./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--gadget--udc--gr_udc.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_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/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_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/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--gadget--udc--gr_udc.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/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_1b043de3-bd6d-4a9c-9ad4-c5503e509161/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 6932181a2a9c8d4d7c700844e1db6a95829edf2ea099e17754a10b04a114b5cd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:48:55,470 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:48:55,474 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:48:55,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:48:55,530 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:48:55,535 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:48:55,537 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:48:55,541 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:48:55,545 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:48:55,551 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:48:55,553 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:48:55,555 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:48:55,556 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:48:55,559 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:48:55,561 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:48:55,566 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:48:55,568 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:48:55,569 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:48:55,572 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:48:55,581 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:48:55,584 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:48:55,586 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:48:55,590 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:48:55,591 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:48:55,598 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:48:55,599 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:48:55,599 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:48:55,600 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:48:55,601 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:48:55,602 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:48:55,603 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:48:55,604 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:48:55,605 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:48:55,606 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:48:55,607 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:48:55,607 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:48:55,608 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:48:55,608 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:48:55,609 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:48:55,610 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:48:55,610 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:48:55,611 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 01:48:55,655 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:48:55,655 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:48:55,656 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:48:55,657 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:48:55,657 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:48:55,657 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:48:55,658 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:48:55,658 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:48:55,665 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:48:55,665 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:48:55,666 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:48:55,666 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:48:55,667 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:48:55,667 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:48:55,667 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:48:55,668 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:48:55,668 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:48:55,668 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:48:55,669 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:48:55,669 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:48:55,669 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:48:55,669 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:48:55,670 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:48:55,670 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:48:55,670 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:48:55,670 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:48:55,671 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:48:55,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:48:55,671 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:48:55,673 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:48:55,673 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:48:55,673 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:48:55,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:48:55,674 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:48:55,674 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:48:55,674 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:48:55,675 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_1b043de3-bd6d-4a9c-9ad4-c5503e509161/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6932181a2a9c8d4d7c700844e1db6a95829edf2ea099e17754a10b04a114b5cd [2021-11-07 01:48:56,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:48:56,057 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:48:56,060 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:48:56,062 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:48:56,063 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:48:56,064 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--gadget--udc--gr_udc.ko-entry_point.cil.out.i [2021-11-07 01:48:56,134 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/data/5858ef927/90c3955993d44daaa00f24076e6f6490/FLAG79bf24628 [2021-11-07 01:48:57,010 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:48:57,012 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--gadget--udc--gr_udc.ko-entry_point.cil.out.i [2021-11-07 01:48:57,062 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/data/5858ef927/90c3955993d44daaa00f24076e6f6490/FLAG79bf24628 [2021-11-07 01:48:57,478 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/data/5858ef927/90c3955993d44daaa00f24076e6f6490 [2021-11-07 01:48:57,480 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:48:57,482 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:48:57,483 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:48:57,483 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:48:57,487 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:48:57,488 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:48:57" (1/1) ... [2021-11-07 01:48:57,489 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a376d63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:57, skipping insertion in model container [2021-11-07 01:48:57,489 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:48:57" (1/1) ... [2021-11-07 01:48:57,496 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:48:57,618 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:48:58,809 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:48:58,837 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:48:58,872 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:48:59,121 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:48:59,131 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:48:59,259 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:48:59,269 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:48:59,282 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:48:59,353 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:48:59,354 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:48:59,357 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:48:59,380 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:48:59,380 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:48:59,381 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:48:59,387 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:48:59,387 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:48:59,388 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 01:48:59,456 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_1b043de3-bd6d-4a9c-9ad4-c5503e509161/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--gadget--udc--gr_udc.ko-entry_point.cil.out.i[213066,213079] [2021-11-07 01:48:59,521 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:48:59,582 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:48:59,583 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5dd05922 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:59, skipping insertion in model container [2021-11-07 01:48:59,583 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:48:59,583 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:48:59,586 INFO L168 Benchmark]: Toolchain (without parser) took 2102.53 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 61.7 MB in the beginning and 62.4 MB in the end (delta: -663.7 kB). Peak memory consumption was 37.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:48:59,587 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 92.3 MB. Free memory was 68.1 MB in the beginning and 68.0 MB in the end (delta: 42.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:48:59,588 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2100.08 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 61.5 MB in the beginning and 62.4 MB in the end (delta: -877.9 kB). Peak memory consumption was 37.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:48:59,590 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 92.3 MB. Free memory was 68.1 MB in the beginning and 68.0 MB in the end (delta: 42.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 2100.08 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 61.5 MB in the beginning and 62.4 MB in the end (delta: -877.9 kB). Peak memory consumption was 37.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3963]: 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_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/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_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/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--gadget--udc--gr_udc.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/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_1b043de3-bd6d-4a9c-9ad4-c5503e509161/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 6932181a2a9c8d4d7c700844e1db6a95829edf2ea099e17754a10b04a114b5cd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:49:01,816 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:49:01,819 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:49:01,868 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:49:01,869 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:49:01,873 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:49:01,876 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:49:01,884 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:49:01,888 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:49:01,896 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:49:01,898 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:49:01,900 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:49:01,900 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:49:01,903 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:49:01,906 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:49:01,911 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:49:01,913 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:49:01,914 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:49:01,916 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:49:01,924 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:49:01,926 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:49:01,928 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:49:01,930 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:49:01,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:49:01,943 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:49:01,944 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:49:01,944 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:49:01,946 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:49:01,947 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:49:01,948 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:49:01,949 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:49:01,951 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:49:01,953 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:49:01,954 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:49:01,955 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:49:01,956 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:49:01,957 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:49:01,957 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:49:01,957 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:49:01,959 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:49:01,960 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:49:01,961 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 01:49:02,011 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:49:02,011 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:49:02,013 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:49:02,013 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:49:02,013 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:49:02,014 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:49:02,014 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:49:02,014 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:49:02,014 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:49:02,016 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:49:02,017 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:49:02,017 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:49:02,018 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:49:02,018 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:49:02,018 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:49:02,018 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:49:02,019 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:49:02,019 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:49:02,019 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:49:02,019 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:49:02,020 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:49:02,020 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:49:02,020 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:49:02,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:49:02,021 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:49:02,021 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:49:02,021 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:49:02,021 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:49:02,022 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:49:02,022 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:49:02,022 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:49:02,022 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:49:02,023 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_1b043de3-bd6d-4a9c-9ad4-c5503e509161/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6932181a2a9c8d4d7c700844e1db6a95829edf2ea099e17754a10b04a114b5cd [2021-11-07 01:49:02,435 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:49:02,456 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:49:02,459 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:49:02,460 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:49:02,461 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:49:02,462 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--gadget--udc--gr_udc.ko-entry_point.cil.out.i [2021-11-07 01:49:02,536 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/data/4aa2d7710/ba603f24a1a04752ab5127fdcc407bb6/FLAGb0301ff9c [2021-11-07 01:49:03,462 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:49:03,462 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--gadget--udc--gr_udc.ko-entry_point.cil.out.i [2021-11-07 01:49:03,522 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/data/4aa2d7710/ba603f24a1a04752ab5127fdcc407bb6/FLAGb0301ff9c [2021-11-07 01:49:03,928 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/data/4aa2d7710/ba603f24a1a04752ab5127fdcc407bb6 [2021-11-07 01:49:03,932 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:49:03,934 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:49:03,937 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:49:03,938 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:49:03,941 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:49:03,942 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:49:03" (1/1) ... [2021-11-07 01:49:03,943 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b638700 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:03, skipping insertion in model container [2021-11-07 01:49:03,943 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:49:03" (1/1) ... [2021-11-07 01:49:03,950 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:49:04,101 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:49:06,075 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_1b043de3-bd6d-4a9c-9ad4-c5503e509161/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--gadget--udc--gr_udc.ko-entry_point.cil.out.i[213066,213079] [2021-11-07 01:49:06,119 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:49:06,164 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:49:06,220 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:49:06,553 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_1b043de3-bd6d-4a9c-9ad4-c5503e509161/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--gadget--udc--gr_udc.ko-entry_point.cil.out.i[213066,213079] [2021-11-07 01:49:06,565 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:49:06,593 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:49:07,025 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_1b043de3-bd6d-4a9c-9ad4-c5503e509161/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--gadget--udc--gr_udc.ko-entry_point.cil.out.i[213066,213079] [2021-11-07 01:49:07,032 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:49:07,186 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:49:07,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:07 WrapperNode [2021-11-07 01:49:07,187 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:49:07,188 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:49:07,188 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:49:07,189 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:49:07,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:07" (1/1) ... [2021-11-07 01:49:07,323 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:07" (1/1) ... [2021-11-07 01:49:08,537 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:49:08,538 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:49:08,538 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:49:08,538 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:49:08,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:07" (1/1) ... [2021-11-07 01:49:08,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:07" (1/1) ... [2021-11-07 01:49:09,085 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:07" (1/1) ... [2021-11-07 01:49:09,086 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:07" (1/1) ... [2021-11-07 01:49:10,056 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:07" (1/1) ... [2021-11-07 01:49:10,208 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:07" (1/1) ... [2021-11-07 01:49:10,288 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:07" (1/1) ... [2021-11-07 01:49:10,621 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:49:10,623 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:49:10,624 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:49:10,624 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:49:10,625 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:07" (1/1) ... [2021-11-07 01:49:10,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:49:10,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:49:10,671 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:49:10,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:49:10,723 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 01:49:10,723 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 01:49:10,724 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:49:10,724 INFO L130 BoogieDeclarations]: Found specification of procedure gr_finish_request [2021-11-07 01:49:10,724 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_finish_request [2021-11-07 01:49:10,724 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 01:49:10,724 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-07 01:49:10,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 01:49:10,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:49:10,725 INFO L130 BoogieDeclarations]: Found specification of procedure gr_dequeue [2021-11-07 01:49:10,725 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_dequeue [2021-11-07 01:49:10,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:49:10,725 INFO L130 BoogieDeclarations]: Found specification of procedure gr_ep0_setup [2021-11-07 01:49:10,725 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_ep0_setup [2021-11-07 01:49:10,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 01:49:10,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-07 01:49:10,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:49:10,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:49:10,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 01:49:10,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:49:10,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 01:49:10,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-07 01:49:10,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-07 01:49:10,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-07 01:49:10,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-07 01:49:10,727 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2021-11-07 01:49:10,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2021-11-07 01:49:10,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:49:10,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:49:10,728 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-07 01:49:10,728 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-07 01:49:10,728 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-07 01:49:10,729 INFO L130 BoogieDeclarations]: Found specification of procedure gr_dma_advance [2021-11-07 01:49:10,729 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_dma_advance [2021-11-07 01:49:10,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-07 01:49:10,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:49:10,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:53:09,390 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:53:09,391 INFO L299 CfgBuilder]: Removed 6866 assume(true) statements. [2021-11-07 01:53:09,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:53:09 BoogieIcfgContainer [2021-11-07 01:53:09,400 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:53:09,402 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:53:09,402 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:53:09,405 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:53:09,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:49:03" (1/3) ... [2021-11-07 01:53:09,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50e4d787 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:53:09, skipping insertion in model container [2021-11-07 01:53:09,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:07" (2/3) ... [2021-11-07 01:53:09,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50e4d787 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:53:09, skipping insertion in model container [2021-11-07 01:53:09,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:53:09" (3/3) ... [2021-11-07 01:53:09,408 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--usb--gadget--udc--gr_udc.ko-entry_point.cil.out.i [2021-11-07 01:53:09,413 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:53:09,413 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 84 error locations. [2021-11-07 01:53:09,491 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:53:09,497 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:53:09,497 INFO L340 AbstractCegarLoop]: Starting to check reachability of 84 error locations. [2021-11-07 01:53:09,622 INFO L276 IsEmpty]: Start isEmpty. Operand has 6972 states, 6832 states have (on average 1.4111533957845432) internal successors, (9641), 6954 states have internal predecessors, (9641), 50 states have call successors, (50), 5 states have call predecessors, (50), 5 states have return successors, (50), 48 states have call predecessors, (50), 50 states have call successors, (50) [2021-11-07 01:53:09,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:53:09,634 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:09,634 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:53:09,635 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr53ASSERT_VIOLATIONERROR_FUNCTION === [gr_ep0_setupErr0ASSERT_VIOLATIONERROR_FUNCTION, gr_ep0_setupErr1ASSERT_VIOLATIONERROR_FUNCTION, gr_ep0_setupErr2ASSERT_VIOLATIONERROR_FUNCTION (and 81 more)] === [2021-11-07 01:53:09,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:09,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1624961225, now seen corresponding path program 1 times [2021-11-07 01:53:09,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:53:09,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1685022747] [2021-11-07 01:53:09,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:09,664 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:53:09,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:53:09,669 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:53:09,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:53:17,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:17,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 2492 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:53:17,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:18,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:18,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:18,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:18,363 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:53:18,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1685022747] [2021-11-07 01:53:18,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1685022747] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:18,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:53:18,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:53:18,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592906561] [2021-11-07 01:53:18,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:53:18,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:53:18,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:53:18,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:53:18,413 INFO L87 Difference]: Start difference. First operand has 6972 states, 6832 states have (on average 1.4111533957845432) internal successors, (9641), 6954 states have internal predecessors, (9641), 50 states have call successors, (50), 5 states have call predecessors, (50), 5 states have return successors, (50), 48 states have call predecessors, (50), 50 states have call successors, (50) Second operand has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:18,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:18,761 INFO L93 Difference]: Finished difference Result 13940 states and 19527 transitions. [2021-11-07 01:53:18,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:53:18,763 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 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 55 [2021-11-07 01:53:18,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:18,832 INFO L225 Difference]: With dead ends: 13940 [2021-11-07 01:53:18,832 INFO L226 Difference]: Without dead ends: 6918 [2021-11-07 01:53:18,865 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 108 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 01:53:18,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6918 states. [2021-11-07 01:53:19,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6918 to 6918. [2021-11-07 01:53:19,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6918 states, 6779 states have (on average 1.3600826080542854) internal successors, (9220), 6900 states have internal predecessors, (9220), 50 states have call successors, (50), 5 states have call predecessors, (50), 5 states have return successors, (50), 48 states have call predecessors, (50), 50 states have call successors, (50) [2021-11-07 01:53:19,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6918 states to 6918 states and 9320 transitions. [2021-11-07 01:53:19,392 INFO L78 Accepts]: Start accepts. Automaton has 6918 states and 9320 transitions. Word has length 55 [2021-11-07 01:53:19,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:19,393 INFO L470 AbstractCegarLoop]: Abstraction has 6918 states and 9320 transitions. [2021-11-07 01:53:19,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:19,394 INFO L276 IsEmpty]: Start isEmpty. Operand 6918 states and 9320 transitions. [2021-11-07 01:53:19,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:53:19,406 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:19,406 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:53:19,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:53:19,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:53:19,630 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr53ASSERT_VIOLATIONERROR_FUNCTION === [gr_ep0_setupErr0ASSERT_VIOLATIONERROR_FUNCTION, gr_ep0_setupErr1ASSERT_VIOLATIONERROR_FUNCTION, gr_ep0_setupErr2ASSERT_VIOLATIONERROR_FUNCTION (and 81 more)] === [2021-11-07 01:53:19,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:19,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1568654289, now seen corresponding path program 1 times [2021-11-07 01:53:19,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:53:19,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [544509354] [2021-11-07 01:53:19,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:19,647 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:53:19,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:53:19,653 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:53:19,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:53:27,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:27,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 2492 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:53:27,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:27,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:27,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:28,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:28,052 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:53:28,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [544509354] [2021-11-07 01:53:28,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [544509354] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:28,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:53:28,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:53:28,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948346578] [2021-11-07 01:53:28,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:53:28,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:53:28,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:53:28,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:53:28,056 INFO L87 Difference]: Start difference. First operand 6918 states and 9320 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:30,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:30,969 INFO L93 Difference]: Finished difference Result 13876 states and 18739 transitions. [2021-11-07 01:53:30,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:53:30,971 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 55 [2021-11-07 01:53:30,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:31,021 INFO L225 Difference]: With dead ends: 13876 [2021-11-07 01:53:31,021 INFO L226 Difference]: Without dead ends: 6978 [2021-11-07 01:53:31,038 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 106 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 01:53:31,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6978 states. [2021-11-07 01:53:31,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6978 to 6978. [2021-11-07 01:53:31,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6978 states, 6839 states have (on average 1.3569235268314082) internal successors, (9280), 6960 states have internal predecessors, (9280), 50 states have call successors, (50), 5 states have call predecessors, (50), 5 states have return successors, (50), 48 states have call predecessors, (50), 50 states have call successors, (50) [2021-11-07 01:53:31,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6978 states to 6978 states and 9380 transitions. [2021-11-07 01:53:31,259 INFO L78 Accepts]: Start accepts. Automaton has 6978 states and 9380 transitions. Word has length 55 [2021-11-07 01:53:31,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:31,260 INFO L470 AbstractCegarLoop]: Abstraction has 6978 states and 9380 transitions. [2021-11-07 01:53:31,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:31,261 INFO L276 IsEmpty]: Start isEmpty. Operand 6978 states and 9380 transitions. [2021-11-07 01:53:31,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:53:31,263 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:31,263 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:53:31,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:53:31,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:53:31,479 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr53ASSERT_VIOLATIONERROR_FUNCTION === [gr_ep0_setupErr0ASSERT_VIOLATIONERROR_FUNCTION, gr_ep0_setupErr1ASSERT_VIOLATIONERROR_FUNCTION, gr_ep0_setupErr2ASSERT_VIOLATIONERROR_FUNCTION (and 81 more)] === [2021-11-07 01:53:31,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:31,480 INFO L85 PathProgramCache]: Analyzing trace with hash 784211184, now seen corresponding path program 1 times [2021-11-07 01:53:31,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:53:31,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1054739432] [2021-11-07 01:53:31,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:31,485 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:53:31,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:53:31,486 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:53:31,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:53:39,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:39,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 2537 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:53:39,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:40,288 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 01:53:40,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:40,918 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 01:53:40,918 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:53:40,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1054739432] [2021-11-07 01:53:40,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1054739432] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:53:40,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1367460931] [2021-11-07 01:53:40,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:40,919 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:53:40,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:53:40,922 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:53:40,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-07 01:53:43,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:43,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 2537 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:53:43,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:44,192 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:53:44,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:44,380 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:53:44,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1367460931] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:44,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:53:44,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:53:44,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901536753] [2021-11-07 01:53:44,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:53:44,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:53:44,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:53:44,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:53:44,383 INFO L87 Difference]: Start difference. First operand 6978 states and 9380 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:45,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:45,453 INFO L93 Difference]: Finished difference Result 20422 states and 27460 transitions. [2021-11-07 01:53:45,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:53:45,454 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 64 [2021-11-07 01:53:45,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:45,556 INFO L225 Difference]: With dead ends: 20422 [2021-11-07 01:53:45,557 INFO L226 Difference]: Without dead ends: 13493 [2021-11-07 01:53:45,578 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:53:45,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13493 states. [2021-11-07 01:53:46,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13493 to 13333. [2021-11-07 01:53:46,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13333 states, 13141 states have (on average 1.3590289932273039) internal successors, (17859), 13299 states have internal predecessors, (17859), 98 states have call successors, (98), 10 states have call predecessors, (98), 10 states have return successors, (98), 94 states have call predecessors, (98), 98 states have call successors, (98) [2021-11-07 01:53:46,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13333 states to 13333 states and 18055 transitions. [2021-11-07 01:53:46,106 INFO L78 Accepts]: Start accepts. Automaton has 13333 states and 18055 transitions. Word has length 64 [2021-11-07 01:53:46,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:46,107 INFO L470 AbstractCegarLoop]: Abstraction has 13333 states and 18055 transitions. [2021-11-07 01:53:46,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:46,108 INFO L276 IsEmpty]: Start isEmpty. Operand 13333 states and 18055 transitions. [2021-11-07 01:53:46,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-07 01:53:46,122 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:46,123 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:53:46,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:53:46,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:53:46,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:53:46,538 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gr_ep0_setupErr0ASSERT_VIOLATIONERROR_FUNCTION, gr_ep0_setupErr1ASSERT_VIOLATIONERROR_FUNCTION, gr_ep0_setupErr2ASSERT_VIOLATIONERROR_FUNCTION (and 81 more)] === [2021-11-07 01:53:46,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:46,538 INFO L85 PathProgramCache]: Analyzing trace with hash 732009861, now seen corresponding path program 1 times [2021-11-07 01:53:46,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:53:46,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2007478546] [2021-11-07 01:53:46,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:46,548 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:53:46,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:53:46,549 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:53:46,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:53:55,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:55,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 2769 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:53:55,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:56,125 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 01:53:56,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:56,935 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 01:53:56,935 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:53:56,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2007478546] [2021-11-07 01:53:56,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2007478546] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:53:56,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1652935013] [2021-11-07 01:53:56,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:56,936 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:53:56,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:53:56,952 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:53:56,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-07 01:53:59,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:59,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 2769 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:53:59,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:00,356 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:54:00,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:00,686 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:54:00,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1652935013] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:00,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:54:00,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:54:00,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191047744] [2021-11-07 01:54:00,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:54:00,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:00,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:54:00,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:54:00,689 INFO L87 Difference]: Start difference. First operand 13333 states and 18055 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:01,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:01,473 INFO L93 Difference]: Finished difference Result 26633 states and 36086 transitions. [2021-11-07 01:54:01,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:54:01,475 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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 102 [2021-11-07 01:54:01,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:01,532 INFO L225 Difference]: With dead ends: 26633 [2021-11-07 01:54:01,533 INFO L226 Difference]: Without dead ends: 13349 [2021-11-07 01:54:01,573 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:54:01,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13349 states. [2021-11-07 01:54:02,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13349 to 13349. [2021-11-07 01:54:02,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13349 states, 13157 states have (on average 1.3585923842821312) internal successors, (17875), 13315 states have internal predecessors, (17875), 98 states have call successors, (98), 10 states have call predecessors, (98), 10 states have return successors, (98), 94 states have call predecessors, (98), 98 states have call successors, (98) [2021-11-07 01:54:02,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13349 states to 13349 states and 18071 transitions. [2021-11-07 01:54:02,173 INFO L78 Accepts]: Start accepts. Automaton has 13349 states and 18071 transitions. Word has length 102 [2021-11-07 01:54:02,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:02,178 INFO L470 AbstractCegarLoop]: Abstraction has 13349 states and 18071 transitions. [2021-11-07 01:54:02,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:02,179 INFO L276 IsEmpty]: Start isEmpty. Operand 13349 states and 18071 transitions. [2021-11-07 01:54:02,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-07 01:54:02,190 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:02,191 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:54:02,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-07 01:54:02,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:02,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:54:02,614 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gr_ep0_setupErr0ASSERT_VIOLATIONERROR_FUNCTION, gr_ep0_setupErr1ASSERT_VIOLATIONERROR_FUNCTION, gr_ep0_setupErr2ASSERT_VIOLATIONERROR_FUNCTION (and 81 more)] === [2021-11-07 01:54:02,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:02,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1126376647, now seen corresponding path program 1 times [2021-11-07 01:54:02,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:02,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [892149241] [2021-11-07 01:54:02,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:02,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:02,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:02,623 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:02,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:54:11,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:11,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 2771 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:54:11,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:12,396 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 01:54:12,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:13,121 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 01:54:13,121 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:13,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [892149241] [2021-11-07 01:54:13,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [892149241] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:54:13,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1629946429] [2021-11-07 01:54:13,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:13,122 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:54:13,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:54:13,124 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:54:13,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-07 01:54:16,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:16,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 2771 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:54:16,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:16,794 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:54:16,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:17,475 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:54:17,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1629946429] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:17,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:54:17,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-07 01:54:17,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104155970] [2021-11-07 01:54:17,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:54:17,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:17,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:54:17,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:54:17,479 INFO L87 Difference]: Start difference. First operand 13349 states and 18071 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:18,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:18,706 INFO L93 Difference]: Finished difference Result 44485 states and 60176 transitions. [2021-11-07 01:54:18,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:54:18,707 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 3 states have internal predecessors, (100), 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 102 [2021-11-07 01:54:18,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:18,825 INFO L225 Difference]: With dead ends: 44485 [2021-11-07 01:54:18,826 INFO L226 Difference]: Without dead ends: 31185 [2021-11-07 01:54:18,872 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:54:18,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31185 states. [2021-11-07 01:54:19,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31185 to 24089. [2021-11-07 01:54:19,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24089 states, 23799 states have (on average 1.3604773309802933) internal successors, (32378), 24024 states have internal predecessors, (32378), 186 states have call successors, (186), 20 states have call predecessors, (186), 20 states have return successors, (186), 178 states have call predecessors, (186), 186 states have call successors, (186) [2021-11-07 01:54:20,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24089 states to 24089 states and 32750 transitions. [2021-11-07 01:54:20,016 INFO L78 Accepts]: Start accepts. Automaton has 24089 states and 32750 transitions. Word has length 102 [2021-11-07 01:54:20,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:20,017 INFO L470 AbstractCegarLoop]: Abstraction has 24089 states and 32750 transitions. [2021-11-07 01:54:20,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:20,017 INFO L276 IsEmpty]: Start isEmpty. Operand 24089 states and 32750 transitions. [2021-11-07 01:54:20,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-07 01:54:20,048 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:20,048 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:54:20,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:20,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:20,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:20,462 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [gr_ep0_setupErr0ASSERT_VIOLATIONERROR_FUNCTION, gr_ep0_setupErr1ASSERT_VIOLATIONERROR_FUNCTION, gr_ep0_setupErr2ASSERT_VIOLATIONERROR_FUNCTION (and 81 more)] === [2021-11-07 01:54:20,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:20,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1694041871, now seen corresponding path program 1 times [2021-11-07 01:54:20,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:20,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1281322459] [2021-11-07 01:54:20,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:20,470 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:20,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:20,471 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:20,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:54:29,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:30,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 2773 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:54:30,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:30,723 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 01:54:30,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:31,427 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 01:54:31,428 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:31,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1281322459] [2021-11-07 01:54:31,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1281322459] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:54:31,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [339135460] [2021-11-07 01:54:31,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:31,429 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:54:31,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:54:31,447 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:54:31,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-07 01:54:34,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:34,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 2773 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:54:34,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:35,424 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:54:35,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:35,982 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:54:35,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [339135460] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:35,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:54:35,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-07 01:54:35,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802891201] [2021-11-07 01:54:35,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:54:35,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:35,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:54:35,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:54:35,985 INFO L87 Difference]: Start difference. First operand 24089 states and 32750 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:37,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:37,756 INFO L93 Difference]: Finished difference Result 64379 states and 87324 transitions. [2021-11-07 01:54:37,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:54:37,758 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 3 states have internal predecessors, (101), 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 103 [2021-11-07 01:54:37,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:37,918 INFO L225 Difference]: With dead ends: 64379 [2021-11-07 01:54:37,918 INFO L226 Difference]: Without dead ends: 46909 [2021-11-07 01:54:37,958 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 400 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:54:38,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46909 states. [2021-11-07 01:54:39,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46909 to 35655. [2021-11-07 01:54:39,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35655 states, 35277 states have (on average 1.3607449613062335) internal successors, (48003), 35561 states have internal predecessors, (48003), 264 states have call successors, (264), 30 states have call predecessors, (264), 30 states have return successors, (264), 252 states have call predecessors, (264), 264 states have call successors, (264) [2021-11-07 01:54:39,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35655 states to 35655 states and 48531 transitions. [2021-11-07 01:54:39,446 INFO L78 Accepts]: Start accepts. Automaton has 35655 states and 48531 transitions. Word has length 103 [2021-11-07 01:54:39,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:39,447 INFO L470 AbstractCegarLoop]: Abstraction has 35655 states and 48531 transitions. [2021-11-07 01:54:39,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:39,448 INFO L276 IsEmpty]: Start isEmpty. Operand 35655 states and 48531 transitions. [2021-11-07 01:54:39,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-07 01:54:39,466 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:39,467 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:54:39,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:39,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:39,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:54:39,882 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION === [gr_ep0_setupErr0ASSERT_VIOLATIONERROR_FUNCTION, gr_ep0_setupErr1ASSERT_VIOLATIONERROR_FUNCTION, gr_ep0_setupErr2ASSERT_VIOLATIONERROR_FUNCTION (and 81 more)] === [2021-11-07 01:54:39,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:39,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1689094500, now seen corresponding path program 1 times [2021-11-07 01:54:39,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:39,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [95229388] [2021-11-07 01:54:39,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:39,893 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:39,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:39,894 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:39,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:54:48,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:49,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 2777 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:54:49,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:49,697 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 01:54:49,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:50,429 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 01:54:50,429 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:50,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [95229388] [2021-11-07 01:54:50,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [95229388] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:54:50,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1314611872] [2021-11-07 01:54:50,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:50,430 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:54:50,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:54:50,431 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:54:50,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-07 01:54:53,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:53,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 2777 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:54:53,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:54,367 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:54:54,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:54,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:54:54,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1314611872] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:54,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:54:54,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-07 01:54:54,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739153891] [2021-11-07 01:54:54,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:54:54,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:54,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:54:54,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:54:54,937 INFO L87 Difference]: Start difference. First operand 35655 states and 48531 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:57,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:57,029 INFO L93 Difference]: Finished difference Result 92549 states and 125703 transitions. [2021-11-07 01:54:57,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:54:57,030 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 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 104 [2021-11-07 01:54:57,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:57,256 INFO L225 Difference]: With dead ends: 92549 [2021-11-07 01:54:57,257 INFO L226 Difference]: Without dead ends: 62961 [2021-11-07 01:54:57,504 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:54:57,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62961 states. [2021-11-07 01:54:59,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62961 to 46225. [2021-11-07 01:54:59,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46225 states, 45769 states have (on average 1.3610959382988486) internal successors, (62296), 46104 states have internal predecessors, (62296), 332 states have call successors, (332), 40 states have call predecessors, (332), 40 states have return successors, (332), 316 states have call predecessors, (332), 332 states have call successors, (332) [2021-11-07 01:54:59,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46225 states to 46225 states and 62960 transitions. [2021-11-07 01:54:59,818 INFO L78 Accepts]: Start accepts. Automaton has 46225 states and 62960 transitions. Word has length 104 [2021-11-07 01:54:59,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:59,820 INFO L470 AbstractCegarLoop]: Abstraction has 46225 states and 62960 transitions. [2021-11-07 01:54:59,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:59,820 INFO L276 IsEmpty]: Start isEmpty. Operand 46225 states and 62960 transitions. [2021-11-07 01:54:59,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-07 01:54:59,836 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:59,837 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:54:59,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:00,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:00,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:00,261 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr53ASSERT_VIOLATIONERROR_FUNCTION === [gr_ep0_setupErr0ASSERT_VIOLATIONERROR_FUNCTION, gr_ep0_setupErr1ASSERT_VIOLATIONERROR_FUNCTION, gr_ep0_setupErr2ASSERT_VIOLATIONERROR_FUNCTION (and 81 more)] === [2021-11-07 01:55:00,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:00,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1993784458, now seen corresponding path program 1 times [2021-11-07 01:55:00,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:00,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [659233834] [2021-11-07 01:55:00,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:00,267 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:00,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:00,270 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:00,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:55:08,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:08,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 2744 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:55:08,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:09,463 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 01:55:09,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:10,121 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 01:55:10,121 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:10,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [659233834] [2021-11-07 01:55:10,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [659233834] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:55:10,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1157234709] [2021-11-07 01:55:10,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:10,122 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:55:10,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:55:10,122 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:55:10,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-07 01:55:13,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:13,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 2744 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:55:13,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:14,354 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 01:55:14,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:15,087 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 01:55:15,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1157234709] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:15,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:55:15,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:55:15,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286041609] [2021-11-07 01:55:15,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:55:15,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:15,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:55:15,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:55:15,091 INFO L87 Difference]: Start difference. First operand 46225 states and 62960 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:17,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:17,167 INFO L93 Difference]: Finished difference Result 46225 states and 62960 transitions. [2021-11-07 01:55:17,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:55:17,167 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 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 105 [2021-11-07 01:55:17,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:17,306 INFO L225 Difference]: With dead ends: 46225 [2021-11-07 01:55:17,306 INFO L226 Difference]: Without dead ends: 46223 [2021-11-07 01:55:17,325 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 409 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:55:17,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46223 states. [2021-11-07 01:55:19,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46223 to 46223. [2021-11-07 01:55:19,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46223 states, 45768 states have (on average 1.3610164306939345) internal successors, (62291), 46102 states have internal predecessors, (62291), 332 states have call successors, (332), 40 states have call predecessors, (332), 40 states have return successors, (332), 316 states have call predecessors, (332), 332 states have call successors, (332) [2021-11-07 01:55:19,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46223 states to 46223 states and 62955 transitions. [2021-11-07 01:55:19,280 INFO L78 Accepts]: Start accepts. Automaton has 46223 states and 62955 transitions. Word has length 105 [2021-11-07 01:55:19,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:19,280 INFO L470 AbstractCegarLoop]: Abstraction has 46223 states and 62955 transitions. [2021-11-07 01:55:19,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:19,280 INFO L276 IsEmpty]: Start isEmpty. Operand 46223 states and 62955 transitions. [2021-11-07 01:55:19,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-07 01:55:19,290 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:19,290 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:55:19,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:19,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2021-11-07 01:55:19,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:55:19,706 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONERROR_FUNCTION === [gr_ep0_setupErr0ASSERT_VIOLATIONERROR_FUNCTION, gr_ep0_setupErr1ASSERT_VIOLATIONERROR_FUNCTION, gr_ep0_setupErr2ASSERT_VIOLATIONERROR_FUNCTION (and 81 more)] === [2021-11-07 01:55:19,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:19,706 INFO L85 PathProgramCache]: Analyzing trace with hash -2054632597, now seen corresponding path program 1 times [2021-11-07 01:55:19,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:19,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [405129296] [2021-11-07 01:55:19,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:19,710 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:19,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:19,711 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:19,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:55:27,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:28,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 2774 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:55:28,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:28,636 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 01:55:28,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:29,338 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 01:55:29,338 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:29,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [405129296] [2021-11-07 01:55:29,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [405129296] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:55:29,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [276782055] [2021-11-07 01:55:29,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:29,339 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:55:29,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:55:29,339 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:55:29,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:55:32,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:32,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 2774 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:55:32,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:33,164 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:55:33,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:33,455 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:55:33,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [276782055] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:33,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:55:33,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:55:33,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917626111] [2021-11-07 01:55:33,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:55:33,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:33,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:55:33,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:55:33,458 INFO L87 Difference]: Start difference. First operand 46223 states and 62955 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:35,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:35,008 INFO L93 Difference]: Finished difference Result 92449 states and 125958 transitions. [2021-11-07 01:55:35,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:55:35,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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 105 [2021-11-07 01:55:35,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:35,343 INFO L225 Difference]: With dead ends: 92449 [2021-11-07 01:55:35,355 INFO L226 Difference]: Without dead ends: 46275 [2021-11-07 01:55:35,440 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 409 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:55:35,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46275 states. [2021-11-07 01:55:37,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46275 to 46275. [2021-11-07 01:55:37,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46275 states, 45820 states have (on average 1.360606721955478) internal successors, (62343), 46154 states have internal predecessors, (62343), 332 states have call successors, (332), 40 states have call predecessors, (332), 40 states have return successors, (332), 316 states have call predecessors, (332), 332 states have call successors, (332) [2021-11-07 01:55:37,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46275 states to 46275 states and 63007 transitions. [2021-11-07 01:55:37,500 INFO L78 Accepts]: Start accepts. Automaton has 46275 states and 63007 transitions. Word has length 105 [2021-11-07 01:55:37,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:37,500 INFO L470 AbstractCegarLoop]: Abstraction has 46275 states and 63007 transitions. [2021-11-07 01:55:37,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:37,500 INFO L276 IsEmpty]: Start isEmpty. Operand 46275 states and 63007 transitions. [2021-11-07 01:55:37,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-07 01:55:37,515 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:37,515 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:55:37,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-07 01:55:37,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 01:55:37,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:37,941 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONERROR_FUNCTION === [gr_ep0_setupErr0ASSERT_VIOLATIONERROR_FUNCTION, gr_ep0_setupErr1ASSERT_VIOLATIONERROR_FUNCTION, gr_ep0_setupErr2ASSERT_VIOLATIONERROR_FUNCTION (and 81 more)] === [2021-11-07 01:55:37,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:37,942 INFO L85 PathProgramCache]: Analyzing trace with hash -2116672211, now seen corresponding path program 1 times [2021-11-07 01:55:37,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:37,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2082764353] [2021-11-07 01:55:37,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:37,947 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:37,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:37,948 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:37,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:55:46,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:46,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 2776 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:55:46,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:47,029 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 01:55:47,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:47,679 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 01:55:47,680 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:47,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2082764353] [2021-11-07 01:55:47,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2082764353] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:55:47,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1531091519] [2021-11-07 01:55:47,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:47,681 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:55:47,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:55:47,682 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:55:47,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 01:55:51,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:51,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 2776 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:55:51,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:51,748 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:55:51,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:52,323 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:55:52,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1531091519] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:52,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:55:52,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-07 01:55:52,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814334458] [2021-11-07 01:55:52,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:55:52,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:52,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:55:52,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:55:52,326 INFO L87 Difference]: Start difference. First operand 46275 states and 63007 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:55,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:55,210 INFO L93 Difference]: Finished difference Result 150289 states and 204384 transitions. [2021-11-07 01:55:55,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:55:55,211 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 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 105 [2021-11-07 01:55:55,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:55,491 INFO L225 Difference]: With dead ends: 150289 [2021-11-07 01:55:55,492 INFO L226 Difference]: Without dead ends: 104063 [2021-11-07 01:55:55,587 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 408 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:55:55,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104063 states. [2021-11-07 01:55:58,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104063 to 82831. [2021-11-07 01:55:58,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82831 states, 82044 states have (on average 1.3624274779386671) internal successors, (111779), 82598 states have internal predecessors, (111779), 624 states have call successors, (624), 80 states have call predecessors, (624), 80 states have return successors, (624), 592 states have call predecessors, (624), 624 states have call successors, (624) [2021-11-07 01:55:59,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82831 states to 82831 states and 113027 transitions. [2021-11-07 01:55:59,102 INFO L78 Accepts]: Start accepts. Automaton has 82831 states and 113027 transitions. Word has length 105 [2021-11-07 01:55:59,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:59,103 INFO L470 AbstractCegarLoop]: Abstraction has 82831 states and 113027 transitions. [2021-11-07 01:55:59,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:59,103 INFO L276 IsEmpty]: Start isEmpty. Operand 82831 states and 113027 transitions. [2021-11-07 01:55:59,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-07 01:55:59,122 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:59,123 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:55:59,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:59,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-07 01:55:59,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:55:59,526 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONERROR_FUNCTION === [gr_ep0_setupErr0ASSERT_VIOLATIONERROR_FUNCTION, gr_ep0_setupErr1ASSERT_VIOLATIONERROR_FUNCTION, gr_ep0_setupErr2ASSERT_VIOLATIONERROR_FUNCTION (and 81 more)] === [2021-11-07 01:55:59,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:59,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1754582412, now seen corresponding path program 1 times [2021-11-07 01:55:59,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:59,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [954800397] [2021-11-07 01:55:59,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:59,530 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:59,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:59,531 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:59,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:56:08,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:08,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 2779 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:56:08,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:08,988 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 01:56:08,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:09,608 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 01:56:09,608 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:09,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [954800397] [2021-11-07 01:56:09,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [954800397] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:56:09,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1919407857] [2021-11-07 01:56:09,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:09,609 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:09,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:56:09,611 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:56:09,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 01:56:13,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:13,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 2779 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:56:13,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:14,026 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:56:14,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:14,617 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:56:14,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1919407857] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:56:14,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:56:14,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-07 01:56:14,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938517740] [2021-11-07 01:56:14,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:56:14,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:14,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:56:14,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:56:14,620 INFO L87 Difference]: Start difference. First operand 82831 states and 113027 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:19,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:19,195 INFO L93 Difference]: Finished difference Result 208547 states and 284109 transitions. [2021-11-07 01:56:19,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:56:19,197 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 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 105 [2021-11-07 01:56:19,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:19,580 INFO L225 Difference]: With dead ends: 208547 [2021-11-07 01:56:19,580 INFO L226 Difference]: Without dead ends: 134337 [2021-11-07 01:56:19,924 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 408 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:56:20,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134337 states. [2021-11-07 01:56:23,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134337 to 99619. [2021-11-07 01:56:23,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99619 states, 98706 states have (on average 1.3628654793021702) internal successors, (134523), 99338 states have internal predecessors, (134523), 730 states have call successors, (730), 100 states have call predecessors, (730), 100 states have return successors, (730), 690 states have call predecessors, (730), 730 states have call successors, (730) [2021-11-07 01:56:23,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99619 states to 99619 states and 135983 transitions. [2021-11-07 01:56:23,725 INFO L78 Accepts]: Start accepts. Automaton has 99619 states and 135983 transitions. Word has length 105 [2021-11-07 01:56:23,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:23,726 INFO L470 AbstractCegarLoop]: Abstraction has 99619 states and 135983 transitions. [2021-11-07 01:56:23,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:23,726 INFO L276 IsEmpty]: Start isEmpty. Operand 99619 states and 135983 transitions. [2021-11-07 01:56:23,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-07 01:56:23,989 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:23,989 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:56:24,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:24,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:24,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:24,406 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr32ASSERT_VIOLATIONERROR_FUNCTION === [gr_ep0_setupErr0ASSERT_VIOLATIONERROR_FUNCTION, gr_ep0_setupErr1ASSERT_VIOLATIONERROR_FUNCTION, gr_ep0_setupErr2ASSERT_VIOLATIONERROR_FUNCTION (and 81 more)] === [2021-11-07 01:56:24,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:24,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1499705299, now seen corresponding path program 1 times [2021-11-07 01:56:24,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:24,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [903545783] [2021-11-07 01:56:24,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:24,412 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:24,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:24,415 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:24,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:56:33,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:33,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 2766 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:56:33,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:34,530 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 01:56:34,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:35,184 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 01:56:35,184 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:35,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [903545783] [2021-11-07 01:56:35,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [903545783] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:56:35,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1505844423] [2021-11-07 01:56:35,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:35,184 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:35,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:56:35,185 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:56:35,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-07 01:56:38,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:39,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 2766 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:56:39,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:39,677 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:56:39,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:40,244 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:56:40,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1505844423] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:56:40,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:56:40,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-07 01:56:40,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7261479] [2021-11-07 01:56:40,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:56:40,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:40,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:56:40,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:56:40,246 INFO L87 Difference]: Start difference. First operand 99619 states and 135983 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:44,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:44,060 INFO L93 Difference]: Finished difference Result 185955 states and 253793 transitions. [2021-11-07 01:56:44,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:56:44,061 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 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 106 [2021-11-07 01:56:44,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:44,380 INFO L225 Difference]: With dead ends: 185955 [2021-11-07 01:56:44,380 INFO L226 Difference]: Without dead ends: 109287 [2021-11-07 01:56:44,490 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:56:44,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109287 states. [2021-11-07 01:56:48,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109287 to 91817. [2021-11-07 01:56:48,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91817 states, 91010 states have (on average 1.3635534556642128) internal successors, (124097), 91556 states have internal predecessors, (124097), 630 states have call successors, (630), 100 states have call predecessors, (630), 100 states have return successors, (630), 590 states have call predecessors, (630), 630 states have call successors, (630) [2021-11-07 01:56:48,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91817 states to 91817 states and 125357 transitions. [2021-11-07 01:56:48,367 INFO L78 Accepts]: Start accepts. Automaton has 91817 states and 125357 transitions. Word has length 106 [2021-11-07 01:56:48,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:48,367 INFO L470 AbstractCegarLoop]: Abstraction has 91817 states and 125357 transitions. [2021-11-07 01:56:48,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:48,368 INFO L276 IsEmpty]: Start isEmpty. Operand 91817 states and 125357 transitions. [2021-11-07 01:56:48,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-07 01:56:48,379 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:48,379 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:56:48,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:48,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:48,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:48,794 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr38ASSERT_VIOLATIONERROR_FUNCTION === [gr_ep0_setupErr0ASSERT_VIOLATIONERROR_FUNCTION, gr_ep0_setupErr1ASSERT_VIOLATIONERROR_FUNCTION, gr_ep0_setupErr2ASSERT_VIOLATIONERROR_FUNCTION (and 81 more)] === [2021-11-07 01:56:48,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:48,794 INFO L85 PathProgramCache]: Analyzing trace with hash 624789489, now seen corresponding path program 1 times [2021-11-07 01:56:48,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:48,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2000548658] [2021-11-07 01:56:48,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:48,800 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:48,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:48,801 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:48,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 01:56:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:57,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 2771 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:56:57,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:58,261 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 01:56:58,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:58,962 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 01:56:58,962 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:58,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2000548658] [2021-11-07 01:56:58,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2000548658] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:56:58,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [983337383] [2021-11-07 01:56:58,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:58,963 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:58,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:56:58,972 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:56:58,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b043de3-bd6d-4a9c-9ad4-c5503e509161/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-07 01:57:02,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:03,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 2771 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:57:03,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:03,727 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:57:03,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:04,290 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:57:04,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [983337383] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:04,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:57:04,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-07 01:57:04,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296743202] [2021-11-07 01:57:04,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:57:04,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:04,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:57:04,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:57:04,293 INFO L87 Difference]: Start difference. First operand 91817 states and 125357 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:08,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:08,703 INFO L93 Difference]: Finished difference Result 173101 states and 236311 transitions. [2021-11-07 01:57:08,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:57:08,704 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 3 states have internal predecessors, (105), 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 107 [2021-11-07 01:57:08,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:08,910 INFO L225 Difference]: With dead ends: 173101 [2021-11-07 01:57:08,911 INFO L226 Difference]: Without dead ends: 101465 [2021-11-07 01:57:08,992 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:57:09,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101465 states.