./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--storage--uas.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_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/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_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--storage--uas.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/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_8dee6610-957a-4db6-9c7f-5594182ce7db/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 4d59f12bf134f1df229541fa7d7be9025273d18d299c01e889ca23a568445b7a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:14:14,306 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:14:14,308 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:14:14,357 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:14:14,358 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:14:14,360 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:14:14,362 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:14:14,364 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:14:14,367 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:14:14,368 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:14:14,370 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:14:14,372 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:14:14,372 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:14:14,374 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:14:14,376 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:14:14,378 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:14:14,379 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:14:14,381 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:14:14,384 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:14:14,387 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:14:14,390 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:14:14,392 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:14:14,394 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:14:14,395 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:14:14,400 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:14:14,400 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:14:14,401 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:14:14,402 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:14:14,403 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:14:14,405 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:14:14,405 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:14:14,407 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:14:14,408 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:14:14,409 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:14:14,411 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:14:14,411 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:14:14,412 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:14:14,413 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:14:14,414 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:14:14,415 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:14:14,416 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:14:14,422 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 02:14:14,480 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:14:14,481 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:14:14,482 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:14:14,483 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:14:14,483 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:14:14,483 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:14:14,484 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:14:14,484 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:14:14,485 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:14:14,485 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:14:14,486 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:14:14,486 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:14:14,489 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:14:14,491 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:14:14,491 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:14:14,492 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:14:14,493 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:14:14,493 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:14:14,493 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:14:14,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:14:14,494 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:14:14,494 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:14:14,494 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:14:14,495 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:14:14,495 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:14:14,495 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:14:14,496 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:14:14,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:14:14,497 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:14:14,499 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:14:14,499 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:14:14,499 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:14:14,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:14:14,500 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:14:14,500 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:14:14,501 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:14:14,502 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_8dee6610-957a-4db6-9c7f-5594182ce7db/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d59f12bf134f1df229541fa7d7be9025273d18d299c01e889ca23a568445b7a [2021-11-07 02:14:14,819 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:14:14,847 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:14:14,850 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:14:14,852 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:14:14,853 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:14:14,854 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--storage--uas.ko-entry_point.cil.out.i [2021-11-07 02:14:14,957 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/data/df7ce4834/fa1f48dc83f84993bb382e8f2c95a721/FLAG1861583b0 [2021-11-07 02:14:15,955 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:14:15,956 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--storage--uas.ko-entry_point.cil.out.i [2021-11-07 02:14:16,021 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/data/df7ce4834/fa1f48dc83f84993bb382e8f2c95a721/FLAG1861583b0 [2021-11-07 02:14:16,385 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/data/df7ce4834/fa1f48dc83f84993bb382e8f2c95a721 [2021-11-07 02:14:16,387 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:14:16,389 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:14:16,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:14:16,392 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:14:16,395 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:14:16,396 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:14:16" (1/1) ... [2021-11-07 02:14:16,398 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e150def and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:16, skipping insertion in model container [2021-11-07 02:14:16,398 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:14:16" (1/1) ... [2021-11-07 02:14:16,406 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:14:16,589 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:14:17,888 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:14:18,056 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:14:18,064 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:14:18,080 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:14:18,112 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:14:18,124 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:14:18,129 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:14:18,130 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:14:18,138 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:14:18,146 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:14:18,147 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:14:18,172 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:14:18,180 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:14:18,187 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:14:18,204 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:14:18,220 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:14:18,228 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:14:18,242 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:14:18,364 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:14:18,371 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:14:18,389 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:14:18,400 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:14:18,405 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:14:18,419 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:14:18,463 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:14:18,480 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:14:18,489 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:14:18,489 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:14:18,500 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:14:18,501 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:14:18,501 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:14:18,509 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_8dee6610-957a-4db6-9c7f-5594182ce7db/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--storage--uas.ko-entry_point.cil.out.i[216842,216855] [2021-11-07 02:14:18,562 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:14:18,620 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 02:14:18,621 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@38ca6710 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:18, skipping insertion in model container [2021-11-07 02:14:18,622 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:14:18,622 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:14:18,626 INFO L168 Benchmark]: Toolchain (without parser) took 2234.49 ms. Allocated memory was 100.7 MB in the beginning and 142.6 MB in the end (delta: 41.9 MB). Free memory was 57.4 MB in the beginning and 93.5 MB in the end (delta: -36.1 MB). Peak memory consumption was 43.8 MB. Max. memory is 16.1 GB. [2021-11-07 02:14:18,627 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 100.7 MB. Free memory is still 53.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:14:18,629 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2231.13 ms. Allocated memory was 100.7 MB in the beginning and 142.6 MB in the end (delta: 41.9 MB). Free memory was 57.2 MB in the beginning and 93.5 MB in the end (delta: -36.3 MB). Peak memory consumption was 41.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:14:18,631 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 100.7 MB. Free memory is still 53.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 2231.13 ms. Allocated memory was 100.7 MB in the beginning and 142.6 MB in the end (delta: 41.9 MB). Free memory was 57.2 MB in the beginning and 93.5 MB in the end (delta: -36.3 MB). Peak memory consumption was 41.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 5046]: 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_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/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_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--storage--uas.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/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_8dee6610-957a-4db6-9c7f-5594182ce7db/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 4d59f12bf134f1df229541fa7d7be9025273d18d299c01e889ca23a568445b7a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:14:21,405 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:14:21,407 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:14:21,471 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:14:21,472 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:14:21,477 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:14:21,480 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:14:21,485 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:14:21,489 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:14:21,499 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:14:21,501 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:14:21,503 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:14:21,503 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:14:21,506 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:14:21,509 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:14:21,516 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:14:21,518 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:14:21,519 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:14:21,521 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:14:21,534 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:14:21,536 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:14:21,538 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:14:21,541 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:14:21,545 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:14:21,556 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:14:21,556 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:14:21,557 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:14:21,559 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:14:21,560 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:14:21,562 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:14:21,562 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:14:21,563 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:14:21,566 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:14:21,567 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:14:21,569 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:14:21,569 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:14:21,581 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:14:21,581 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:14:21,582 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:14:21,584 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:14:21,585 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:14:21,591 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 02:14:21,647 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:14:21,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:14:21,650 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:14:21,650 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:14:21,650 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:14:21,651 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:14:21,651 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:14:21,651 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:14:21,651 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:14:21,653 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:14:21,655 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:14:21,655 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:14:21,655 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:14:21,656 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:14:21,656 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:14:21,656 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:14:21,656 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:14:21,657 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:14:21,657 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:14:21,657 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:14:21,658 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:14:21,658 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:14:21,658 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:14:21,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:14:21,659 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:14:21,659 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:14:21,659 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:14:21,660 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:14:21,660 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:14:21,660 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:14:21,660 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:14:21,661 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:14:21,661 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_8dee6610-957a-4db6-9c7f-5594182ce7db/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d59f12bf134f1df229541fa7d7be9025273d18d299c01e889ca23a568445b7a [2021-11-07 02:14:22,136 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:14:22,171 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:14:22,174 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:14:22,176 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:14:22,177 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:14:22,178 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--storage--uas.ko-entry_point.cil.out.i [2021-11-07 02:14:22,267 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/data/f50c04b5f/60d5dffb9dd74a1db4bb2bb65f87cc91/FLAG0e8157131 [2021-11-07 02:14:23,432 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:14:23,433 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--storage--uas.ko-entry_point.cil.out.i [2021-11-07 02:14:23,482 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/data/f50c04b5f/60d5dffb9dd74a1db4bb2bb65f87cc91/FLAG0e8157131 [2021-11-07 02:14:23,817 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/data/f50c04b5f/60d5dffb9dd74a1db4bb2bb65f87cc91 [2021-11-07 02:14:23,820 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:14:23,822 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:14:23,824 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:14:23,824 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:14:23,828 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:14:23,829 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:14:23" (1/1) ... [2021-11-07 02:14:23,831 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6caef97e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:23, skipping insertion in model container [2021-11-07 02:14:23,831 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:14:23" (1/1) ... [2021-11-07 02:14:23,840 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:14:23,978 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:14:25,931 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_8dee6610-957a-4db6-9c7f-5594182ce7db/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--storage--uas.ko-entry_point.cil.out.i[216842,216855] [2021-11-07 02:14:26,031 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:14:26,112 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:14:26,221 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:14:26,617 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_8dee6610-957a-4db6-9c7f-5594182ce7db/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--storage--uas.ko-entry_point.cil.out.i[216842,216855] [2021-11-07 02:14:26,631 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:14:26,675 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:14:27,123 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_8dee6610-957a-4db6-9c7f-5594182ce7db/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--storage--uas.ko-entry_point.cil.out.i[216842,216855] [2021-11-07 02:14:27,131 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:14:27,280 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:14:27,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:27 WrapperNode [2021-11-07 02:14:27,281 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:14:27,283 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:14:27,283 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:14:27,283 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:14:27,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:27" (1/1) ... [2021-11-07 02:14:27,419 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:27" (1/1) ... [2021-11-07 02:14:28,174 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:14:28,175 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:14:28,176 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:14:28,176 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:14:28,186 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:27" (1/1) ... [2021-11-07 02:14:28,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:27" (1/1) ... [2021-11-07 02:14:28,456 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:27" (1/1) ... [2021-11-07 02:14:28,457 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:27" (1/1) ... [2021-11-07 02:14:29,272 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:27" (1/1) ... [2021-11-07 02:14:29,401 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:27" (1/1) ... [2021-11-07 02:14:29,489 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:27" (1/1) ... [2021-11-07 02:14:29,591 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:14:29,592 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:14:29,592 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:14:29,592 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:14:29,593 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:27" (1/1) ... [2021-11-07 02:14:29,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:14:29,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:14:29,633 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:14:29,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:14:29,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 02:14:29,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 02:14:29,690 INFO L130 BoogieDeclarations]: Found specification of procedure uas_zap_pending [2021-11-07 02:14:29,690 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_zap_pending [2021-11-07 02:14:29,691 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 02:14:29,691 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 02:14:29,691 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-07 02:14:29,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 02:14:29,691 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:14:29,692 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 02:14:29,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-07 02:14:29,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 02:14:29,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-07 02:14:29,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 02:14:29,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 02:14:29,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 02:14:29,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-07 02:14:29,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:14:29,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 02:14:29,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-07 02:14:29,694 INFO L130 BoogieDeclarations]: Found specification of procedure uas_try_complete [2021-11-07 02:14:29,694 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_try_complete [2021-11-07 02:14:29,694 INFO L130 BoogieDeclarations]: Found specification of procedure uas_data_cmplt [2021-11-07 02:14:29,694 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_data_cmplt [2021-11-07 02:14:29,695 INFO L130 BoogieDeclarations]: Found specification of procedure uas_disconnect [2021-11-07 02:14:29,695 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_disconnect [2021-11-07 02:14:29,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-07 02:14:29,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-07 02:14:29,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-07 02:14:29,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-07 02:14:29,696 INFO L130 BoogieDeclarations]: Found specification of procedure uas_stat_cmplt [2021-11-07 02:14:29,696 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_stat_cmplt [2021-11-07 02:14:29,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 02:14:29,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 02:14:29,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-07 02:14:29,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-07 02:14:29,697 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-07 02:14:29,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-07 02:14:29,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-07 02:14:29,698 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-07 02:14:29,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:14:29,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:17:29,692 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:17:29,692 INFO L299 CfgBuilder]: Removed 3060 assume(true) statements. [2021-11-07 02:17:29,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:17:29 BoogieIcfgContainer [2021-11-07 02:17:29,700 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:17:29,703 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:17:29,703 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:17:29,706 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:17:29,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:14:23" (1/3) ... [2021-11-07 02:17:29,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@172dde63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:17:29, skipping insertion in model container [2021-11-07 02:17:29,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:27" (2/3) ... [2021-11-07 02:17:29,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@172dde63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:17:29, skipping insertion in model container [2021-11-07 02:17:29,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:17:29" (3/3) ... [2021-11-07 02:17:29,710 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--usb--storage--uas.ko-entry_point.cil.out.i [2021-11-07 02:17:29,717 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:17:29,717 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 120 error locations. [2021-11-07 02:17:29,798 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:17:29,805 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 02:17:29,806 INFO L340 AbstractCegarLoop]: Starting to check reachability of 120 error locations. [2021-11-07 02:17:29,941 INFO L276 IsEmpty]: Start isEmpty. Operand has 4528 states, 4387 states have (on average 1.4424435833143379) internal successors, (6328), 4510 states have internal predecessors, (6328), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-07 02:17:29,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 02:17:29,957 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:29,958 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:17:29,959 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~TO~VOIDErr1ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~TO~VOIDErr2ASSERT_VIOLATIONERROR_FUNCTION (and 117 more)] === [2021-11-07 02:17:29,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:29,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1622129590, now seen corresponding path program 1 times [2021-11-07 02:17:29,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:17:29,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1860502967] [2021-11-07 02:17:29,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:29,990 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:17:29,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:17:29,995 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:17:30,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:17:32,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:32,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 1488 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:17:32,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:33,094 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 02:17:33,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:33,312 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 02:17:33,313 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:17:33,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1860502967] [2021-11-07 02:17:33,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1860502967] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:33,314 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:17:33,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:17:33,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702133951] [2021-11-07 02:17:33,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:17:33,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:17:33,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:17:33,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:17:33,355 INFO L87 Difference]: Start difference. First operand has 4528 states, 4387 states have (on average 1.4424435833143379) internal successors, (6328), 4510 states have internal predecessors, (6328), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 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 02:17:33,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:17:33,658 INFO L93 Difference]: Finished difference Result 9052 states and 12721 transitions. [2021-11-07 02:17:33,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:17:33,660 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 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 40 [2021-11-07 02:17:33,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:17:33,708 INFO L225 Difference]: With dead ends: 9052 [2021-11-07 02:17:33,708 INFO L226 Difference]: Without dead ends: 4517 [2021-11-07 02:17:33,728 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:17:33,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4517 states. [2021-11-07 02:17:33,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4517 to 4517. [2021-11-07 02:17:33,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4517 states, 4377 states have (on average 1.394334018734293) internal successors, (6103), 4499 states have internal predecessors, (6103), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-07 02:17:33,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4517 states to 4517 states and 6131 transitions. [2021-11-07 02:17:33,980 INFO L78 Accepts]: Start accepts. Automaton has 4517 states and 6131 transitions. Word has length 40 [2021-11-07 02:17:33,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:17:33,980 INFO L470 AbstractCegarLoop]: Abstraction has 4517 states and 6131 transitions. [2021-11-07 02:17:33,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 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 02:17:33,981 INFO L276 IsEmpty]: Start isEmpty. Operand 4517 states and 6131 transitions. [2021-11-07 02:17:33,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 02:17:33,986 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:33,986 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:17:34,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:17:34,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:17:34,199 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~TO~VOIDErr1ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~TO~VOIDErr2ASSERT_VIOLATIONERROR_FUNCTION (and 117 more)] === [2021-11-07 02:17:34,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:34,201 INFO L85 PathProgramCache]: Analyzing trace with hash 423605326, now seen corresponding path program 1 times [2021-11-07 02:17:34,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:17:34,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [4528343] [2021-11-07 02:17:34,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:34,206 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:17:34,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:17:34,208 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:17:34,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:17:36,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:37,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 1488 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:17:37,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:37,318 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 02:17:37,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:37,534 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 02:17:37,534 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:17:37,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [4528343] [2021-11-07 02:17:37,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [4528343] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:37,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:17:37,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:17:37,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301400488] [2021-11-07 02:17:37,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:17:37,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:17:37,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:17:37,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:17:37,538 INFO L87 Difference]: Start difference. First operand 4517 states and 6131 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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 02:17:40,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:17:40,116 INFO L93 Difference]: Finished difference Result 9024 states and 12257 transitions. [2021-11-07 02:17:40,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:17:40,117 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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 40 [2021-11-07 02:17:40,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:17:40,151 INFO L225 Difference]: With dead ends: 9024 [2021-11-07 02:17:40,151 INFO L226 Difference]: Without dead ends: 4523 [2021-11-07 02:17:40,166 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 76 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 02:17:40,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4523 states. [2021-11-07 02:17:40,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4523 to 4523. [2021-11-07 02:17:40,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4523 states, 4383 states have (on average 1.3937942048825005) internal successors, (6109), 4505 states have internal predecessors, (6109), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-07 02:17:40,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4523 states to 4523 states and 6137 transitions. [2021-11-07 02:17:40,333 INFO L78 Accepts]: Start accepts. Automaton has 4523 states and 6137 transitions. Word has length 40 [2021-11-07 02:17:40,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:17:40,333 INFO L470 AbstractCegarLoop]: Abstraction has 4523 states and 6137 transitions. [2021-11-07 02:17:40,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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 02:17:40,334 INFO L276 IsEmpty]: Start isEmpty. Operand 4523 states and 6137 transitions. [2021-11-07 02:17:40,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 02:17:40,336 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:40,337 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:17:40,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:17:40,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:17:40,563 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~TO~VOIDErr1ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~TO~VOIDErr2ASSERT_VIOLATIONERROR_FUNCTION (and 117 more)] === [2021-11-07 02:17:40,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:40,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1776937966, now seen corresponding path program 1 times [2021-11-07 02:17:40,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:17:40,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1453588202] [2021-11-07 02:17:40,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:40,570 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:17:40,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:17:40,571 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:17:40,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:17:43,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:43,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 1498 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:17:43,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:43,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:17:43,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:44,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:17:44,220 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:17:44,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1453588202] [2021-11-07 02:17:44,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1453588202] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:17:44,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [291446870] [2021-11-07 02:17:44,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:44,221 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:17:44,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:17:44,234 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:17:44,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-07 02:17:46,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:46,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 1498 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 02:17:46,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:46,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:17:46,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:46,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:17:46,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [291446870] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:46,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:17:46,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 12 [2021-11-07 02:17:46,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894445551] [2021-11-07 02:17:46,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:17:46,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:17:46,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:17:46,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:17:46,826 INFO L87 Difference]: Start difference. First operand 4523 states and 6137 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 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 02:17:49,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:17:49,635 INFO L93 Difference]: Finished difference Result 6122 states and 8362 transitions. [2021-11-07 02:17:49,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:17:49,638 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 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 42 [2021-11-07 02:17:49,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:17:49,682 INFO L225 Difference]: With dead ends: 6122 [2021-11-07 02:17:49,683 INFO L226 Difference]: Without dead ends: 5996 [2021-11-07 02:17:49,688 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:17:49,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5996 states. [2021-11-07 02:17:50,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5996 to 4397. [2021-11-07 02:17:50,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4397 states, 4320 states have (on average 1.3849537037037036) internal successors, (5983), 4379 states have internal predecessors, (5983), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-07 02:17:50,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4397 states to 4397 states and 6011 transitions. [2021-11-07 02:17:50,061 INFO L78 Accepts]: Start accepts. Automaton has 4397 states and 6011 transitions. Word has length 42 [2021-11-07 02:17:50,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:17:50,062 INFO L470 AbstractCegarLoop]: Abstraction has 4397 states and 6011 transitions. [2021-11-07 02:17:50,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 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 02:17:50,062 INFO L276 IsEmpty]: Start isEmpty. Operand 4397 states and 6011 transitions. [2021-11-07 02:17:50,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 02:17:50,069 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:50,069 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:17:50,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:17:50,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-07 02:17:50,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:17:50,489 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~TO~VOIDErr1ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~TO~VOIDErr2ASSERT_VIOLATIONERROR_FUNCTION (and 117 more)] === [2021-11-07 02:17:50,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:50,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1673108703, now seen corresponding path program 1 times [2021-11-07 02:17:50,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:17:50,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1951337797] [2021-11-07 02:17:50,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:50,496 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:17:50,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:17:50,498 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:17:50,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:17:53,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:53,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 1519 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:17:53,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:53,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:17:53,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:54,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:17:54,128 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:17:54,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1951337797] [2021-11-07 02:17:54,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1951337797] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:17:54,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [941854377] [2021-11-07 02:17:54,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:54,130 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:17:54,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:17:54,134 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:17:54,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-07 02:17:56,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:56,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 1519 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 02:17:56,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:56,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:17:56,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:57,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:17:57,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [941854377] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:57,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:17:57,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [5, 5] total 15 [2021-11-07 02:17:57,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68483956] [2021-11-07 02:17:57,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 02:17:57,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:17:57,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 02:17:57,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:17:57,188 INFO L87 Difference]: Start difference. First operand 4397 states and 6011 transitions. Second operand has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 9 states have internal predecessors, (65), 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 02:18:21,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:21,416 INFO L93 Difference]: Finished difference Result 21765 states and 29936 transitions. [2021-11-07 02:18:21,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:18:21,418 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 9 states have internal predecessors, (65), 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 48 [2021-11-07 02:18:21,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:21,535 INFO L225 Difference]: With dead ends: 21765 [2021-11-07 02:18:21,535 INFO L226 Difference]: Without dead ends: 17389 [2021-11-07 02:18:21,553 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-11-07 02:18:21,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17389 states. [2021-11-07 02:18:21,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17389 to 4424. [2021-11-07 02:18:22,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4424 states, 4347 states have (on average 1.382562686910513) internal successors, (6010), 4406 states have internal predecessors, (6010), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-07 02:18:22,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4424 states to 4424 states and 6038 transitions. [2021-11-07 02:18:22,029 INFO L78 Accepts]: Start accepts. Automaton has 4424 states and 6038 transitions. Word has length 48 [2021-11-07 02:18:22,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:22,032 INFO L470 AbstractCegarLoop]: Abstraction has 4424 states and 6038 transitions. [2021-11-07 02:18:22,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 9 states have internal predecessors, (65), 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 02:18:22,033 INFO L276 IsEmpty]: Start isEmpty. Operand 4424 states and 6038 transitions. [2021-11-07 02:18:22,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 02:18:22,039 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:22,039 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:22,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:22,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:22,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:18:22,451 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~TO~VOIDErr1ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~TO~VOIDErr2ASSERT_VIOLATIONERROR_FUNCTION (and 117 more)] === [2021-11-07 02:18:22,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:22,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1725175075, now seen corresponding path program 1 times [2021-11-07 02:18:22,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:22,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1102259139] [2021-11-07 02:18:22,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:22,455 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:22,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:22,456 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:22,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:18:25,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:25,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:18:25,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:25,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:25,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:25,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:25,949 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:25,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1102259139] [2021-11-07 02:18:25,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1102259139] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:18:25,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1226684500] [2021-11-07 02:18:25,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:25,949 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:18:25,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:18:25,950 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:18:25,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-07 02:18:27,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:27,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 02:18:27,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:28,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:18:28,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:28,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:18:28,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1226684500] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:28,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:18:28,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-07 02:18:28,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439728497] [2021-11-07 02:18:28,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:18:28,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:28,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:18:28,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:18:28,534 INFO L87 Difference]: Start difference. First operand 4424 states and 6038 transitions. Second operand has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 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 02:18:32,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:32,207 INFO L93 Difference]: Finished difference Result 9454 states and 13017 transitions. [2021-11-07 02:18:32,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:18:32,208 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 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 50 [2021-11-07 02:18:32,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:32,236 INFO L225 Difference]: With dead ends: 9454 [2021-11-07 02:18:32,236 INFO L226 Difference]: Without dead ends: 9436 [2021-11-07 02:18:32,239 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-11-07 02:18:32,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9436 states. [2021-11-07 02:18:32,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9436 to 4406. [2021-11-07 02:18:32,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4406 states, 4338 states have (on average 1.3812816966343937) internal successors, (5992), 4388 states have internal predecessors, (5992), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-07 02:18:32,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4406 states to 4406 states and 6020 transitions. [2021-11-07 02:18:32,606 INFO L78 Accepts]: Start accepts. Automaton has 4406 states and 6020 transitions. Word has length 50 [2021-11-07 02:18:32,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:32,607 INFO L470 AbstractCegarLoop]: Abstraction has 4406 states and 6020 transitions. [2021-11-07 02:18:32,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 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 02:18:32,607 INFO L276 IsEmpty]: Start isEmpty. Operand 4406 states and 6020 transitions. [2021-11-07 02:18:32,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 02:18:32,613 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:32,613 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:32,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:32,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:33,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:33,041 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~TO~VOIDErr1ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~TO~VOIDErr2ASSERT_VIOLATIONERROR_FUNCTION (and 117 more)] === [2021-11-07 02:18:33,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:33,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1751041319, now seen corresponding path program 1 times [2021-11-07 02:18:33,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:33,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1770811247] [2021-11-07 02:18:33,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:33,044 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:33,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:33,045 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:33,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:18:35,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:35,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 1534 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:18:35,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:36,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:36,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:36,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:36,511 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:36,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1770811247] [2021-11-07 02:18:36,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1770811247] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:18:36,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [724550795] [2021-11-07 02:18:36,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:36,512 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:18:36,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:18:36,513 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:18:36,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-07 02:18:38,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:38,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 1534 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 02:18:38,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:38,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:18:38,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:39,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:18:39,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [724550795] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:39,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:18:39,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [5, 5] total 18 [2021-11-07 02:18:39,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984033869] [2021-11-07 02:18:39,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 02:18:39,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:39,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 02:18:39,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-11-07 02:18:39,223 INFO L87 Difference]: Start difference. First operand 4406 states and 6020 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 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 02:19:27,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:27,051 INFO L93 Difference]: Finished difference Result 31036 states and 42737 transitions. [2021-11-07 02:19:27,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 02:19:27,053 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 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 02:19:27,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:27,134 INFO L225 Difference]: With dead ends: 31036 [2021-11-07 02:19:27,134 INFO L226 Difference]: Without dead ends: 26651 [2021-11-07 02:19:27,148 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-11-07 02:19:27,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26651 states. [2021-11-07 02:19:27,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26651 to 4433. [2021-11-07 02:19:27,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4433 states, 4365 states have (on average 1.3789232531500573) internal successors, (6019), 4415 states have internal predecessors, (6019), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-07 02:19:27,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4433 states to 4433 states and 6047 transitions. [2021-11-07 02:19:27,665 INFO L78 Accepts]: Start accepts. Automaton has 4433 states and 6047 transitions. Word has length 52 [2021-11-07 02:19:27,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:27,666 INFO L470 AbstractCegarLoop]: Abstraction has 4433 states and 6047 transitions. [2021-11-07 02:19:27,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 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 02:19:27,667 INFO L276 IsEmpty]: Start isEmpty. Operand 4433 states and 6047 transitions. [2021-11-07 02:19:27,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 02:19:27,674 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:27,674 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:19:27,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:27,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:28,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:28,093 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION === [##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~TO~VOIDErr1ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~TO~VOIDErr2ASSERT_VIOLATIONERROR_FUNCTION (and 117 more)] === [2021-11-07 02:19:28,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:28,093 INFO L85 PathProgramCache]: Analyzing trace with hash -585579390, now seen corresponding path program 1 times [2021-11-07 02:19:28,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:28,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [707192954] [2021-11-07 02:19:28,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:28,096 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:28,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:28,096 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:28,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:19:30,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:30,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 1607 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:19:30,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:30,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:30,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:31,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:31,462 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:31,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [707192954] [2021-11-07 02:19:31,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [707192954] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:19:31,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [389896319] [2021-11-07 02:19:31,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:31,462 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:19:31,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:19:31,463 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:19:31,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-07 02:19:33,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:33,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 1607 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:19:33,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:33,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:19:33,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:33,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:19:33,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [389896319] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:33,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:19:33,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 02:19:33,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489577618] [2021-11-07 02:19:33,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:19:33,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:33,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:19:33,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:19:33,594 INFO L87 Difference]: Start difference. First operand 4433 states and 6047 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:34,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:34,649 INFO L93 Difference]: Finished difference Result 12809 states and 17495 transitions. [2021-11-07 02:19:34,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:19:34,650 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-07 02:19:34,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:34,673 INFO L225 Difference]: With dead ends: 12809 [2021-11-07 02:19:34,673 INFO L226 Difference]: Without dead ends: 8397 [2021-11-07 02:19:34,685 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:19:34,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8397 states. [2021-11-07 02:19:35,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8397 to 7065. [2021-11-07 02:19:35,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7065 states, 6997 states have (on average 1.376875803915964) internal successors, (9634), 7047 states have internal predecessors, (9634), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-07 02:19:35,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7065 states to 7065 states and 9662 transitions. [2021-11-07 02:19:35,441 INFO L78 Accepts]: Start accepts. Automaton has 7065 states and 9662 transitions. Word has length 59 [2021-11-07 02:19:35,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:35,441 INFO L470 AbstractCegarLoop]: Abstraction has 7065 states and 9662 transitions. [2021-11-07 02:19:35,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:35,442 INFO L276 IsEmpty]: Start isEmpty. Operand 7065 states and 9662 transitions. [2021-11-07 02:19:35,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 02:19:35,446 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:35,447 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:19:35,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:35,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:35,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:35,863 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~TO~VOIDErr1ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~TO~VOIDErr2ASSERT_VIOLATIONERROR_FUNCTION (and 117 more)] === [2021-11-07 02:19:35,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:35,864 INFO L85 PathProgramCache]: Analyzing trace with hash -916064925, now seen corresponding path program 1 times [2021-11-07 02:19:35,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:35,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [535961723] [2021-11-07 02:19:35,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:35,866 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:35,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:35,867 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:35,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:19:38,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:38,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 1527 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:19:38,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:38,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:38,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:39,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:39,144 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:39,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [535961723] [2021-11-07 02:19:39,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [535961723] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:19:39,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [846026767] [2021-11-07 02:19:39,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:39,145 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:19:39,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:19:39,145 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:19:39,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-07 02:19:40,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:40,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 1527 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 02:19:40,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:41,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:19:41,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:41,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:19:41,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [846026767] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:41,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:19:41,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-07 02:19:41,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708094410] [2021-11-07 02:19:41,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:19:41,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:41,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:19:41,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:19:41,666 INFO L87 Difference]: Start difference. First operand 7065 states and 9662 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 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 02:20:10,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:10,569 INFO L93 Difference]: Finished difference Result 36983 states and 50967 transitions. [2021-11-07 02:20:10,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:20:10,570 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 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 60 [2021-11-07 02:20:10,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:10,645 INFO L225 Difference]: With dead ends: 36983 [2021-11-07 02:20:10,646 INFO L226 Difference]: Without dead ends: 29939 [2021-11-07 02:20:10,662 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-11-07 02:20:10,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29939 states. [2021-11-07 02:20:11,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29939 to 7116. [2021-11-07 02:20:11,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7116 states, 7048 states have (on average 1.3741486946651533) internal successors, (9685), 7098 states have internal predecessors, (9685), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-07 02:20:11,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7116 states to 7116 states and 9713 transitions. [2021-11-07 02:20:11,486 INFO L78 Accepts]: Start accepts. Automaton has 7116 states and 9713 transitions. Word has length 60 [2021-11-07 02:20:11,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:11,487 INFO L470 AbstractCegarLoop]: Abstraction has 7116 states and 9713 transitions. [2021-11-07 02:20:11,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 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 02:20:11,487 INFO L276 IsEmpty]: Start isEmpty. Operand 7116 states and 9713 transitions. [2021-11-07 02:20:11,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 02:20:11,492 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:11,493 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:11,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:11,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:11,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:11,911 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~TO~VOIDErr1ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~TO~VOIDErr2ASSERT_VIOLATIONERROR_FUNCTION (and 117 more)] === [2021-11-07 02:20:11,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:11,911 INFO L85 PathProgramCache]: Analyzing trace with hash 2137309087, now seen corresponding path program 1 times [2021-11-07 02:20:11,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:11,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [140929878] [2021-11-07 02:20:11,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:11,913 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:11,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:11,914 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:11,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:20:14,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:14,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 1538 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:20:14,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:14,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:14,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:15,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:15,215 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:15,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [140929878] [2021-11-07 02:20:15,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [140929878] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:20:15,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [429540797] [2021-11-07 02:20:15,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:15,215 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:20:15,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:20:15,216 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:20:15,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 02:20:16,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:17,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 1538 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 02:20:17,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:17,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:20:17,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:17,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:20:17,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [429540797] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:17,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:20:17,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-07 02:20:17,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339009340] [2021-11-07 02:20:17,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:20:17,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:17,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:20:17,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:20:17,861 INFO L87 Difference]: Start difference. First operand 7116 states and 9713 transitions. Second operand has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 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 02:20:23,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:23,283 INFO L93 Difference]: Finished difference Result 16789 states and 23102 transitions. [2021-11-07 02:20:23,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:20:23,284 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 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 02:20:23,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:23,327 INFO L225 Difference]: With dead ends: 16789 [2021-11-07 02:20:23,327 INFO L226 Difference]: Without dead ends: 16771 [2021-11-07 02:20:23,331 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-11-07 02:20:23,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16771 states. [2021-11-07 02:20:24,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16771 to 7098. [2021-11-07 02:20:24,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7098 states, 7039 states have (on average 1.37221196192641) internal successors, (9659), 7080 states have internal predecessors, (9659), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-07 02:20:24,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7098 states to 7098 states and 9687 transitions. [2021-11-07 02:20:24,379 INFO L78 Accepts]: Start accepts. Automaton has 7098 states and 9687 transitions. Word has length 62 [2021-11-07 02:20:24,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:24,380 INFO L470 AbstractCegarLoop]: Abstraction has 7098 states and 9687 transitions. [2021-11-07 02:20:24,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 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 02:20:24,380 INFO L276 IsEmpty]: Start isEmpty. Operand 7098 states and 9687 transitions. [2021-11-07 02:20:24,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 02:20:24,385 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:24,385 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:24,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:24,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:24,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:20:24,803 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~TO~VOIDErr1ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~TO~VOIDErr2ASSERT_VIOLATIONERROR_FUNCTION (and 117 more)] === [2021-11-07 02:20:24,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:24,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1780072352, now seen corresponding path program 1 times [2021-11-07 02:20:24,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:24,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1763255686] [2021-11-07 02:20:24,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:24,806 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:24,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:24,807 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:24,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:20:27,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:27,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 1613 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:20:27,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:27,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:27,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:28,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:28,342 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:28,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1763255686] [2021-11-07 02:20:28,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1763255686] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:20:28,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1632574460] [2021-11-07 02:20:28,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:28,343 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:20:28,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:20:28,344 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:20:28,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 02:20:30,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:30,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 1613 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 02:20:30,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:30,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:20:30,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:31,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:20:31,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1632574460] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:31,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:20:31,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [5, 5] total 15 [2021-11-07 02:20:31,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928391561] [2021-11-07 02:20:31,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 02:20:31,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:31,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 02:20:31,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:20:31,311 INFO L87 Difference]: Start difference. First operand 7098 states and 9687 transitions. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 02:20:56,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:56,718 INFO L93 Difference]: Finished difference Result 37783 states and 51816 transitions. [2021-11-07 02:20:56,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 02:20:56,720 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 63 [2021-11-07 02:20:56,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:56,792 INFO L225 Difference]: With dead ends: 37783 [2021-11-07 02:20:56,792 INFO L226 Difference]: Without dead ends: 30706 [2021-11-07 02:20:56,810 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2021-11-07 02:20:56,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30706 states. [2021-11-07 02:20:57,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30706 to 7149. [2021-11-07 02:20:57,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7149 states, 7090 states have (on average 1.369534555712271) internal successors, (9710), 7131 states have internal predecessors, (9710), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-07 02:20:57,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7149 states to 7149 states and 9738 transitions. [2021-11-07 02:20:57,789 INFO L78 Accepts]: Start accepts. Automaton has 7149 states and 9738 transitions. Word has length 63 [2021-11-07 02:20:57,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:57,789 INFO L470 AbstractCegarLoop]: Abstraction has 7149 states and 9738 transitions. [2021-11-07 02:20:57,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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 02:20:57,790 INFO L276 IsEmpty]: Start isEmpty. Operand 7149 states and 9738 transitions. [2021-11-07 02:20:57,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 02:20:57,795 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:57,796 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:57,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-07 02:20:58,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-07 02:20:58,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:58,217 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~TO~VOIDErr1ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~TO~VOIDErr2ASSERT_VIOLATIONERROR_FUNCTION (and 117 more)] === [2021-11-07 02:20:58,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:58,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1515575764, now seen corresponding path program 1 times [2021-11-07 02:20:58,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:58,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [179422430] [2021-11-07 02:20:58,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:58,219 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:58,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:58,220 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:58,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 02:21:00,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:00,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 1632 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:21:00,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:01,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:01,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:01,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:01,753 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:01,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [179422430] [2021-11-07 02:21:01,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [179422430] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:21:01,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1692687909] [2021-11-07 02:21:01,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:01,754 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:21:01,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:21:01,755 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:21:01,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 02:21:03,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:03,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 1632 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 02:21:03,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:04,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:21:04,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:04,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:21:04,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1692687909] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:04,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:21:04,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-07 02:21:04,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598184810] [2021-11-07 02:21:04,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:21:04,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:04,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:21:04,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:21:04,627 INFO L87 Difference]: Start difference. First operand 7149 states and 9738 transitions. Second operand has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 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 02:21:10,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:10,023 INFO L93 Difference]: Finished difference Result 16294 states and 22404 transitions. [2021-11-07 02:21:10,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:21:10,024 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 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 66 [2021-11-07 02:21:10,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:10,051 INFO L225 Difference]: With dead ends: 16294 [2021-11-07 02:21:10,052 INFO L226 Difference]: Without dead ends: 16276 [2021-11-07 02:21:10,057 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-11-07 02:21:10,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16276 states. [2021-11-07 02:21:11,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16276 to 7131. [2021-11-07 02:21:11,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7131 states, 7081 states have (on average 1.367603445840983) internal successors, (9684), 7113 states have internal predecessors, (9684), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-07 02:21:11,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7131 states to 7131 states and 9712 transitions. [2021-11-07 02:21:11,265 INFO L78 Accepts]: Start accepts. Automaton has 7131 states and 9712 transitions. Word has length 66 [2021-11-07 02:21:11,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:11,265 INFO L470 AbstractCegarLoop]: Abstraction has 7131 states and 9712 transitions. [2021-11-07 02:21:11,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 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 02:21:11,266 INFO L276 IsEmpty]: Start isEmpty. Operand 7131 states and 9712 transitions. [2021-11-07 02:21:11,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-07 02:21:11,277 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:11,278 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:21:11,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:11,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:11,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:11,691 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION === [##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~TO~VOIDErr1ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~TO~VOIDErr2ASSERT_VIOLATIONERROR_FUNCTION (and 117 more)] === [2021-11-07 02:21:11,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:11,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1736745063, now seen corresponding path program 1 times [2021-11-07 02:21:11,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:11,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [587045882] [2021-11-07 02:21:11,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:11,694 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:11,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:11,699 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:11,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 02:21:14,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:14,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 1821 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:21:14,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:15,084 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:21:15,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:15,730 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:21:15,730 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:15,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [587045882] [2021-11-07 02:21:15,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [587045882] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:21:15,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1471764365] [2021-11-07 02:21:15,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:15,731 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:21:15,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:21:15,732 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:21:15,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-07 02:21:17,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:17,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 1821 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:21:17,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:18,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:21:18,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:18,593 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:21:18,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1471764365] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:18,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:21:18,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 02:21:18,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398107289] [2021-11-07 02:21:18,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:21:18,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:18,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:21:18,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:21:18,594 INFO L87 Difference]: Start difference. First operand 7131 states and 9712 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:19,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:19,935 INFO L93 Difference]: Finished difference Result 18363 states and 25032 transitions. [2021-11-07 02:21:19,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:21:19,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-11-07 02:21:19,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:19,955 INFO L225 Difference]: With dead ends: 18363 [2021-11-07 02:21:19,955 INFO L226 Difference]: Without dead ends: 11253 [2021-11-07 02:21:19,971 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 385 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:21:19,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11253 states. [2021-11-07 02:21:21,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11253 to 11191. [2021-11-07 02:21:21,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11191 states, 11123 states have (on average 1.3715724175132609) internal successors, (15256), 11158 states have internal predecessors, (15256), 26 states have call successors, (26), 12 states have call predecessors, (26), 12 states have return successors, (26), 22 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-07 02:21:21,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11191 states to 11191 states and 15308 transitions. [2021-11-07 02:21:21,446 INFO L78 Accepts]: Start accepts. Automaton has 11191 states and 15308 transitions. Word has length 99 [2021-11-07 02:21:21,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:21,447 INFO L470 AbstractCegarLoop]: Abstraction has 11191 states and 15308 transitions. [2021-11-07 02:21:21,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:21,447 INFO L276 IsEmpty]: Start isEmpty. Operand 11191 states and 15308 transitions. [2021-11-07 02:21:21,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-07 02:21:21,463 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:21,464 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:21:21,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:21,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-07 02:21:21,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:21,882 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION === [##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~TO~VOIDErr1ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~TO~VOIDErr2ASSERT_VIOLATIONERROR_FUNCTION (and 117 more)] === [2021-11-07 02:21:21,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:21,882 INFO L85 PathProgramCache]: Analyzing trace with hash 654654449, now seen corresponding path program 1 times [2021-11-07 02:21:21,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:21,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1900997541] [2021-11-07 02:21:21,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:21,884 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:21,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:21,885 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:21,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 02:21:25,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:25,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 1895 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:21:25,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:25,725 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:21:25,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:26,580 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:21:26,581 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:26,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1900997541] [2021-11-07 02:21:26,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1900997541] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:21:26,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1528889823] [2021-11-07 02:21:26,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:26,581 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:21:26,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:21:26,582 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:21:26,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-07 02:21:28,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:28,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 1895 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:21:28,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:29,314 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:21:29,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:29,625 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:21:29,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1528889823] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:29,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:21:29,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 02:21:29,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142353936] [2021-11-07 02:21:29,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:21:29,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:29,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:21:29,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:21:29,629 INFO L87 Difference]: Start difference. First operand 11191 states and 15308 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:33,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:33,705 INFO L93 Difference]: Finished difference Result 30655 states and 41888 transitions. [2021-11-07 02:21:33,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:21:33,706 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-11-07 02:21:33,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:33,732 INFO L225 Difference]: With dead ends: 30655 [2021-11-07 02:21:33,732 INFO L226 Difference]: Without dead ends: 19485 [2021-11-07 02:21:33,751 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:21:33,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19485 states. [2021-11-07 02:21:35,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19485 to 11197. [2021-11-07 02:21:35,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11197 states, 11129 states have (on average 1.371372090933597) internal successors, (15262), 11164 states have internal predecessors, (15262), 26 states have call successors, (26), 12 states have call predecessors, (26), 12 states have return successors, (26), 22 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-07 02:21:35,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11197 states to 11197 states and 15314 transitions. [2021-11-07 02:21:35,203 INFO L78 Accepts]: Start accepts. Automaton has 11197 states and 15314 transitions. Word has length 116 [2021-11-07 02:21:35,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:35,204 INFO L470 AbstractCegarLoop]: Abstraction has 11197 states and 15314 transitions. [2021-11-07 02:21:35,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:35,204 INFO L276 IsEmpty]: Start isEmpty. Operand 11197 states and 15314 transitions. [2021-11-07 02:21:35,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-07 02:21:35,214 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:35,214 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:21:35,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2021-11-07 02:21:35,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:35,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:35,627 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION === [##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~TO~VOIDErr1ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~TO~VOIDErr2ASSERT_VIOLATIONERROR_FUNCTION (and 117 more)] === [2021-11-07 02:21:35,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:35,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1026874190, now seen corresponding path program 1 times [2021-11-07 02:21:35,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:35,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1800844238] [2021-11-07 02:21:35,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:35,630 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:35,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:35,631 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:35,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 02:21:38,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:38,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 1891 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:21:38,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:39,523 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:21:39,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:40,233 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:21:40,233 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:40,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1800844238] [2021-11-07 02:21:40,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1800844238] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:21:40,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1852002031] [2021-11-07 02:21:40,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:40,234 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:21:40,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:21:40,242 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:21:40,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-07 02:21:42,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:42,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 1891 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:21:42,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:43,182 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:21:43,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:43,542 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:21:43,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1852002031] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:43,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:21:43,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 02:21:43,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729770361] [2021-11-07 02:21:43,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:21:43,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:43,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:21:43,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:21:43,545 INFO L87 Difference]: Start difference. First operand 11197 states and 15314 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:46,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:46,913 INFO L93 Difference]: Finished difference Result 38951 states and 53182 transitions. [2021-11-07 02:21:46,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:21:46,915 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-11-07 02:21:46,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:46,963 INFO L225 Difference]: With dead ends: 38951 [2021-11-07 02:21:46,963 INFO L226 Difference]: Without dead ends: 27775 [2021-11-07 02:21:46,979 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:21:47,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27775 states. [2021-11-07 02:21:48,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27775 to 11201. [2021-11-07 02:21:48,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11201 states, 11133 states have (on average 1.371238659840115) internal successors, (15266), 11168 states have internal predecessors, (15266), 26 states have call successors, (26), 12 states have call predecessors, (26), 12 states have return successors, (26), 22 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-07 02:21:48,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11201 states to 11201 states and 15318 transitions. [2021-11-07 02:21:48,340 INFO L78 Accepts]: Start accepts. Automaton has 11201 states and 15318 transitions. Word has length 116 [2021-11-07 02:21:48,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:48,341 INFO L470 AbstractCegarLoop]: Abstraction has 11201 states and 15318 transitions. [2021-11-07 02:21:48,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:48,341 INFO L276 IsEmpty]: Start isEmpty. Operand 11201 states and 15318 transitions. [2021-11-07 02:21:48,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-07 02:21:48,350 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:48,350 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:21:48,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:48,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:48,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:48,767 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION === [##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~TO~VOIDErr1ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~TO~VOIDErr2ASSERT_VIOLATIONERROR_FUNCTION (and 117 more)] === [2021-11-07 02:21:48,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:48,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1887319662, now seen corresponding path program 1 times [2021-11-07 02:21:48,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:48,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510182839] [2021-11-07 02:21:48,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:48,770 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:48,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:48,773 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:48,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 02:21:52,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:52,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 1967 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:21:52,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:53,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:21:53,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:53,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:21:53,818 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:53,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1510182839] [2021-11-07 02:21:53,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1510182839] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:21:53,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [905201159] [2021-11-07 02:21:53,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:53,819 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:21:53,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:21:53,820 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:21:53,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-07 02:21:56,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:56,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 1967 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:21:56,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:57,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:21:57,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:57,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:21:57,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [905201159] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:57,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:21:57,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-07 02:21:57,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371508399] [2021-11-07 02:21:57,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:21:57,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:57,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:21:57,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:21:57,588 INFO L87 Difference]: Start difference. First operand 11201 states and 15318 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 1 states have call successors, (4), 1 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:02,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:02,211 INFO L93 Difference]: Finished difference Result 30693 states and 42002 transitions. [2021-11-07 02:22:02,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:22:02,212 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 1 states have call successors, (4), 1 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-11-07 02:22:02,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:02,246 INFO L225 Difference]: With dead ends: 30693 [2021-11-07 02:22:02,246 INFO L226 Difference]: Without dead ends: 19513 [2021-11-07 02:22:02,260 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 508 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:22:02,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19513 states. [2021-11-07 02:22:04,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19513 to 19389. [2021-11-07 02:22:04,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19389 states, 19285 states have (on average 1.3748509204044594) internal successors, (26514), 19326 states have internal predecessors, (26514), 50 states have call successors, (50), 24 states have call predecessors, (50), 24 states have return successors, (50), 42 states have call predecessors, (50), 50 states have call successors, (50) [2021-11-07 02:22:04,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19389 states to 19389 states and 26614 transitions. [2021-11-07 02:22:04,307 INFO L78 Accepts]: Start accepts. Automaton has 19389 states and 26614 transitions. Word has length 130 [2021-11-07 02:22:04,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:04,307 INFO L470 AbstractCegarLoop]: Abstraction has 19389 states and 26614 transitions. [2021-11-07 02:22:04,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 1 states have call successors, (4), 1 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:04,307 INFO L276 IsEmpty]: Start isEmpty. Operand 19389 states and 26614 transitions. [2021-11-07 02:22:04,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-07 02:22:04,326 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:04,326 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:22:04,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:04,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:04,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:04,730 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION === [##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~TO~VOIDErr1ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~TO~VOIDErr2ASSERT_VIOLATIONERROR_FUNCTION (and 117 more)] === [2021-11-07 02:22:04,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:04,731 INFO L85 PathProgramCache]: Analyzing trace with hash 948959458, now seen corresponding path program 1 times [2021-11-07 02:22:04,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:04,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [305466189] [2021-11-07 02:22:04,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:04,733 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:04,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:04,734 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:04,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-07 02:22:08,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:08,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 1943 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:22:08,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:08,793 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:22:08,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:09,576 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:22:09,576 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:09,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [305466189] [2021-11-07 02:22:09,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [305466189] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:22:09,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2059951875] [2021-11-07 02:22:09,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:09,577 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:22:09,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:22:09,578 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:22:09,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-07 02:22:12,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:12,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 1943 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:22:12,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:12,891 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:22:12,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:13,534 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:22:13,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2059951875] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:13,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:22:13,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-07 02:22:13,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308109824] [2021-11-07 02:22:13,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:22:13,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:13,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:22:13,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:22:13,536 INFO L87 Difference]: Start difference. First operand 19389 states and 26614 transitions. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:35,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:35,637 INFO L93 Difference]: Finished difference Result 151235 states and 206650 transitions. [2021-11-07 02:22:35,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 02:22:35,638 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-11-07 02:22:35,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:35,876 INFO L225 Difference]: With dead ends: 151235 [2021-11-07 02:22:35,876 INFO L226 Difference]: Without dead ends: 131867 [2021-11-07 02:22:35,917 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 528 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-11-07 02:22:36,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131867 states. [2021-11-07 02:22:39,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131867 to 19397. [2021-11-07 02:22:39,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19397 states, 19293 states have (on average 1.3746954854092157) internal successors, (26522), 19334 states have internal predecessors, (26522), 50 states have call successors, (50), 24 states have call predecessors, (50), 24 states have return successors, (50), 42 states have call predecessors, (50), 50 states have call successors, (50) [2021-11-07 02:22:39,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19397 states to 19397 states and 26622 transitions. [2021-11-07 02:22:39,691 INFO L78 Accepts]: Start accepts. Automaton has 19397 states and 26622 transitions. Word has length 135 [2021-11-07 02:22:39,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:39,691 INFO L470 AbstractCegarLoop]: Abstraction has 19397 states and 26622 transitions. [2021-11-07 02:22:39,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:39,691 INFO L276 IsEmpty]: Start isEmpty. Operand 19397 states and 26622 transitions. [2021-11-07 02:22:39,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-07 02:22:39,707 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:39,707 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:22:39,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:39,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2021-11-07 02:22:40,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:22:40,108 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION === [##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~TO~VOIDErr1ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~TO~VOIDErr2ASSERT_VIOLATIONERROR_FUNCTION (and 117 more)] === [2021-11-07 02:22:40,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:40,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1473003920, now seen corresponding path program 1 times [2021-11-07 02:22:40,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:40,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [94779801] [2021-11-07 02:22:40,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:40,111 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:40,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:40,112 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:40,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-07 02:22:43,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:43,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 1971 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:22:43,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:44,380 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:22:44,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:45,177 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:22:45,178 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:45,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [94779801] [2021-11-07 02:22:45,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [94779801] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:22:45,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1580408012] [2021-11-07 02:22:45,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:45,179 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:22:45,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:22:45,186 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:22:45,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-07 02:22:47,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:48,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 1971 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:22:48,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:48,591 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:22:48,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:49,083 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:22:49,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1580408012] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:49,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:22:49,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 02:22:49,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906869967] [2021-11-07 02:22:49,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:22:49,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:49,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:22:49,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:22:49,085 INFO L87 Difference]: Start difference. First operand 19397 states and 26622 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:52,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:52,268 INFO L93 Difference]: Finished difference Result 38789 states and 53242 transitions. [2021-11-07 02:22:52,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:22:52,268 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-07 02:22:52,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:52,297 INFO L225 Difference]: With dead ends: 38789 [2021-11-07 02:22:52,297 INFO L226 Difference]: Without dead ends: 19413 [2021-11-07 02:22:52,312 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 560 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:22:52,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19413 states. [2021-11-07 02:22:54,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19413 to 19405. [2021-11-07 02:22:54,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19405 states, 19301 states have (on average 1.3745401792653231) internal successors, (26530), 19342 states have internal predecessors, (26530), 50 states have call successors, (50), 24 states have call predecessors, (50), 24 states have return successors, (50), 42 states have call predecessors, (50), 50 states have call successors, (50) [2021-11-07 02:22:55,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19405 states to 19405 states and 26630 transitions. [2021-11-07 02:22:55,000 INFO L78 Accepts]: Start accepts. Automaton has 19405 states and 26630 transitions. Word has length 143 [2021-11-07 02:22:55,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:55,001 INFO L470 AbstractCegarLoop]: Abstraction has 19405 states and 26630 transitions. [2021-11-07 02:22:55,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:55,001 INFO L276 IsEmpty]: Start isEmpty. Operand 19405 states and 26630 transitions. [2021-11-07 02:22:55,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-07 02:22:55,018 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:55,018 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:22:55,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-11-07 02:22:55,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:55,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:22:55,439 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION === [##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~TO~VOIDErr1ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~TO~VOIDErr2ASSERT_VIOLATIONERROR_FUNCTION (and 117 more)] === [2021-11-07 02:22:55,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:55,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1527396818, now seen corresponding path program 1 times [2021-11-07 02:22:55,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:55,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [901098783] [2021-11-07 02:22:55,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:55,443 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:55,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:55,444 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:55,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-07 02:22:59,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:59,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 1969 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:22:59,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:59,935 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:22:59,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:00,822 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:23:00,823 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:00,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [901098783] [2021-11-07 02:23:00,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [901098783] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:23:00,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [513521032] [2021-11-07 02:23:00,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:00,823 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:23:00,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:23:00,824 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:23:00,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-07 02:23:03,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:03,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 1969 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:23:03,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:04,601 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:23:04,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:05,083 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:23:05,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [513521032] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:05,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:23:05,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 12 [2021-11-07 02:23:05,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544625673] [2021-11-07 02:23:05,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:23:05,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:05,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:23:05,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:23:05,086 INFO L87 Difference]: Start difference. First operand 19405 states and 26630 transitions. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:16,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:16,237 INFO L93 Difference]: Finished difference Result 81163 states and 111044 transitions. [2021-11-07 02:23:16,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 02:23:16,238 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-07 02:23:16,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:16,324 INFO L225 Difference]: With dead ends: 81163 [2021-11-07 02:23:16,324 INFO L226 Difference]: Without dead ends: 61779 [2021-11-07 02:23:16,343 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 559 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-11-07 02:23:16,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61779 states. [2021-11-07 02:23:19,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61779 to 19417. [2021-11-07 02:23:19,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19417 states, 19313 states have (on average 1.3743074612955004) internal successors, (26542), 19354 states have internal predecessors, (26542), 50 states have call successors, (50), 24 states have call predecessors, (50), 24 states have return successors, (50), 42 states have call predecessors, (50), 50 states have call successors, (50) [2021-11-07 02:23:19,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19417 states to 19417 states and 26642 transitions. [2021-11-07 02:23:19,163 INFO L78 Accepts]: Start accepts. Automaton has 19417 states and 26642 transitions. Word has length 143 [2021-11-07 02:23:19,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:19,163 INFO L470 AbstractCegarLoop]: Abstraction has 19417 states and 26642 transitions. [2021-11-07 02:23:19,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:19,163 INFO L276 IsEmpty]: Start isEmpty. Operand 19417 states and 26642 transitions. [2021-11-07 02:23:19,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-07 02:23:19,175 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:19,175 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:23:19,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:19,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:19,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:19,576 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION === [##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~TO~VOIDErr1ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~TO~VOIDErr2ASSERT_VIOLATIONERROR_FUNCTION (and 117 more)] === [2021-11-07 02:23:19,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:19,576 INFO L85 PathProgramCache]: Analyzing trace with hash -741036494, now seen corresponding path program 1 times [2021-11-07 02:23:19,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:19,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [654935693] [2021-11-07 02:23:19,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:19,578 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:19,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:19,579 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:19,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-07 02:23:23,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:23,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 1973 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:23:23,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:24,038 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:23:24,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:24,914 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:23:24,915 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:24,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [654935693] [2021-11-07 02:23:24,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [654935693] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:23:24,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [683804851] [2021-11-07 02:23:24,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:24,915 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:23:24,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:23:24,916 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:23:24,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-07 02:23:28,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:28,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 1973 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:23:28,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:28,849 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:23:28,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:29,589 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:23:29,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [683804851] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:29,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:23:29,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-07 02:23:29,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77404322] [2021-11-07 02:23:29,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:23:29,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:29,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:23:29,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:23:29,592 INFO L87 Difference]: Start difference. First operand 19417 states and 26642 transitions. Second operand has 8 states, 8 states have (on average 24.875) internal successors, (199), 8 states have internal predecessors, (199), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:38,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:38,342 INFO L93 Difference]: Finished difference Result 53869 states and 73738 transitions. [2021-11-07 02:23:38,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 02:23:38,344 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 24.875) internal successors, (199), 8 states have internal predecessors, (199), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-07 02:23:38,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:38,391 INFO L225 Difference]: With dead ends: 53869 [2021-11-07 02:23:38,392 INFO L226 Difference]: Without dead ends: 34473 [2021-11-07 02:23:38,411 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 559 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2021-11-07 02:23:38,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34473 states. [2021-11-07 02:23:41,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34473 to 19421. [2021-11-07 02:23:41,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19421 states, 19317 states have (on average 1.3742299528912356) internal successors, (26546), 19358 states have internal predecessors, (26546), 50 states have call successors, (50), 24 states have call predecessors, (50), 24 states have return successors, (50), 42 states have call predecessors, (50), 50 states have call successors, (50) [2021-11-07 02:23:41,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19421 states to 19421 states and 26646 transitions. [2021-11-07 02:23:41,294 INFO L78 Accepts]: Start accepts. Automaton has 19421 states and 26646 transitions. Word has length 143 [2021-11-07 02:23:41,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:41,294 INFO L470 AbstractCegarLoop]: Abstraction has 19421 states and 26646 transitions. [2021-11-07 02:23:41,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.875) internal successors, (199), 8 states have internal predecessors, (199), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:41,294 INFO L276 IsEmpty]: Start isEmpty. Operand 19421 states and 26646 transitions. [2021-11-07 02:23:41,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-07 02:23:41,298 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:41,298 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:23:41,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:41,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:41,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:23:41,699 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION === [##fun~$Pointer$~TO~VOIDErr0ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~TO~VOIDErr1ASSERT_VIOLATIONERROR_FUNCTION, ##fun~$Pointer$~TO~VOIDErr2ASSERT_VIOLATIONERROR_FUNCTION (and 117 more)] === [2021-11-07 02:23:41,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:41,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1708563636, now seen corresponding path program 1 times [2021-11-07 02:23:41,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:41,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [132496186] [2021-11-07 02:23:41,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:41,702 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:41,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:41,703 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:41,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-07 02:23:45,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:45,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 1971 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:23:45,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:46,327 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:23:46,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:47,211 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:23:47,211 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:47,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [132496186] [2021-11-07 02:23:47,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [132496186] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:23:47,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1074449025] [2021-11-07 02:23:47,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:47,212 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:23:47,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:23:47,213 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:23:47,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dee6610-957a-4db6-9c7f-5594182ce7db/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-07 02:23:50,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:50,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 1971 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 02:23:50,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:51,240 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:23:51,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:51,878 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:23:51,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1074449025] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:51,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:23:51,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [5, 5] total 15 [2021-11-07 02:23:51,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732161088] [2021-11-07 02:23:51,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 02:23:51,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:51,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 02:23:51,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:23:51,880 INFO L87 Difference]: Start difference. First operand 19421 states and 26646 transitions. Second operand has 9 states, 9 states have (on average 17.444444444444443) internal successors, (157), 9 states have internal predecessors, (157), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)