 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:06:15,625 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:06:15,626 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:06:15,626 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:06:15,626 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:06:15,626 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:06:15,635 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:06:15,636 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:06:15,636 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:06:15,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:06:15,640 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:06:15,640 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:06:15,640 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:06:15,641 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:06:15,642 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:06:15,642 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:06:15,642 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:06:15,642 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:06:15,643 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_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83293f5c81ac30df7449dd9c03263a4edbba62be916a9a4fda92d2518792b8d4 [2021-11-07 02:06:16,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:06:16,220 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:06:16,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:06:16,225 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:06:16,227 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:06:16,228 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i [2021-11-07 02:06:16,335 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/data/945fbdb28/75c82c290ad4426c95b8ed346a405691/FLAG10fe33727 [2021-11-07 02:06:17,587 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:06:17,589 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i [2021-11-07 02:06:17,643 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/data/945fbdb28/75c82c290ad4426c95b8ed346a405691/FLAG10fe33727 [2021-11-07 02:06:17,882 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/data/945fbdb28/75c82c290ad4426c95b8ed346a405691 [2021-11-07 02:06:17,885 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:06:17,887 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:06:17,889 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:06:17,889 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:06:17,893 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:06:17,894 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:06:17" (1/1) ... [2021-11-07 02:06:17,896 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6eeb5329 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:17, skipping insertion in model container [2021-11-07 02:06:17,896 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:06:17" (1/1) ... [2021-11-07 02:06:17,906 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:06:18,124 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:06:19,377 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i[163669,163682] [2021-11-07 02:06:20,017 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:06:20,081 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:06:20,142 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:06:20,328 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i[163669,163682] [2021-11-07 02:06:20,511 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:06:20,544 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:06:20,833 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i[163669,163682] [2021-11-07 02:06:21,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:06:21,101 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:06:21,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:21 WrapperNode [2021-11-07 02:06:21,102 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:06:21,104 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:06:21,104 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:06:21,104 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:06:21,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:21" (1/1) ... [2021-11-07 02:06:21,216 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:21" (1/1) ... [2021-11-07 02:06:21,422 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:06:21,432 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:06:21,432 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:06:21,433 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:06:21,443 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:21" (1/1) ... [2021-11-07 02:06:21,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:21" (1/1) ... [2021-11-07 02:06:21,488 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:21" (1/1) ... [2021-11-07 02:06:21,489 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:21" (1/1) ... [2021-11-07 02:06:21,721 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:21" (1/1) ... [2021-11-07 02:06:21,768 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:21" (1/1) ... [2021-11-07 02:06:21,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:21" (1/1) ... [2021-11-07 02:06:21,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:06:21,836 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:06:21,837 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:06:21,837 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:06:21,838 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:21" (1/1) ... [2021-11-07 02:06:21,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:06:21,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:06:21,897 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:06:21,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:06:22,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 02:06:22,012 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_3 [2021-11-07 02:06:22,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_3 [2021-11-07 02:06:22,013 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 02:06:22,013 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 02:06:22,013 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 02:06:22,013 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-07 02:06:22,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 02:06:22,014 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2021-11-07 02:06:22,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2021-11-07 02:06:22,014 INFO L130 BoogieDeclarations]: Found specification of procedure usb_8dev_read_bulk_callback [2021-11-07 02:06:22,015 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_8dev_read_bulk_callback [2021-11-07 02:06:22,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-07 02:06:22,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-07 02:06:22,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-07 02:06:22,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-07 02:06:22,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 02:06:22,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 02:06:22,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:06:22,016 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-07 02:06:22,017 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-07 02:06:22,017 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-07 02:06:22,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-07 02:06:22,017 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-07 02:06:22,018 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 02:06:22,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-07 02:06:22,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 02:06:22,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-07 02:06:22,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 02:06:22,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 02:06:22,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 02:06:22,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:06:22,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 02:06:22,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-07 02:06:22,020 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-07 02:06:22,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:06:22,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:07:29,962 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:07:29,962 INFO L299 CfgBuilder]: Removed 561 assume(true) statements. [2021-11-07 02:07:29,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:07:29 BoogieIcfgContainer [2021-11-07 02:07:29,967 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:07:29,970 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:07:29,970 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:07:29,973 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:07:29,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:06:17" (1/3) ... [2021-11-07 02:07:29,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28ad2b21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:07:29, skipping insertion in model container [2021-11-07 02:07:29,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:21" (2/3) ... [2021-11-07 02:07:29,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28ad2b21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:07:29, skipping insertion in model container [2021-11-07 02:07:29,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:07:29" (3/3) ... [2021-11-07 02:07:29,978 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i [2021-11-07 02:07:29,985 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:07:29,985 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 02:07:30,046 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:07:30,052 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 02:07:30,052 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 02:07:30,085 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 573 states have (on average 1.4328097731239093) internal successors, (821), 579 states have internal predecessors, (821), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-07 02:07:30,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 02:07:30,094 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:30,095 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:30,096 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:07:30,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:30,106 INFO L85 PathProgramCache]: Analyzing trace with hash 812919680, now seen corresponding path program 1 times [2021-11-07 02:07:30,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:30,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2045601260] [2021-11-07 02:07:30,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:30,122 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:30,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:30,125 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:30,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:07:31,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:31,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:31,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:31,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:31,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:31,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:31,481 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:31,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2045601260] [2021-11-07 02:07:31,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2045601260] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:31,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:31,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:07:31,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549412477] [2021-11-07 02:07:31,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:07:31,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:31,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:07:31,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:07:31,510 INFO L87 Difference]: Start difference. First operand has 590 states, 573 states have (on average 1.4328097731239093) internal successors, (821), 579 states have internal predecessors, (821), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:34,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:34,220 INFO L93 Difference]: Finished difference Result 2256 states and 3228 transitions. [2021-11-07 02:07:34,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:07:34,223 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 02:07:34,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:34,266 INFO L225 Difference]: With dead ends: 2256 [2021-11-07 02:07:34,267 INFO L226 Difference]: Without dead ends: 1646 [2021-11-07 02:07:34,280 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:07:34,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2021-11-07 02:07:34,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1646. [2021-11-07 02:07:34,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1646 states, 1608 states have (on average 1.3998756218905473) internal successors, (2251), 1615 states have internal predecessors, (2251), 21 states have call successors, (21), 12 states have call predecessors, (21), 12 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-07 02:07:34,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 2293 transitions. [2021-11-07 02:07:34,545 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 2293 transitions. Word has length 17 [2021-11-07 02:07:34,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:34,546 INFO L470 AbstractCegarLoop]: Abstraction has 1646 states and 2293 transitions. [2021-11-07 02:07:34,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:34,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 2293 transitions. [2021-11-07 02:07:34,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 02:07:34,552 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:34,552 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:34,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:34,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:34,767 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:07:34,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:34,768 INFO L85 PathProgramCache]: Analyzing trace with hash 366683969, now seen corresponding path program 1 times [2021-11-07 02:07:34,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:34,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [300300749] [2021-11-07 02:07:34,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:34,771 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:34,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:34,773 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:34,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:07:35,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:35,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:07:35,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:36,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:36,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:36,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:36,831 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:36,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [300300749] [2021-11-07 02:07:36,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [300300749] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:36,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:36,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 02:07:36,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885387376] [2021-11-07 02:07:36,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:07:36,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:36,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:07:36,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:07:36,835 INFO L87 Difference]: Start difference. First operand 1646 states and 2293 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:37,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:37,659 INFO L93 Difference]: Finished difference Result 4910 states and 6848 transitions. [2021-11-07 02:07:37,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:07:37,661 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 02:07:37,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:37,687 INFO L225 Difference]: With dead ends: 4910 [2021-11-07 02:07:37,688 INFO L226 Difference]: Without dead ends: 3277 [2021-11-07 02:07:37,694 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:07:37,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3277 states. [2021-11-07 02:07:37,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3277 to 3265. [2021-11-07 02:07:37,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3265 states, 3194 states have (on average 1.3960551033187225) internal successors, (4459), 3204 states have internal predecessors, (4459), 42 states have call successors, (42), 24 states have call predecessors, (42), 24 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-11-07 02:07:37,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3265 states to 3265 states and 4543 transitions. [2021-11-07 02:07:37,895 INFO L78 Accepts]: Start accepts. Automaton has 3265 states and 4543 transitions. Word has length 24 [2021-11-07 02:07:37,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:37,896 INFO L470 AbstractCegarLoop]: Abstraction has 3265 states and 4543 transitions. [2021-11-07 02:07:37,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:37,897 INFO L276 IsEmpty]: Start isEmpty. Operand 3265 states and 4543 transitions. [2021-11-07 02:07:37,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-07 02:07:37,905 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:37,905 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:37,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:38,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:38,130 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:07:38,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:38,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1517698873, now seen corresponding path program 1 times [2021-11-07 02:07:38,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:38,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1942526288] [2021-11-07 02:07:38,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:38,134 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:38,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:38,136 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:38,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:07:39,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:39,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:07:39,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:39,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:39,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:40,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:40,242 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:40,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1942526288] [2021-11-07 02:07:40,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1942526288] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:40,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:40,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 02:07:40,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328572522] [2021-11-07 02:07:40,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:07:40,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:40,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:07:40,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:07:40,245 INFO L87 Difference]: Start difference. First operand 3265 states and 4543 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:40,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:40,477 INFO L93 Difference]: Finished difference Result 3265 states and 4543 transitions. [2021-11-07 02:07:40,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:07:40,478 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-07 02:07:40,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:40,500 INFO L225 Difference]: With dead ends: 3265 [2021-11-07 02:07:40,500 INFO L226 Difference]: Without dead ends: 3263 [2021-11-07 02:07:40,506 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:07:40,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3263 states. [2021-11-07 02:07:40,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3263 to 3263. [2021-11-07 02:07:40,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3263 states, 3193 states have (on average 1.3958659567804572) internal successors, (4457), 3202 states have internal predecessors, (4457), 42 states have call successors, (42), 24 states have call predecessors, (42), 24 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-11-07 02:07:40,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 4541 transitions. [2021-11-07 02:07:40,757 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 4541 transitions. Word has length 25 [2021-11-07 02:07:40,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:40,758 INFO L470 AbstractCegarLoop]: Abstraction has 3263 states and 4541 transitions. [2021-11-07 02:07:40,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:40,758 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 4541 transitions. [2021-11-07 02:07:40,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 02:07:40,760 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:40,760 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:40,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:40,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:40,975 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:07:40,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:40,976 INFO L85 PathProgramCache]: Analyzing trace with hash 195975179, now seen corresponding path program 1 times [2021-11-07 02:07:40,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:40,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2053967686] [2021-11-07 02:07:40,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:40,977 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:40,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:40,979 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:41,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:07:41,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:41,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:41,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:42,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:42,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:42,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:42,603 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:42,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2053967686] [2021-11-07 02:07:42,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2053967686] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:42,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:42,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:07:42,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284144080] [2021-11-07 02:07:42,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:07:42,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:42,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:07:42,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:42,605 INFO L87 Difference]: Start difference. First operand 3263 states and 4541 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:42,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:42,786 INFO L93 Difference]: Finished difference Result 3263 states and 4541 transitions. [2021-11-07 02:07:42,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:07:42,787 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-07 02:07:42,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:42,808 INFO L225 Difference]: With dead ends: 3263 [2021-11-07 02:07:42,808 INFO L226 Difference]: Without dead ends: 3261 [2021-11-07 02:07:42,813 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:42,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3261 states. [2021-11-07 02:07:43,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3261 to 3261. [2021-11-07 02:07:43,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3261 states, 3192 states have (on average 1.3956766917293233) internal successors, (4455), 3200 states have internal predecessors, (4455), 42 states have call successors, (42), 24 states have call predecessors, (42), 24 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-11-07 02:07:43,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3261 states to 3261 states and 4539 transitions. [2021-11-07 02:07:43,072 INFO L78 Accepts]: Start accepts. Automaton has 3261 states and 4539 transitions. Word has length 26 [2021-11-07 02:07:43,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:43,072 INFO L470 AbstractCegarLoop]: Abstraction has 3261 states and 4539 transitions. [2021-11-07 02:07:43,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:43,073 INFO L276 IsEmpty]: Start isEmpty. Operand 3261 states and 4539 transitions. [2021-11-07 02:07:43,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 02:07:43,074 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:43,080 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:43,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:43,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:43,303 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:07:43,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:43,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1780263249, now seen corresponding path program 1 times [2021-11-07 02:07:43,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:43,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2136420908] [2021-11-07 02:07:43,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:43,305 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:43,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:43,306 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:43,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:07:44,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:44,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:44,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:44,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:44,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:44,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:44,760 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:44,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2136420908] [2021-11-07 02:07:44,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2136420908] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:44,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:44,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:07:44,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254216921] [2021-11-07 02:07:44,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:07:44,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:44,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:07:44,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:44,763 INFO L87 Difference]: Start difference. First operand 3261 states and 4539 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:44,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:44,948 INFO L93 Difference]: Finished difference Result 3261 states and 4539 transitions. [2021-11-07 02:07:44,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:07:44,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-07 02:07:44,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:44,971 INFO L225 Difference]: With dead ends: 3261 [2021-11-07 02:07:44,971 INFO L226 Difference]: Without dead ends: 3259 [2021-11-07 02:07:44,973 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:44,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3259 states. [2021-11-07 02:07:45,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3259 to 3259. [2021-11-07 02:07:45,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3259 states, 3191 states have (on average 1.3954873080539016) internal successors, (4453), 3198 states have internal predecessors, (4453), 42 states have call successors, (42), 24 states have call predecessors, (42), 24 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-11-07 02:07:45,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3259 states to 3259 states and 4537 transitions. [2021-11-07 02:07:45,240 INFO L78 Accepts]: Start accepts. Automaton has 3259 states and 4537 transitions. Word has length 27 [2021-11-07 02:07:45,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:45,241 INFO L470 AbstractCegarLoop]: Abstraction has 3259 states and 4537 transitions. [2021-11-07 02:07:45,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:45,241 INFO L276 IsEmpty]: Start isEmpty. Operand 3259 states and 4537 transitions. [2021-11-07 02:07:45,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 02:07:45,243 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:45,243 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:45,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:45,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:45,468 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:07:45,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:45,468 INFO L85 PathProgramCache]: Analyzing trace with hash -646414123, now seen corresponding path program 1 times [2021-11-07 02:07:45,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:45,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [591083592] [2021-11-07 02:07:45,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:45,469 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:45,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:45,471 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:45,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:07:46,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:46,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:46,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:46,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:46,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:46,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:46,964 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:46,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [591083592] [2021-11-07 02:07:46,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [591083592] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:46,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:46,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:07:46,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054588608] [2021-11-07 02:07:46,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:07:46,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:46,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:07:46,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:46,966 INFO L87 Difference]: Start difference. First operand 3259 states and 4537 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:47,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:47,175 INFO L93 Difference]: Finished difference Result 3259 states and 4537 transitions. [2021-11-07 02:07:47,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:07:47,176 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-07 02:07:47,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:47,198 INFO L225 Difference]: With dead ends: 3259 [2021-11-07 02:07:47,198 INFO L226 Difference]: Without dead ends: 3250 [2021-11-07 02:07:47,200 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:47,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2021-11-07 02:07:47,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 3250. [2021-11-07 02:07:47,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3250 states, 3183 states have (on average 1.395224630851398) internal successors, (4441), 3189 states have internal predecessors, (4441), 42 states have call successors, (42), 24 states have call predecessors, (42), 24 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-11-07 02:07:47,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3250 states to 3250 states and 4525 transitions. [2021-11-07 02:07:47,673 INFO L78 Accepts]: Start accepts. Automaton has 3250 states and 4525 transitions. Word has length 28 [2021-11-07 02:07:47,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:47,674 INFO L470 AbstractCegarLoop]: Abstraction has 3250 states and 4525 transitions. [2021-11-07 02:07:47,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:47,675 INFO L276 IsEmpty]: Start isEmpty. Operand 3250 states and 4525 transitions. [2021-11-07 02:07:47,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 02:07:47,681 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:47,681 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:47,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:47,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:47,882 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:07:47,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:47,882 INFO L85 PathProgramCache]: Analyzing trace with hash 593395099, now seen corresponding path program 1 times [2021-11-07 02:07:47,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:47,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [478258761] [2021-11-07 02:07:47,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:47,884 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:47,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:47,884 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:47,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:07:48,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:48,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:48,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:49,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:49,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:49,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:49,425 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:49,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [478258761] [2021-11-07 02:07:49,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [478258761] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:49,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:49,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:07:49,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829405944] [2021-11-07 02:07:49,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:07:49,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:49,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:07:49,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:49,428 INFO L87 Difference]: Start difference. First operand 3250 states and 4525 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:49,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:49,962 INFO L93 Difference]: Finished difference Result 7270 states and 10077 transitions. [2021-11-07 02:07:49,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:07:49,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 02:07:49,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:50,009 INFO L225 Difference]: With dead ends: 7270 [2021-11-07 02:07:50,009 INFO L226 Difference]: Without dead ends: 4033 [2021-11-07 02:07:50,016 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:50,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4033 states. [2021-11-07 02:07:50,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4033 to 3902. [2021-11-07 02:07:50,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3902 states, 3835 states have (on average 1.3833116036505868) internal successors, (5305), 3841 states have internal predecessors, (5305), 42 states have call successors, (42), 24 states have call predecessors, (42), 24 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-11-07 02:07:50,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3902 states to 3902 states and 5389 transitions. [2021-11-07 02:07:50,391 INFO L78 Accepts]: Start accepts. Automaton has 3902 states and 5389 transitions. Word has length 52 [2021-11-07 02:07:50,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:50,392 INFO L470 AbstractCegarLoop]: Abstraction has 3902 states and 5389 transitions. [2021-11-07 02:07:50,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:50,392 INFO L276 IsEmpty]: Start isEmpty. Operand 3902 states and 5389 transitions. [2021-11-07 02:07:50,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 02:07:50,398 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:50,399 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:50,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:50,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:50,624 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:07:50,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:50,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1400283468, now seen corresponding path program 1 times [2021-11-07 02:07:50,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:50,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [159925558] [2021-11-07 02:07:50,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:50,627 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:50,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:50,628 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:50,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:07:51,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:51,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:51,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:52,073 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:52,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:52,528 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:52,529 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:52,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [159925558] [2021-11-07 02:07:52,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [159925558] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:52,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:52,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:07:52,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984696964] [2021-11-07 02:07:52,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:07:52,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:52,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:07:52,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:07:52,531 INFO L87 Difference]: Start difference. First operand 3902 states and 5389 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:55,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:55,585 INFO L93 Difference]: Finished difference Result 10347 states and 14311 transitions. [2021-11-07 02:07:55,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:07:55,586 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 02:07:55,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:55,641 INFO L225 Difference]: With dead ends: 10347 [2021-11-07 02:07:55,641 INFO L226 Difference]: Without dead ends: 6458 [2021-11-07 02:07:55,650 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:07:55,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6458 states. [2021-11-07 02:07:56,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6458 to 6448. [2021-11-07 02:07:56,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6448 states, 6327 states have (on average 1.3809072230124861) internal successors, (8737), 6339 states have internal predecessors, (8737), 72 states have call successors, (72), 48 states have call predecessors, (72), 48 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2021-11-07 02:07:56,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6448 states to 6448 states and 8881 transitions. [2021-11-07 02:07:56,225 INFO L78 Accepts]: Start accepts. Automaton has 6448 states and 8881 transitions. Word has length 62 [2021-11-07 02:07:56,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:56,226 INFO L470 AbstractCegarLoop]: Abstraction has 6448 states and 8881 transitions. [2021-11-07 02:07:56,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:56,227 INFO L276 IsEmpty]: Start isEmpty. Operand 6448 states and 8881 transitions. [2021-11-07 02:07:56,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 02:07:56,233 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:56,234 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-07 02:07:56,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:56,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:56,459 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:07:56,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:56,460 INFO L85 PathProgramCache]: Analyzing trace with hash 38724080, now seen corresponding path program 1 times [2021-11-07 02:07:56,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:56,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [782892492] [2021-11-07 02:07:56,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:56,461 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:56,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:56,463 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:56,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:07:57,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:57,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:07:57,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:58,129 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 02:07:58,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:58,554 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 02:07:58,555 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:58,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [782892492] [2021-11-07 02:07:58,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [782892492] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:58,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:58,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:07:58,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905928295] [2021-11-07 02:07:58,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:07:58,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:58,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:07:58,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:07:58,557 INFO L87 Difference]: Start difference. First operand 6448 states and 8881 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:01,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:01,985 INFO L93 Difference]: Finished difference Result 35353 states and 48397 transitions. [2021-11-07 02:08:01,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:08:01,987 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 02:08:01,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:02,130 INFO L225 Difference]: With dead ends: 35353 [2021-11-07 02:08:02,130 INFO L226 Difference]: Without dead ends: 28918 [2021-11-07 02:08:02,151 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:08:02,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28918 states. [2021-11-07 02:08:03,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28918 to 6496. [2021-11-07 02:08:03,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6496 states, 6375 states have (on average 1.379921568627451) internal successors, (8797), 6387 states have internal predecessors, (8797), 72 states have call successors, (72), 48 states have call predecessors, (72), 48 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2021-11-07 02:08:03,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6496 states to 6496 states and 8941 transitions. [2021-11-07 02:08:03,296 INFO L78 Accepts]: Start accepts. Automaton has 6496 states and 8941 transitions. Word has length 76 [2021-11-07 02:08:03,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:03,297 INFO L470 AbstractCegarLoop]: Abstraction has 6496 states and 8941 transitions. [2021-11-07 02:08:03,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:03,297 INFO L276 IsEmpty]: Start isEmpty. Operand 6496 states and 8941 transitions. [2021-11-07 02:08:03,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 02:08:03,304 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:03,305 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-07 02:08:03,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:03,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:08:03,532 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:08:03,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:03,532 INFO L85 PathProgramCache]: Analyzing trace with hash -239149876, now seen corresponding path program 1 times [2021-11-07 02:08:03,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:03,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1262235431] [2021-11-07 02:08:03,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:03,533 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:03,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:03,534 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:03,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:08:04,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:04,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 02:08:04,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:06,130 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 02:08:06,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:07,980 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 02:08:07,980 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:07,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1262235431] [2021-11-07 02:08:07,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1262235431] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:07,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:08:07,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 18 [2021-11-07 02:08:07,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307658945] [2021-11-07 02:08:07,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 02:08:07,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:07,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 02:08:07,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-11-07 02:08:07,983 INFO L87 Difference]: Start difference. First operand 6496 states and 8941 transitions. Second operand has 18 states, 18 states have (on average 4.5) internal successors, (81), 18 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:18,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:18,425 INFO L93 Difference]: Finished difference Result 128810 states and 177279 transitions. [2021-11-07 02:09:18,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-11-07 02:09:18,427 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.5) internal successors, (81), 18 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-07 02:09:18,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:19,051 INFO L225 Difference]: With dead ends: 128810 [2021-11-07 02:09:19,051 INFO L226 Difference]: Without dead ends: 122327 [2021-11-07 02:09:19,106 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5429 ImplicationChecksByTransitivity, 34.2s TimeCoverageRelationStatistics Valid=2518, Invalid=12734, Unknown=0, NotChecked=0, Total=15252 [2021-11-07 02:09:19,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122327 states. [2021-11-07 02:09:21,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122327 to 6490. [2021-11-07 02:09:21,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6490 states, 6369 states have (on average 1.3779243209295022) internal successors, (8776), 6381 states have internal predecessors, (8776), 72 states have call successors, (72), 48 states have call predecessors, (72), 48 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2021-11-07 02:09:21,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6490 states to 6490 states and 8920 transitions. [2021-11-07 02:09:21,722 INFO L78 Accepts]: Start accepts. Automaton has 6490 states and 8920 transitions. Word has length 78 [2021-11-07 02:09:21,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:21,724 INFO L470 AbstractCegarLoop]: Abstraction has 6490 states and 8920 transitions. [2021-11-07 02:09:21,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.5) internal successors, (81), 18 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:21,724 INFO L276 IsEmpty]: Start isEmpty. Operand 6490 states and 8920 transitions. [2021-11-07 02:09:21,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 02:09:21,730 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:21,730 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-07 02:09:21,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:21,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:09:21,947 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:09:21,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:21,948 INFO L85 PathProgramCache]: Analyzing trace with hash 898048824, now seen corresponding path program 1 times [2021-11-07 02:09:21,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:21,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1595842001] [2021-11-07 02:09:21,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:21,949 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:21,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:21,950 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:21,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:09:22,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:22,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:09:22,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:23,413 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 02:09:23,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:23,898 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 02:09:23,898 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:23,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1595842001] [2021-11-07 02:09:23,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1595842001] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:09:23,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:09:23,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:09:23,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337872131] [2021-11-07 02:09:23,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:09:23,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:23,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:09:23,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:09:23,903 INFO L87 Difference]: Start difference. First operand 6490 states and 8920 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:31,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:31,097 INFO L93 Difference]: Finished difference Result 30193 states and 41199 transitions. [2021-11-07 02:09:31,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:09:31,097 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 02:09:31,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:31,158 INFO L225 Difference]: With dead ends: 30193 [2021-11-07 02:09:31,159 INFO L226 Difference]: Without dead ends: 23716 [2021-11-07 02:09:31,176 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:09:31,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23716 states. [2021-11-07 02:09:32,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23716 to 6532. [2021-11-07 02:09:32,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6532 states, 6411 states have (on average 1.377320230853221) internal successors, (8830), 6423 states have internal predecessors, (8830), 72 states have call successors, (72), 48 states have call predecessors, (72), 48 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2021-11-07 02:09:32,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6532 states to 6532 states and 8974 transitions. [2021-11-07 02:09:32,876 INFO L78 Accepts]: Start accepts. Automaton has 6532 states and 8974 transitions. Word has length 84 [2021-11-07 02:09:32,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:32,877 INFO L470 AbstractCegarLoop]: Abstraction has 6532 states and 8974 transitions. [2021-11-07 02:09:32,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:32,877 INFO L276 IsEmpty]: Start isEmpty. Operand 6532 states and 8974 transitions. [2021-11-07 02:09:32,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 02:09:32,883 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:32,884 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-07 02:09:32,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:33,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:09:33,099 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:09:33,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:33,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1607876528, now seen corresponding path program 1 times [2021-11-07 02:09:33,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:33,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1452578538] [2021-11-07 02:09:33,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:33,101 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:33,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:33,103 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:33,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:09:34,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:34,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:09:34,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:34,856 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 02:09:34,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:35,455 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 02:09:35,455 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:35,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1452578538] [2021-11-07 02:09:35,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1452578538] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:09:35,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:09:35,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-07 02:09:35,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908255732] [2021-11-07 02:09:35,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 02:09:35,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:35,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 02:09:35,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:09:35,457 INFO L87 Difference]: Start difference. First operand 6532 states and 8974 transitions. Second operand has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 12 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:51,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:51,089 INFO L93 Difference]: Finished difference Result 30602 states and 42022 transitions. [2021-11-07 02:09:51,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-07 02:09:51,090 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 12 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-07 02:09:51,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:51,156 INFO L225 Difference]: With dead ends: 30602 [2021-11-07 02:09:51,157 INFO L226 Difference]: Without dead ends: 24083 [2021-11-07 02:09:51,178 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=415, Invalid=1225, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 02:09:51,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24083 states. [2021-11-07 02:09:53,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24083 to 6544. [2021-11-07 02:09:53,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6544 states, 6423 states have (on average 1.376615288805854) internal successors, (8842), 6435 states have internal predecessors, (8842), 72 states have call successors, (72), 48 states have call predecessors, (72), 48 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2021-11-07 02:09:53,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6544 states to 6544 states and 8986 transitions. [2021-11-07 02:09:53,107 INFO L78 Accepts]: Start accepts. Automaton has 6544 states and 8986 transitions. Word has length 85 [2021-11-07 02:09:53,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:53,108 INFO L470 AbstractCegarLoop]: Abstraction has 6544 states and 8986 transitions. [2021-11-07 02:09:53,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 12 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:53,108 INFO L276 IsEmpty]: Start isEmpty. Operand 6544 states and 8986 transitions. [2021-11-07 02:09:53,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 02:09:53,115 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:53,116 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-07 02:09:53,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:53,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:09:53,331 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:09:53,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:53,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1986026190, now seen corresponding path program 1 times [2021-11-07 02:09:53,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:53,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [365980274] [2021-11-07 02:09:53,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:53,333 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:53,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:53,335 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:53,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:09:54,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:54,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:09:54,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:55,575 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:09:55,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:56,661 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:09:56,662 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:56,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [365980274] [2021-11-07 02:09:56,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [365980274] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:56,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2006162047] [2021-11-07 02:09:56,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:56,662 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:09:56,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:09:56,664 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:09:56,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-07 02:09:57,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:58,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:09:58,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:58,893 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:09:58,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:59,814 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:09:59,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2006162047] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:09:59,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015085956] [2021-11-07 02:09:59,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:59,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:09:59,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:09:59,817 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:09:59,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 02:10:00,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:00,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:10:00,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:01,752 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:10:01,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:02,634 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:10:02,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015085956] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:02,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:10:02,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2021-11-07 02:10:02,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686039891] [2021-11-07 02:10:02,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:10:02,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:02,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:10:02,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:10:02,637 INFO L87 Difference]: Start difference. First operand 6544 states and 8986 transitions. Second operand has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:16,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:16,055 INFO L93 Difference]: Finished difference Result 39194 states and 53835 transitions. [2021-11-07 02:10:16,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:10:16,056 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-07 02:10:16,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:16,166 INFO L225 Difference]: With dead ends: 39194 [2021-11-07 02:10:16,166 INFO L226 Difference]: Without dead ends: 39189 [2021-11-07 02:10:16,182 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:10:16,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39189 states. [2021-11-07 02:10:24,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39189 to 38656. [2021-11-07 02:10:24,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38656 states, 37935 states have (on average 1.379596678529063) internal successors, (52335), 38007 states have internal predecessors, (52335), 432 states have call successors, (432), 288 states have call predecessors, (432), 288 states have return successors, (432), 432 states have call predecessors, (432), 432 states have call successors, (432) [2021-11-07 02:10:24,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38656 states to 38656 states and 53199 transitions. [2021-11-07 02:10:24,703 INFO L78 Accepts]: Start accepts. Automaton has 38656 states and 53199 transitions. Word has length 85 [2021-11-07 02:10:24,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:24,703 INFO L470 AbstractCegarLoop]: Abstraction has 38656 states and 53199 transitions. [2021-11-07 02:10:24,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:24,703 INFO L276 IsEmpty]: Start isEmpty. Operand 38656 states and 53199 transitions. [2021-11-07 02:10:24,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 02:10:24,732 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:24,733 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-07 02:10:24,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:24,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:25,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-07 02:10:25,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:25,347 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:10:25,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:25,348 INFO L85 PathProgramCache]: Analyzing trace with hash -820592305, now seen corresponding path program 1 times [2021-11-07 02:10:25,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:25,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2081317147] [2021-11-07 02:10:25,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:25,349 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:25,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:25,350 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:25,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:10:26,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:26,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:10:26,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:27,292 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 02:10:27,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:28,144 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 02:10:28,145 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:28,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2081317147] [2021-11-07 02:10:28,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2081317147] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:28,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:10:28,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:10:28,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909237381] [2021-11-07 02:10:28,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:10:28,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:28,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:10:28,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:10:28,148 INFO L87 Difference]: Start difference. First operand 38656 states and 53199 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:35,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:35,256 INFO L93 Difference]: Finished difference Result 52421 states and 72141 transitions. [2021-11-07 02:10:35,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:10:35,257 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-07 02:10:35,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:35,291 INFO L225 Difference]: With dead ends: 52421 [2021-11-07 02:10:35,292 INFO L226 Difference]: Without dead ends: 13044 [2021-11-07 02:10:35,376 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:10:35,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13044 states. [2021-11-07 02:10:39,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13044 to 13044. [2021-11-07 02:10:39,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13044 states, 12803 states have (on average 1.3739748496446145) internal successors, (17591), 12827 states have internal predecessors, (17591), 144 states have call successors, (144), 96 states have call predecessors, (144), 96 states have return successors, (144), 144 states have call predecessors, (144), 144 states have call successors, (144) [2021-11-07 02:10:39,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13044 states to 13044 states and 17879 transitions. [2021-11-07 02:10:39,668 INFO L78 Accepts]: Start accepts. Automaton has 13044 states and 17879 transitions. Word has length 92 [2021-11-07 02:10:39,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:39,668 INFO L470 AbstractCegarLoop]: Abstraction has 13044 states and 17879 transitions. [2021-11-07 02:10:39,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:39,669 INFO L276 IsEmpty]: Start isEmpty. Operand 13044 states and 17879 transitions. [2021-11-07 02:10:39,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-07 02:10:39,684 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:39,684 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 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] [2021-11-07 02:10:39,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:39,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:39,911 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:10:39,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:39,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1278908591, now seen corresponding path program 1 times [2021-11-07 02:10:39,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:39,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [99820594] [2021-11-07 02:10:39,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:39,914 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:39,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:39,916 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:39,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:10:41,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:41,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:10:41,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:42,008 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 02:10:42,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:42,634 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 02:10:42,634 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:42,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [99820594] [2021-11-07 02:10:42,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [99820594] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:42,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:10:42,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:10:42,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813260762] [2021-11-07 02:10:42,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:10:42,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:42,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:10:42,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:10:42,636 INFO L87 Difference]: Start difference. First operand 13044 states and 17879 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:47,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:47,236 INFO L93 Difference]: Finished difference Result 33854 states and 46738 transitions. [2021-11-07 02:10:47,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:10:47,237 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-07 02:10:47,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:47,289 INFO L225 Difference]: With dead ends: 33854 [2021-11-07 02:10:47,289 INFO L226 Difference]: Without dead ends: 20778 [2021-11-07 02:10:47,306 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:10:47,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20778 states. [2021-11-07 02:10:52,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20778 to 20676. [2021-11-07 02:10:52,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20676 states, 20195 states have (on average 1.3887100767516711) internal successors, (28045), 20243 states have internal predecessors, (28045), 288 states have call successors, (288), 192 states have call predecessors, (288), 192 states have return successors, (288), 288 states have call predecessors, (288), 288 states have call successors, (288) [2021-11-07 02:10:52,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20676 states to 20676 states and 28621 transitions. [2021-11-07 02:10:52,789 INFO L78 Accepts]: Start accepts. Automaton has 20676 states and 28621 transitions. Word has length 95 [2021-11-07 02:10:52,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:52,789 INFO L470 AbstractCegarLoop]: Abstraction has 20676 states and 28621 transitions. [2021-11-07 02:10:52,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:52,789 INFO L276 IsEmpty]: Start isEmpty. Operand 20676 states and 28621 transitions. [2021-11-07 02:10:52,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-07 02:10:52,808 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:52,809 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 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] [2021-11-07 02:10:52,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:53,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:53,015 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:10:53,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:53,016 INFO L85 PathProgramCache]: Analyzing trace with hash -2061230925, now seen corresponding path program 2 times [2021-11-07 02:10:53,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:53,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1687502586] [2021-11-07 02:10:53,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:10:53,017 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:53,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:53,018 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:53,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3172c7-3a00-410c-a0ea-53c4af75c118/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process