./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--ipheth.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_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/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_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--ipheth.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/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_8cd1f4a0-0902-42b7-a5da-205836494fd4/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 1a07d05bdda9164d6ceaf1185c6dc5dd43200f7171a99953930c3f9edfac2ac7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:18:11,346 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:18:11,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:18:11,424 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:18:11,424 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:18:11,430 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:18:11,432 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:18:11,437 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:18:11,440 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:18:11,446 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:18:11,447 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:18:11,449 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:18:11,450 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:18:11,453 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:18:11,455 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:18:11,464 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:18:11,466 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:18:11,467 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:18:11,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:18:11,479 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:18:11,481 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:18:11,483 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:18:11,486 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:18:11,488 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:18:11,498 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:18:11,498 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:18:11,499 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:18:11,501 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:18:11,502 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:18:11,503 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:18:11,504 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:18:11,505 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:18:11,507 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:18:11,509 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:18:11,511 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:18:11,511 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:18:11,512 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:18:11,512 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:18:11,512 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:18:11,513 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:18:11,514 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:18:11,515 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 02:18:11,566 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:18:11,567 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:18:11,568 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:18:11,568 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:18:11,569 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:18:11,569 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:18:11,569 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:18:11,570 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:18:11,577 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:18:11,577 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:18:11,578 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:18:11,579 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:18:11,579 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:18:11,579 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:18:11,580 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:18:11,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:18:11,581 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:18:11,581 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:18:11,581 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:18:11,582 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:18:11,582 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:18:11,582 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:18:11,582 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:18:11,583 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:18:11,583 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:18:11,583 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:18:11,584 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:18:11,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:18:11,584 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:18:11,586 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:18:11,586 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:18:11,587 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:18:11,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:18:11,587 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:18:11,588 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:18:11,588 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:18:11,588 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_8cd1f4a0-0902-42b7-a5da-205836494fd4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a07d05bdda9164d6ceaf1185c6dc5dd43200f7171a99953930c3f9edfac2ac7 [2021-11-07 02:18:12,020 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:18:12,047 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:18:12,050 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:18:12,051 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:18:12,052 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:18:12,054 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--ipheth.ko-entry_point.cil.out.i [2021-11-07 02:18:12,141 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/data/8ac31aa30/a0e4a44b564844479b1b4e48d168f5a4/FLAGa0e806b0f [2021-11-07 02:18:13,195 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:18:13,196 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--ipheth.ko-entry_point.cil.out.i [2021-11-07 02:18:13,255 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/data/8ac31aa30/a0e4a44b564844479b1b4e48d168f5a4/FLAGa0e806b0f [2021-11-07 02:18:13,699 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/data/8ac31aa30/a0e4a44b564844479b1b4e48d168f5a4 [2021-11-07 02:18:13,701 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:18:13,703 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:18:13,705 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:18:13,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:18:13,708 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:18:13,709 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:18:13" (1/1) ... [2021-11-07 02:18:13,711 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19bea234 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:13, skipping insertion in model container [2021-11-07 02:18:13,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:18:13" (1/1) ... [2021-11-07 02:18:13,719 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:18:13,838 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:18:15,080 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_8cd1f4a0-0902-42b7-a5da-205836494fd4/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--ipheth.ko-entry_point.cil.out.i[159689,159702] [2021-11-07 02:18:15,343 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:18:15,602 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:18:15,638 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 02:18:15,639 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@75026f64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:15, skipping insertion in model container [2021-11-07 02:18:15,639 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:18:15,640 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:18:15,642 INFO L168 Benchmark]: Toolchain (without parser) took 1937.88 ms. Allocated memory is still 94.4 MB. Free memory was 63.7 MB in the beginning and 43.4 MB in the end (delta: 20.3 MB). Peak memory consumption was 27.1 MB. Max. memory is 16.1 GB. [2021-11-07 02:18:15,643 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 77.6 MB. Free memory was 55.6 MB in the beginning and 55.6 MB in the end (delta: 75.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:18:15,644 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1935.01 ms. Allocated memory is still 94.4 MB. Free memory was 63.3 MB in the beginning and 43.4 MB in the end (delta: 19.9 MB). Peak memory consumption was 27.1 MB. Max. memory is 16.1 GB. [2021-11-07 02:18:15,646 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 77.6 MB. Free memory was 55.6 MB in the beginning and 55.6 MB in the end (delta: 75.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1935.01 ms. Allocated memory is still 94.4 MB. Free memory was 63.3 MB in the beginning and 43.4 MB in the end (delta: 19.9 MB). Peak memory consumption was 27.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 5756]: 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_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/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_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--ipheth.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/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_8cd1f4a0-0902-42b7-a5da-205836494fd4/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 1a07d05bdda9164d6ceaf1185c6dc5dd43200f7171a99953930c3f9edfac2ac7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:18:18,202 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:18:18,206 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:18:18,263 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:18:18,264 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:18:18,269 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:18:18,272 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:18:18,277 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:18:18,281 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:18:18,293 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:18:18,295 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:18:18,296 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:18:18,296 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:18:18,298 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:18:18,299 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:18:18,301 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:18:18,302 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:18:18,303 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:18:18,309 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:18:18,320 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:18:18,323 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:18:18,326 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:18:18,333 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:18:18,335 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:18:18,339 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:18:18,340 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:18:18,340 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:18:18,342 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:18:18,343 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:18:18,344 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:18:18,346 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:18:18,347 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:18:18,349 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:18:18,350 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:18:18,352 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:18:18,352 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:18:18,353 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:18:18,354 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:18:18,354 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:18:18,356 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:18:18,357 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:18:18,363 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 02:18:18,422 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:18:18,422 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:18:18,424 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:18:18,424 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:18:18,425 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:18:18,425 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:18:18,425 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:18:18,425 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:18:18,426 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:18:18,427 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:18:18,429 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:18:18,429 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:18:18,429 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:18:18,429 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:18:18,430 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:18:18,430 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:18:18,430 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:18:18,430 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:18:18,430 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:18:18,431 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:18:18,431 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:18:18,431 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:18:18,431 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:18:18,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:18:18,432 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:18:18,432 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:18:18,432 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:18:18,433 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:18:18,433 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:18:18,433 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:18:18,433 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:18:18,434 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:18:18,434 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_8cd1f4a0-0902-42b7-a5da-205836494fd4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a07d05bdda9164d6ceaf1185c6dc5dd43200f7171a99953930c3f9edfac2ac7 [2021-11-07 02:18:18,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:18:18,963 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:18:18,966 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:18:18,968 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:18:18,969 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:18:18,970 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--ipheth.ko-entry_point.cil.out.i [2021-11-07 02:18:19,057 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/data/a6a9c3679/d44579d39b66411ab09b6fbf29e8e4b2/FLAG441a45b32 [2021-11-07 02:18:20,116 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:18:20,117 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--ipheth.ko-entry_point.cil.out.i [2021-11-07 02:18:20,198 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/data/a6a9c3679/d44579d39b66411ab09b6fbf29e8e4b2/FLAG441a45b32 [2021-11-07 02:18:20,546 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/data/a6a9c3679/d44579d39b66411ab09b6fbf29e8e4b2 [2021-11-07 02:18:20,549 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:18:20,551 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:18:20,553 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:18:20,553 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:18:20,557 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:18:20,558 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:18:20" (1/1) ... [2021-11-07 02:18:20,560 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@648d99bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:20, skipping insertion in model container [2021-11-07 02:18:20,560 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:18:20" (1/1) ... [2021-11-07 02:18:20,569 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:18:20,722 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:18:21,798 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_8cd1f4a0-0902-42b7-a5da-205836494fd4/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--ipheth.ko-entry_point.cil.out.i[159689,159702] [2021-11-07 02:18:22,200 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:18:22,246 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:18:22,308 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:18:22,485 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_8cd1f4a0-0902-42b7-a5da-205836494fd4/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--ipheth.ko-entry_point.cil.out.i[159689,159702] [2021-11-07 02:18:22,580 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:18:22,605 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:18:22,831 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_8cd1f4a0-0902-42b7-a5da-205836494fd4/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--ipheth.ko-entry_point.cil.out.i[159689,159702] [2021-11-07 02:18:22,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:18:23,156 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:18:23,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:23 WrapperNode [2021-11-07 02:18:23,157 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:18:23,159 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:18:23,159 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:18:23,159 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:18:23,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:23" (1/1) ... [2021-11-07 02:18:23,262 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:23" (1/1) ... [2021-11-07 02:18:23,462 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:18:23,473 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:18:23,473 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:18:23,474 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:18:23,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:23" (1/1) ... [2021-11-07 02:18:23,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:23" (1/1) ... [2021-11-07 02:18:23,517 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:23" (1/1) ... [2021-11-07 02:18:23,518 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:23" (1/1) ... [2021-11-07 02:18:23,708 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:23" (1/1) ... [2021-11-07 02:18:23,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:23" (1/1) ... [2021-11-07 02:18:23,787 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:23" (1/1) ... [2021-11-07 02:18:23,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:18:23,837 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:18:23,838 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:18:23,838 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:18:23,839 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:23" (1/1) ... [2021-11-07 02:18:23,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:18:23,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:18:23,890 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:18:23,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:18:23,972 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 02:18:23,972 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 02:18:23,973 INFO L130 BoogieDeclarations]: Found specification of procedure ipheth_rx_submit [2021-11-07 02:18:23,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ipheth_rx_submit [2021-11-07 02:18:23,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 02:18:23,973 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_9 [2021-11-07 02:18:23,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_9 [2021-11-07 02:18:23,974 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 02:18:23,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 02:18:23,974 INFO L130 BoogieDeclarations]: Found specification of procedure ipheth_rcvbulk_callback [2021-11-07 02:18:23,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ipheth_rcvbulk_callback [2021-11-07 02:18:23,975 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2021-11-07 02:18:23,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2021-11-07 02:18:23,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-07 02:18:23,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-07 02:18:23,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-07 02:18:23,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-07 02:18:23,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 02:18:23,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 02:18:23,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:18:23,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-07 02:18:23,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-07 02:18:23,977 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-07 02:18:23,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-07 02:18:23,978 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-07 02:18:23,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 02:18:23,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-07 02:18:23,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 02:18:23,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-07 02:18:23,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 02:18:23,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 02:18:23,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 02:18:23,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-07 02:18:23,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:18:23,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 02:18:23,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-07 02:18:23,982 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-07 02:18:23,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:18:23,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:18:46,527 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:18:46,528 INFO L299 CfgBuilder]: Removed 491 assume(true) statements. [2021-11-07 02:18:46,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:18:46 BoogieIcfgContainer [2021-11-07 02:18:46,532 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:18:46,534 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:18:46,535 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:18:46,539 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:18:46,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:18:20" (1/3) ... [2021-11-07 02:18:46,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@533d6cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:18:46, skipping insertion in model container [2021-11-07 02:18:46,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:23" (2/3) ... [2021-11-07 02:18:46,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@533d6cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:18:46, skipping insertion in model container [2021-11-07 02:18:46,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:18:46" (3/3) ... [2021-11-07 02:18:46,543 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--ipheth.ko-entry_point.cil.out.i [2021-11-07 02:18:46,550 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:18:46,551 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 02:18:46,617 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:18:46,624 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 02:18:46,624 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 02:18:46,655 INFO L276 IsEmpty]: Start isEmpty. Operand has 453 states, 434 states have (on average 1.3894009216589862) internal successors, (603), 440 states have internal predecessors, (603), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-07 02:18:46,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 02:18:46,662 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:46,663 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:46,663 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:18:46,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:46,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1834363090, now seen corresponding path program 1 times [2021-11-07 02:18:46,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:46,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1641829962] [2021-11-07 02:18:46,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:46,693 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:46,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:46,697 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:46,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:18:47,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:47,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:18:47,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:47,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:47,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:48,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:48,001 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:48,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1641829962] [2021-11-07 02:18:48,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1641829962] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:48,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:48,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:18:48,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142511793] [2021-11-07 02:18:48,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:18:48,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:48,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:18:48,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:48,073 INFO L87 Difference]: Start difference. First operand has 453 states, 434 states have (on average 1.3894009216589862) internal successors, (603), 440 states have internal predecessors, (603), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:50,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:50,616 INFO L93 Difference]: Finished difference Result 1708 states and 2367 transitions. [2021-11-07 02:18:50,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:18:50,619 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-07 02:18:50,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:50,647 INFO L225 Difference]: With dead ends: 1708 [2021-11-07 02:18:50,648 INFO L226 Difference]: Without dead ends: 1235 [2021-11-07 02:18:50,657 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:50,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2021-11-07 02:18:50,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 1235. [2021-11-07 02:18:50,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1235 states, 1191 states have (on average 1.3333333333333333) internal successors, (1588), 1198 states have internal predecessors, (1588), 24 states have call successors, (24), 15 states have call predecessors, (24), 15 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-07 02:18:50,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1235 states to 1235 states and 1636 transitions. [2021-11-07 02:18:50,824 INFO L78 Accepts]: Start accepts. Automaton has 1235 states and 1636 transitions. Word has length 19 [2021-11-07 02:18:50,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:50,825 INFO L470 AbstractCegarLoop]: Abstraction has 1235 states and 1636 transitions. [2021-11-07 02:18:50,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:50,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1235 states and 1636 transitions. [2021-11-07 02:18:50,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 02:18:50,835 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:50,835 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:50,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:51,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:51,053 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:18:51,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:51,054 INFO L85 PathProgramCache]: Analyzing trace with hash -313006160, now seen corresponding path program 1 times [2021-11-07 02:18:51,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:51,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1833326939] [2021-11-07 02:18:51,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:51,057 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:51,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:51,067 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:51,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:18:52,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:52,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:18:52,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:52,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:52,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:52,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:52,289 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:52,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1833326939] [2021-11-07 02:18:52,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1833326939] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:52,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:52,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:18:52,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062236695] [2021-11-07 02:18:52,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:18:52,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:52,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:18:52,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:18:52,299 INFO L87 Difference]: Start difference. First operand 1235 states and 1636 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:52,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:52,497 INFO L93 Difference]: Finished difference Result 1265 states and 1664 transitions. [2021-11-07 02:18:52,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:18:52,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-07 02:18:52,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:52,508 INFO L225 Difference]: With dead ends: 1265 [2021-11-07 02:18:52,509 INFO L226 Difference]: Without dead ends: 1250 [2021-11-07 02:18:52,510 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:18:52,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-11-07 02:18:52,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1235. [2021-11-07 02:18:52,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1235 states, 1191 states have (on average 1.3324937027707808) internal successors, (1587), 1198 states have internal predecessors, (1587), 24 states have call successors, (24), 15 states have call predecessors, (24), 15 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-07 02:18:52,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1235 states to 1235 states and 1635 transitions. [2021-11-07 02:18:52,599 INFO L78 Accepts]: Start accepts. Automaton has 1235 states and 1635 transitions. Word has length 26 [2021-11-07 02:18:52,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:52,599 INFO L470 AbstractCegarLoop]: Abstraction has 1235 states and 1635 transitions. [2021-11-07 02:18:52,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:52,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1235 states and 1635 transitions. [2021-11-07 02:18:52,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 02:18:52,602 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:52,602 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:52,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:52,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:52,826 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:18:52,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:52,827 INFO L85 PathProgramCache]: Analyzing trace with hash -312946578, now seen corresponding path program 1 times [2021-11-07 02:18:52,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:52,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [563940985] [2021-11-07 02:18:52,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:52,830 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:52,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:52,832 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:52,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:18:53,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:53,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:18:53,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:54,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:54,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:54,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:54,443 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:54,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [563940985] [2021-11-07 02:18:54,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [563940985] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:54,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:54,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 02:18:54,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119437247] [2021-11-07 02:18:54,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:18:54,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:54,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:18:54,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:54,447 INFO L87 Difference]: Start difference. First operand 1235 states and 1635 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:55,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:55,067 INFO L93 Difference]: Finished difference Result 3667 states and 4934 transitions. [2021-11-07 02:18:55,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:18:55,069 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-07 02:18:55,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:55,092 INFO L225 Difference]: With dead ends: 3667 [2021-11-07 02:18:55,092 INFO L226 Difference]: Without dead ends: 2450 [2021-11-07 02:18:55,098 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:55,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2450 states. [2021-11-07 02:18:55,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2450 to 2438. [2021-11-07 02:18:55,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2438 states, 2355 states have (on average 1.3231422505307855) internal successors, (3116), 2365 states have internal predecessors, (3116), 48 states have call successors, (48), 30 states have call predecessors, (48), 30 states have return successors, (72), 48 states have call predecessors, (72), 48 states have call successors, (72) [2021-11-07 02:18:55,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2438 states to 2438 states and 3236 transitions. [2021-11-07 02:18:55,269 INFO L78 Accepts]: Start accepts. Automaton has 2438 states and 3236 transitions. Word has length 26 [2021-11-07 02:18:55,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:55,269 INFO L470 AbstractCegarLoop]: Abstraction has 2438 states and 3236 transitions. [2021-11-07 02:18:55,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:55,270 INFO L276 IsEmpty]: Start isEmpty. Operand 2438 states and 3236 transitions. [2021-11-07 02:18:55,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 02:18:55,271 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:55,272 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:55,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:55,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:55,498 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:18:55,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:55,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1111409595, now seen corresponding path program 1 times [2021-11-07 02:18:55,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:55,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [607238037] [2021-11-07 02:18:55,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:55,502 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:55,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:55,504 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:55,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:18:56,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:56,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:18:56,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:56,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:56,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:57,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:57,242 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:57,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [607238037] [2021-11-07 02:18:57,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [607238037] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:57,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:57,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 02:18:57,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285172426] [2021-11-07 02:18:57,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:18:57,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:57,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:18:57,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:57,245 INFO L87 Difference]: Start difference. First operand 2438 states and 3236 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:57,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:57,435 INFO L93 Difference]: Finished difference Result 2438 states and 3236 transitions. [2021-11-07 02:18:57,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:18:57,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-07 02:18:57,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:57,454 INFO L225 Difference]: With dead ends: 2438 [2021-11-07 02:18:57,454 INFO L226 Difference]: Without dead ends: 2436 [2021-11-07 02:18:57,456 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:57,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-11-07 02:18:57,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 2436. [2021-11-07 02:18:57,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2436 states, 2354 states have (on average 1.3228547153780799) internal successors, (3114), 2363 states have internal predecessors, (3114), 48 states have call successors, (48), 30 states have call predecessors, (48), 30 states have return successors, (72), 48 states have call predecessors, (72), 48 states have call successors, (72) [2021-11-07 02:18:57,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2436 states to 2436 states and 3234 transitions. [2021-11-07 02:18:57,658 INFO L78 Accepts]: Start accepts. Automaton has 2436 states and 3234 transitions. Word has length 27 [2021-11-07 02:18:57,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:57,659 INFO L470 AbstractCegarLoop]: Abstraction has 2436 states and 3234 transitions. [2021-11-07 02:18:57,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:57,661 INFO L276 IsEmpty]: Start isEmpty. Operand 2436 states and 3234 transitions. [2021-11-07 02:18:57,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 02:18:57,666 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:57,667 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:57,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:57,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:57,890 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:18:57,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:57,891 INFO L85 PathProgramCache]: Analyzing trace with hash -93959336, now seen corresponding path program 1 times [2021-11-07 02:18:57,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:57,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [818996040] [2021-11-07 02:18:57,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:57,893 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:57,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:57,894 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:57,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:18:58,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:58,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 777 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:18:58,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:59,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:59,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:59,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:59,262 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:59,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [818996040] [2021-11-07 02:18:59,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [818996040] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:59,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:59,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:18:59,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397982796] [2021-11-07 02:18:59,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:18:59,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:59,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:18:59,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:18:59,264 INFO L87 Difference]: Start difference. First operand 2436 states and 3234 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:59,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:59,460 INFO L93 Difference]: Finished difference Result 2436 states and 3234 transitions. [2021-11-07 02:18:59,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:18:59,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-07 02:18:59,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:59,480 INFO L225 Difference]: With dead ends: 2436 [2021-11-07 02:18:59,480 INFO L226 Difference]: Without dead ends: 2434 [2021-11-07 02:18:59,484 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:18:59,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2434 states. [2021-11-07 02:18:59,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2434 to 2434. [2021-11-07 02:18:59,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2434 states, 2353 states have (on average 1.3225669358266043) internal successors, (3112), 2361 states have internal predecessors, (3112), 48 states have call successors, (48), 30 states have call predecessors, (48), 30 states have return successors, (72), 48 states have call predecessors, (72), 48 states have call successors, (72) [2021-11-07 02:18:59,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2434 states to 2434 states and 3232 transitions. [2021-11-07 02:18:59,680 INFO L78 Accepts]: Start accepts. Automaton has 2434 states and 3232 transitions. Word has length 28 [2021-11-07 02:18:59,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:59,680 INFO L470 AbstractCegarLoop]: Abstraction has 2434 states and 3232 transitions. [2021-11-07 02:18:59,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:59,681 INFO L276 IsEmpty]: Start isEmpty. Operand 2434 states and 3232 transitions. [2021-11-07 02:18:59,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 02:18:59,683 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:59,683 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] [2021-11-07 02:18:59,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:59,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:59,905 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:18:59,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:59,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1382227631, now seen corresponding path program 1 times [2021-11-07 02:18:59,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:59,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1231318357] [2021-11-07 02:18:59,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:59,908 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:59,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:59,910 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:59,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:19:00,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:00,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:19:00,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:00,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:00,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:01,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:01,123 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:01,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1231318357] [2021-11-07 02:19:01,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1231318357] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:01,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:01,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:19:01,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004329092] [2021-11-07 02:19:01,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:19:01,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:01,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:19:01,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:19:01,126 INFO L87 Difference]: Start difference. First operand 2434 states and 3232 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:01,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:01,313 INFO L93 Difference]: Finished difference Result 2434 states and 3232 transitions. [2021-11-07 02:19:01,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:19:01,314 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-07 02:19:01,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:01,333 INFO L225 Difference]: With dead ends: 2434 [2021-11-07 02:19:01,333 INFO L226 Difference]: Without dead ends: 2432 [2021-11-07 02:19:01,335 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:19:01,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2021-11-07 02:19:01,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 2432. [2021-11-07 02:19:01,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2432 states, 2352 states have (on average 1.3222789115646258) internal successors, (3110), 2359 states have internal predecessors, (3110), 48 states have call successors, (48), 30 states have call predecessors, (48), 30 states have return successors, (72), 48 states have call predecessors, (72), 48 states have call successors, (72) [2021-11-07 02:19:01,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2432 states to 2432 states and 3230 transitions. [2021-11-07 02:19:01,583 INFO L78 Accepts]: Start accepts. Automaton has 2432 states and 3230 transitions. Word has length 29 [2021-11-07 02:19:01,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:01,583 INFO L470 AbstractCegarLoop]: Abstraction has 2432 states and 3230 transitions. [2021-11-07 02:19:01,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:01,584 INFO L276 IsEmpty]: Start isEmpty. Operand 2432 states and 3230 transitions. [2021-11-07 02:19:01,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 02:19:01,587 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:01,587 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] [2021-11-07 02:19:01,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:01,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:01,809 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:19:01,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:01,810 INFO L85 PathProgramCache]: Analyzing trace with hash -100616638, now seen corresponding path program 1 times [2021-11-07 02:19:01,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:01,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [374118319] [2021-11-07 02:19:01,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:01,811 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:01,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:01,812 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:01,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:19:02,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:02,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:19:02,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:02,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:02,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:03,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:03,059 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:03,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [374118319] [2021-11-07 02:19:03,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [374118319] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:03,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:03,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:19:03,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114490972] [2021-11-07 02:19:03,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:19:03,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:03,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:19:03,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:19:03,062 INFO L87 Difference]: Start difference. First operand 2432 states and 3230 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:03,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:03,208 INFO L93 Difference]: Finished difference Result 2432 states and 3230 transitions. [2021-11-07 02:19:03,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:19:03,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-07 02:19:03,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:03,225 INFO L225 Difference]: With dead ends: 2432 [2021-11-07 02:19:03,225 INFO L226 Difference]: Without dead ends: 2423 [2021-11-07 02:19:03,227 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:19:03,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2021-11-07 02:19:03,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 2423. [2021-11-07 02:19:03,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2423 states, 2344 states have (on average 1.322098976109215) internal successors, (3099), 2350 states have internal predecessors, (3099), 48 states have call successors, (48), 30 states have call predecessors, (48), 30 states have return successors, (72), 48 states have call predecessors, (72), 48 states have call successors, (72) [2021-11-07 02:19:03,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 3219 transitions. [2021-11-07 02:19:03,452 INFO L78 Accepts]: Start accepts. Automaton has 2423 states and 3219 transitions. Word has length 30 [2021-11-07 02:19:03,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:03,453 INFO L470 AbstractCegarLoop]: Abstraction has 2423 states and 3219 transitions. [2021-11-07 02:19:03,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:03,453 INFO L276 IsEmpty]: Start isEmpty. Operand 2423 states and 3219 transitions. [2021-11-07 02:19:03,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 02:19:03,459 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:03,460 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:19:03,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:03,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:03,681 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:19:03,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:03,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1936011870, now seen corresponding path program 1 times [2021-11-07 02:19:03,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:03,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [648365716] [2021-11-07 02:19:03,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:03,683 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:03,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:03,684 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:03,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:19:04,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:04,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 1091 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:19:04,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:05,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:05,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:05,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:05,532 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:05,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [648365716] [2021-11-07 02:19:05,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [648365716] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:05,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:05,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:19:05,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522755945] [2021-11-07 02:19:05,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:19:05,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:05,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:19:05,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:19:05,535 INFO L87 Difference]: Start difference. First operand 2423 states and 3219 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:06,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:06,057 INFO L93 Difference]: Finished difference Result 6226 states and 8309 transitions. [2021-11-07 02:19:06,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:19:06,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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 87 [2021-11-07 02:19:06,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:06,088 INFO L225 Difference]: With dead ends: 6226 [2021-11-07 02:19:06,088 INFO L226 Difference]: Without dead ends: 3821 [2021-11-07 02:19:06,095 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:19:06,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3821 states. [2021-11-07 02:19:06,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3821 to 3813. [2021-11-07 02:19:06,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3813 states, 3656 states have (on average 1.3287746170678336) internal successors, (4858), 3668 states have internal predecessors, (4858), 96 states have call successors, (96), 60 states have call predecessors, (96), 60 states have return successors, (144), 96 states have call predecessors, (144), 96 states have call successors, (144) [2021-11-07 02:19:06,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 5098 transitions. [2021-11-07 02:19:06,409 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 5098 transitions. Word has length 87 [2021-11-07 02:19:06,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:06,409 INFO L470 AbstractCegarLoop]: Abstraction has 3813 states and 5098 transitions. [2021-11-07 02:19:06,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:06,410 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 5098 transitions. [2021-11-07 02:19:06,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-07 02:19:06,420 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:06,420 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:19:06,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:06,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:06,637 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:19:06,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:06,638 INFO L85 PathProgramCache]: Analyzing trace with hash 2137294049, now seen corresponding path program 1 times [2021-11-07 02:19:06,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:06,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1791991639] [2021-11-07 02:19:06,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:06,640 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:06,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:06,642 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:06,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:19:07,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:07,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 1112 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:19:07,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:08,349 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:19:08,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:08,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:19:08,841 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:08,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1791991639] [2021-11-07 02:19:08,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1791991639] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:08,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:08,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:19:08,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301603787] [2021-11-07 02:19:08,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:19:08,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:08,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:19:08,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:19:08,844 INFO L87 Difference]: Start difference. First operand 3813 states and 5098 transitions. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:09,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:09,914 INFO L93 Difference]: Finished difference Result 9825 states and 13206 transitions. [2021-11-07 02:19:09,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:19:09,915 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-07 02:19:09,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:09,960 INFO L225 Difference]: With dead ends: 9825 [2021-11-07 02:19:09,960 INFO L226 Difference]: Without dead ends: 6018 [2021-11-07 02:19:09,971 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:19:09,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6018 states. [2021-11-07 02:19:10,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6018 to 3813. [2021-11-07 02:19:10,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3813 states, 3656 states have (on average 1.3271334792122538) internal successors, (4852), 3668 states have internal predecessors, (4852), 96 states have call successors, (96), 60 states have call predecessors, (96), 60 states have return successors, (144), 96 states have call predecessors, (144), 96 states have call successors, (144) [2021-11-07 02:19:10,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 5092 transitions. [2021-11-07 02:19:10,364 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 5092 transitions. Word has length 95 [2021-11-07 02:19:10,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:10,364 INFO L470 AbstractCegarLoop]: Abstraction has 3813 states and 5092 transitions. [2021-11-07 02:19:10,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:10,365 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 5092 transitions. [2021-11-07 02:19:10,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-07 02:19:10,373 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:10,373 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:19:10,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:10,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:10,586 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:19:10,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:10,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1149390467, now seen corresponding path program 1 times [2021-11-07 02:19:10,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:10,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2035548283] [2021-11-07 02:19:10,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:10,588 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:10,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:10,589 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:10,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:19:11,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:11,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 1123 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:19:11,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:12,330 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:19:12,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:12,721 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:19:12,721 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:12,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2035548283] [2021-11-07 02:19:12,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2035548283] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:12,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:12,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:19:12,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101150613] [2021-11-07 02:19:12,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:19:12,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:12,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:19:12,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:19:12,724 INFO L87 Difference]: Start difference. First operand 3813 states and 5092 transitions. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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 02:19:14,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:14,435 INFO L93 Difference]: Finished difference Result 12975 states and 17558 transitions. [2021-11-07 02:19:14,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:19:14,437 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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 97 [2021-11-07 02:19:14,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:14,512 INFO L225 Difference]: With dead ends: 12975 [2021-11-07 02:19:14,512 INFO L226 Difference]: Without dead ends: 9180 [2021-11-07 02:19:14,524 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:19:14,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9180 states. [2021-11-07 02:19:15,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9180 to 3831. [2021-11-07 02:19:15,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3831 states, 3674 states have (on average 1.3255307566684813) internal successors, (4870), 3686 states have internal predecessors, (4870), 96 states have call successors, (96), 60 states have call predecessors, (96), 60 states have return successors, (144), 96 states have call predecessors, (144), 96 states have call successors, (144) [2021-11-07 02:19:15,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3831 states to 3831 states and 5110 transitions. [2021-11-07 02:19:15,110 INFO L78 Accepts]: Start accepts. Automaton has 3831 states and 5110 transitions. Word has length 97 [2021-11-07 02:19:15,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:15,111 INFO L470 AbstractCegarLoop]: Abstraction has 3831 states and 5110 transitions. [2021-11-07 02:19:15,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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 02:19:15,112 INFO L276 IsEmpty]: Start isEmpty. Operand 3831 states and 5110 transitions. [2021-11-07 02:19:15,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-07 02:19:15,129 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:15,129 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:19:15,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-11-07 02:19:15,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:15,353 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:19:15,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:15,354 INFO L85 PathProgramCache]: Analyzing trace with hash -597284135, now seen corresponding path program 1 times [2021-11-07 02:19:15,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:15,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [734487348] [2021-11-07 02:19:15,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:15,356 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:15,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:15,357 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:15,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:19:16,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:16,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 1134 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:19:16,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:17,242 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:19:17,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:17,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:19:17,733 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:17,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [734487348] [2021-11-07 02:19:17,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [734487348] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:17,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:17,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:19:17,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122343822] [2021-11-07 02:19:17,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:19:17,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:17,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:19:17,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:19:17,736 INFO L87 Difference]: Start difference. First operand 3831 states and 5110 transitions. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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 02:19:19,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:19,992 INFO L93 Difference]: Finished difference Result 16125 states and 21886 transitions. [2021-11-07 02:19:19,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:19:19,994 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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 99 [2021-11-07 02:19:19,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:20,046 INFO L225 Difference]: With dead ends: 16125 [2021-11-07 02:19:20,046 INFO L226 Difference]: Without dead ends: 12312 [2021-11-07 02:19:20,059 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:19:20,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12312 states. [2021-11-07 02:19:20,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12312 to 3849. [2021-11-07 02:19:20,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3849 states, 3692 states have (on average 1.323943661971831) internal successors, (4888), 3704 states have internal predecessors, (4888), 96 states have call successors, (96), 60 states have call predecessors, (96), 60 states have return successors, (144), 96 states have call predecessors, (144), 96 states have call successors, (144) [2021-11-07 02:19:20,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3849 states to 3849 states and 5128 transitions. [2021-11-07 02:19:20,780 INFO L78 Accepts]: Start accepts. Automaton has 3849 states and 5128 transitions. Word has length 99 [2021-11-07 02:19:20,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:20,781 INFO L470 AbstractCegarLoop]: Abstraction has 3849 states and 5128 transitions. [2021-11-07 02:19:20,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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 02:19:20,782 INFO L276 IsEmpty]: Start isEmpty. Operand 3849 states and 5128 transitions. [2021-11-07 02:19:20,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-07 02:19:20,796 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:20,796 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:19:20,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:21,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:21,013 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:19:21,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:21,014 INFO L85 PathProgramCache]: Analyzing trace with hash -603087755, now seen corresponding path program 1 times [2021-11-07 02:19:21,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:21,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [228404855] [2021-11-07 02:19:21,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:21,016 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:21,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:21,018 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:21,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:19:22,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:22,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 1145 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:19:22,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:22,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:19:22,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:23,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:19:23,199 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:23,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [228404855] [2021-11-07 02:19:23,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [228404855] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:23,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:23,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:19:23,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715585218] [2021-11-07 02:19:23,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:19:23,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:23,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:19:23,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:19:23,202 INFO L87 Difference]: Start difference. First operand 3849 states and 5128 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 02:19:23,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:23,550 INFO L93 Difference]: Finished difference Result 7686 states and 10247 transitions. [2021-11-07 02:19:23,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:19:23,551 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 101 [2021-11-07 02:19:23,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:23,565 INFO L225 Difference]: With dead ends: 7686 [2021-11-07 02:19:23,566 INFO L226 Difference]: Without dead ends: 3855 [2021-11-07 02:19:23,575 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:19:23,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3855 states. [2021-11-07 02:19:23,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3855 to 3855. [2021-11-07 02:19:23,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3855 states, 3698 states have (on average 1.3234180638182802) internal successors, (4894), 3710 states have internal predecessors, (4894), 96 states have call successors, (96), 60 states have call predecessors, (96), 60 states have return successors, (144), 96 states have call predecessors, (144), 96 states have call successors, (144) [2021-11-07 02:19:23,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3855 states to 3855 states and 5134 transitions. [2021-11-07 02:19:23,959 INFO L78 Accepts]: Start accepts. Automaton has 3855 states and 5134 transitions. Word has length 101 [2021-11-07 02:19:23,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:23,960 INFO L470 AbstractCegarLoop]: Abstraction has 3855 states and 5134 transitions. [2021-11-07 02:19:23,960 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 02:19:23,960 INFO L276 IsEmpty]: Start isEmpty. Operand 3855 states and 5134 transitions. [2021-11-07 02:19:23,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-07 02:19:23,971 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:23,971 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:19:24,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:24,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:24,185 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:19:24,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:24,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1325184947, now seen corresponding path program 1 times [2021-11-07 02:19:24,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:24,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2023134074] [2021-11-07 02:19:24,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:24,188 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:24,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:24,189 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:24,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:19:25,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:25,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 1147 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 02:19:25,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:26,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:19:26,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:26,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:19:26,848 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:26,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2023134074] [2021-11-07 02:19:26,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2023134074] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:26,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:26,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-07 02:19:26,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333233340] [2021-11-07 02:19:26,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:19:26,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:26,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:19:26,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:19:26,852 INFO L87 Difference]: Start difference. First operand 3855 states and 5134 transitions. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 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 02:19:28,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:28,884 INFO L93 Difference]: Finished difference Result 13095 states and 17648 transitions. [2021-11-07 02:19:28,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:19:28,885 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 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 101 [2021-11-07 02:19:28,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:28,915 INFO L225 Difference]: With dead ends: 13095 [2021-11-07 02:19:28,915 INFO L226 Difference]: Without dead ends: 9258 [2021-11-07 02:19:28,927 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:19:28,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9258 states. [2021-11-07 02:19:29,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9258 to 3879. [2021-11-07 02:19:29,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3879 states, 3722 states have (on average 1.3213326168726491) internal successors, (4918), 3734 states have internal predecessors, (4918), 96 states have call successors, (96), 60 states have call predecessors, (96), 60 states have return successors, (144), 96 states have call predecessors, (144), 96 states have call successors, (144) [2021-11-07 02:19:29,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3879 states to 3879 states and 5158 transitions. [2021-11-07 02:19:29,569 INFO L78 Accepts]: Start accepts. Automaton has 3879 states and 5158 transitions. Word has length 101 [2021-11-07 02:19:29,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:29,569 INFO L470 AbstractCegarLoop]: Abstraction has 3879 states and 5158 transitions. [2021-11-07 02:19:29,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 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 02:19:29,570 INFO L276 IsEmpty]: Start isEmpty. Operand 3879 states and 5158 transitions. [2021-11-07 02:19:29,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-07 02:19:29,580 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:29,580 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:19:29,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:29,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:29,793 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:19:29,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:29,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1428575983, now seen corresponding path program 1 times [2021-11-07 02:19:29,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:29,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1832820370] [2021-11-07 02:19:29,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:29,795 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:29,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:29,796 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:29,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:19:31,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:31,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 1158 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:19:31,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:31,694 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:19:31,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:31,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:19:31,980 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:31,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1832820370] [2021-11-07 02:19:31,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1832820370] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:31,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:31,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:19:31,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61787316] [2021-11-07 02:19:31,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:19:31,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:31,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:19:31,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:19:31,983 INFO L87 Difference]: Start difference. First operand 3879 states and 5158 transitions. Second operand has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:33,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:33,530 INFO L93 Difference]: Finished difference Result 14466 states and 19563 transitions. [2021-11-07 02:19:33,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:19:33,531 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 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 02:19:33,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:33,567 INFO L225 Difference]: With dead ends: 14466 [2021-11-07 02:19:33,567 INFO L226 Difference]: Without dead ends: 10605 [2021-11-07 02:19:33,579 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:19:33,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10605 states. [2021-11-07 02:19:34,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10605 to 3897. [2021-11-07 02:19:34,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3897 states, 3740 states have (on average 1.3197860962566845) internal successors, (4936), 3752 states have internal predecessors, (4936), 96 states have call successors, (96), 60 states have call predecessors, (96), 60 states have return successors, (144), 96 states have call predecessors, (144), 96 states have call successors, (144) [2021-11-07 02:19:34,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3897 states to 3897 states and 5176 transitions. [2021-11-07 02:19:34,260 INFO L78 Accepts]: Start accepts. Automaton has 3897 states and 5176 transitions. Word has length 103 [2021-11-07 02:19:34,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:34,261 INFO L470 AbstractCegarLoop]: Abstraction has 3897 states and 5176 transitions. [2021-11-07 02:19:34,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:34,261 INFO L276 IsEmpty]: Start isEmpty. Operand 3897 states and 5176 transitions. [2021-11-07 02:19:34,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-07 02:19:34,272 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:34,274 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:19:34,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:34,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:34,501 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:19:34,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:34,502 INFO L85 PathProgramCache]: Analyzing trace with hash -74915860, now seen corresponding path program 1 times [2021-11-07 02:19:34,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:34,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1319227874] [2021-11-07 02:19:34,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:34,504 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:34,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:34,506 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:34,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:19:36,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:36,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 1179 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:19:36,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:36,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:19:36,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:36,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:19:36,848 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:36,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1319227874] [2021-11-07 02:19:36,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1319227874] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:36,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:36,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:19:36,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880712887] [2021-11-07 02:19:36,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:19:36,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:36,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:19:36,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:19:36,850 INFO L87 Difference]: Start difference. First operand 3897 states and 5176 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:37,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:37,804 INFO L93 Difference]: Finished difference Result 9729 states and 12978 transitions. [2021-11-07 02:19:37,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:19:37,806 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 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 109 [2021-11-07 02:19:37,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:37,821 INFO L225 Difference]: With dead ends: 9729 [2021-11-07 02:19:37,821 INFO L226 Difference]: Without dead ends: 5850 [2021-11-07 02:19:37,832 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:19:37,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5850 states. [2021-11-07 02:19:38,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5850 to 3879. [2021-11-07 02:19:38,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3879 states, 3722 states have (on average 1.3164965072541643) internal successors, (4900), 3734 states have internal predecessors, (4900), 96 states have call successors, (96), 60 states have call predecessors, (96), 60 states have return successors, (144), 96 states have call predecessors, (144), 96 states have call successors, (144) [2021-11-07 02:19:38,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3879 states to 3879 states and 5140 transitions. [2021-11-07 02:19:38,480 INFO L78 Accepts]: Start accepts. Automaton has 3879 states and 5140 transitions. Word has length 109 [2021-11-07 02:19:38,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:38,481 INFO L470 AbstractCegarLoop]: Abstraction has 3879 states and 5140 transitions. [2021-11-07 02:19:38,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:38,481 INFO L276 IsEmpty]: Start isEmpty. Operand 3879 states and 5140 transitions. [2021-11-07 02:19:38,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-07 02:19:38,491 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:38,491 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:19:38,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:38,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:38,705 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:19:38,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:38,706 INFO L85 PathProgramCache]: Analyzing trace with hash -593241108, now seen corresponding path program 1 times [2021-11-07 02:19:38,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:38,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1331784226] [2021-11-07 02:19:38,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:38,708 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:38,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:38,710 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:38,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:19:40,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:41,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 1179 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:19:41,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:41,395 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:19:41,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:41,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:19:41,708 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:41,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1331784226] [2021-11-07 02:19:41,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1331784226] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:41,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:41,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:19:41,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399392228] [2021-11-07 02:19:41,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:19:41,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:41,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:19:41,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:19:41,710 INFO L87 Difference]: Start difference. First operand 3879 states and 5140 transitions. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:48,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:48,394 INFO L93 Difference]: Finished difference Result 7746 states and 10271 transitions. [2021-11-07 02:19:48,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:19:48,395 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 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 109 [2021-11-07 02:19:48,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:48,407 INFO L225 Difference]: With dead ends: 7746 [2021-11-07 02:19:48,407 INFO L226 Difference]: Without dead ends: 3885 [2021-11-07 02:19:48,420 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:19:48,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3885 states. [2021-11-07 02:19:49,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3885 to 3885. [2021-11-07 02:19:49,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3885 states, 3728 states have (on average 1.3159871244635193) internal successors, (4906), 3740 states have internal predecessors, (4906), 96 states have call successors, (96), 60 states have call predecessors, (96), 60 states have return successors, (144), 96 states have call predecessors, (144), 96 states have call successors, (144) [2021-11-07 02:19:49,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3885 states to 3885 states and 5146 transitions. [2021-11-07 02:19:49,072 INFO L78 Accepts]: Start accepts. Automaton has 3885 states and 5146 transitions. Word has length 109 [2021-11-07 02:19:49,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:49,073 INFO L470 AbstractCegarLoop]: Abstraction has 3885 states and 5146 transitions. [2021-11-07 02:19:49,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:49,073 INFO L276 IsEmpty]: Start isEmpty. Operand 3885 states and 5146 transitions. [2021-11-07 02:19:49,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-07 02:19:49,082 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:49,083 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:19:49,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:49,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:49,309 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:19:49,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:49,310 INFO L85 PathProgramCache]: Analyzing trace with hash 937960112, now seen corresponding path program 1 times [2021-11-07 02:19:49,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:49,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [94145314] [2021-11-07 02:19:49,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:49,312 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:49,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:49,314 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:49,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:19:51,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:51,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 1209 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:19:51,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:52,130 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:19:52,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:52,523 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:19:52,523 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:52,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [94145314] [2021-11-07 02:19:52,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [94145314] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:19:52,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [457510118] [2021-11-07 02:19:52,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:52,524 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:19:52,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:19:52,526 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:19:52,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 02:19:54,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:54,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 1209 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:19:54,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:54,567 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:19:54,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:54,989 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:19:54,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [457510118] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:54,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:19:54,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-07 02:19:54,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110045796] [2021-11-07 02:19:54,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:19:54,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:54,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:19:54,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:19:54,992 INFO L87 Difference]: Start difference. First operand 3885 states and 5146 transitions. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:02,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:02,383 INFO L93 Difference]: Finished difference Result 24651 states and 33000 transitions. [2021-11-07 02:20:02,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-07 02:20:02,384 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 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 110 [2021-11-07 02:20:02,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:02,440 INFO L225 Difference]: With dead ends: 24651 [2021-11-07 02:20:02,440 INFO L226 Difference]: Without dead ends: 20784 [2021-11-07 02:20:02,455 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=324, Invalid=1398, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 02:20:02,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20784 states. [2021-11-07 02:20:03,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20784 to 3909. [2021-11-07 02:20:03,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3909 states, 3752 states have (on average 1.3139658848614073) internal successors, (4930), 3764 states have internal predecessors, (4930), 96 states have call successors, (96), 60 states have call predecessors, (96), 60 states have return successors, (144), 96 states have call predecessors, (144), 96 states have call successors, (144) [2021-11-07 02:20:03,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3909 states to 3909 states and 5170 transitions. [2021-11-07 02:20:03,410 INFO L78 Accepts]: Start accepts. Automaton has 3909 states and 5170 transitions. Word has length 110 [2021-11-07 02:20:03,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:03,410 INFO L470 AbstractCegarLoop]: Abstraction has 3909 states and 5170 transitions. [2021-11-07 02:20:03,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:03,411 INFO L276 IsEmpty]: Start isEmpty. Operand 3909 states and 5170 transitions. [2021-11-07 02:20:03,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-07 02:20:03,419 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:03,419 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:03,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:03,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:03,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:20:03,833 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:20:03,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:03,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1639024690, now seen corresponding path program 1 times [2021-11-07 02:20:03,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:03,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1170697447] [2021-11-07 02:20:03,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:03,836 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:03,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:03,838 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:03,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 02:20:05,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:06,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 1207 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:20:06,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:06,380 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:20:06,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:06,814 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:20:06,815 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:06,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1170697447] [2021-11-07 02:20:06,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1170697447] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:20:06,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [97311535] [2021-11-07 02:20:06,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:06,816 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:20:06,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:20:06,817 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:20:06,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 02:20:08,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:08,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 1207 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 02:20:08,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:09,355 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:20:09,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:09,849 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:20:09,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [97311535] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:09,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:20:09,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 4] imperfect sequences [5, 5] total 16 [2021-11-07 02:20:09,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485691008] [2021-11-07 02:20:09,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:20:09,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:09,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:20:09,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:20:09,853 INFO L87 Difference]: Start difference. First operand 3909 states and 5170 transitions. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:17,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:17,153 INFO L93 Difference]: Finished difference Result 18875 states and 25270 transitions. [2021-11-07 02:20:17,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-07 02:20:17,154 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 10 states have internal predecessors, (120), 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 110 [2021-11-07 02:20:17,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:17,184 INFO L225 Difference]: With dead ends: 18875 [2021-11-07 02:20:17,185 INFO L226 Difference]: Without dead ends: 14984 [2021-11-07 02:20:17,196 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=350, Invalid=1720, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 02:20:17,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14984 states. [2021-11-07 02:20:18,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14984 to 3957. [2021-11-07 02:20:18,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3957 states, 3800 states have (on average 1.313157894736842) internal successors, (4990), 3812 states have internal predecessors, (4990), 96 states have call successors, (96), 60 states have call predecessors, (96), 60 states have return successors, (144), 96 states have call predecessors, (144), 96 states have call successors, (144) [2021-11-07 02:20:18,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3957 states to 3957 states and 5230 transitions. [2021-11-07 02:20:18,367 INFO L78 Accepts]: Start accepts. Automaton has 3957 states and 5230 transitions. Word has length 110 [2021-11-07 02:20:18,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:18,368 INFO L470 AbstractCegarLoop]: Abstraction has 3957 states and 5230 transitions. [2021-11-07 02:20:18,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:18,368 INFO L276 IsEmpty]: Start isEmpty. Operand 3957 states and 5230 transitions. [2021-11-07 02:20:18,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-07 02:20:18,376 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:18,377 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:18,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:18,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:18,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:20:18,792 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:20:18,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:18,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1176413654, now seen corresponding path program 1 times [2021-11-07 02:20:18,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:18,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [427198051] [2021-11-07 02:20:18,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:18,795 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:18,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:18,797 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:18,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 02:20:21,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:21,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 1218 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:20:21,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:21,490 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:20:21,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:21,863 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:20:21,863 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:21,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [427198051] [2021-11-07 02:20:21,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [427198051] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:20:21,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1817804750] [2021-11-07 02:20:21,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:21,863 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:20:21,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:20:21,864 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:20:21,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-07 02:20:23,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:23,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 1218 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:20:23,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:24,059 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:20:24,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:24,401 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:20:24,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1817804750] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:24,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:20:24,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 13 [2021-11-07 02:20:24,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009097794] [2021-11-07 02:20:24,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:20:24,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:24,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:20:24,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:20:24,404 INFO L87 Difference]: Start difference. First operand 3957 states and 5230 transitions. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:30,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:30,276 INFO L93 Difference]: Finished difference Result 11676 states and 15523 transitions. [2021-11-07 02:20:30,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:20:30,277 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 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 112 [2021-11-07 02:20:30,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:30,291 INFO L225 Difference]: With dead ends: 11676 [2021-11-07 02:20:30,291 INFO L226 Difference]: Without dead ends: 7737 [2021-11-07 02:20:30,301 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:20:30,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7737 states. [2021-11-07 02:20:31,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7737 to 3963. [2021-11-07 02:20:31,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3963 states, 3806 states have (on average 1.3126642143983185) internal successors, (4996), 3818 states have internal predecessors, (4996), 96 states have call successors, (96), 60 states have call predecessors, (96), 60 states have return successors, (144), 96 states have call predecessors, (144), 96 states have call successors, (144) [2021-11-07 02:20:31,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3963 states to 3963 states and 5236 transitions. [2021-11-07 02:20:31,394 INFO L78 Accepts]: Start accepts. Automaton has 3963 states and 5236 transitions. Word has length 112 [2021-11-07 02:20:31,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:31,395 INFO L470 AbstractCegarLoop]: Abstraction has 3963 states and 5236 transitions. [2021-11-07 02:20:31,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:31,395 INFO L276 IsEmpty]: Start isEmpty. Operand 3963 states and 5236 transitions. [2021-11-07 02:20:31,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-07 02:20:31,403 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:31,403 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:31,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:31,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:31,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:20:31,817 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:20:31,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:31,818 INFO L85 PathProgramCache]: Analyzing trace with hash -56792432, now seen corresponding path program 1 times [2021-11-07 02:20:31,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:31,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [513228595] [2021-11-07 02:20:31,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:31,820 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:31,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:31,821 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:31,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 02:20:34,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:34,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 1225 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:20:34,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:34,461 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:20:34,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:34,918 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:20:34,918 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:34,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [513228595] [2021-11-07 02:20:34,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [513228595] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:20:34,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [89789550] [2021-11-07 02:20:34,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:34,919 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:20:34,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:20:34,920 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:20:34,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-07 02:20:38,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:38,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 1225 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:20:38,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:38,397 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:20:38,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:38,663 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:20:38,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [89789550] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:20:38,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844999719] [2021-11-07 02:20:38,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:38,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:20:38,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:20:38,665 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:20:38,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-07 02:20:40,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:40,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 1225 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 02:20:40,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:41,323 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:20:41,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:42,312 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:20:42,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844999719] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:42,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 02:20:42,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5, 5, 5] total 22 [2021-11-07 02:20:42,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652918820] [2021-11-07 02:20:42,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 02:20:42,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:42,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 02:20:42,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-11-07 02:20:42,314 INFO L87 Difference]: Start difference. First operand 3963 states and 5236 transitions. Second operand has 16 states, 16 states have (on average 7.6875) internal successors, (123), 16 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:07,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:07,997 INFO L93 Difference]: Finished difference Result 25411 states and 34051 transitions. [2021-11-07 02:21:07,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-07 02:21:07,998 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.6875) internal successors, (123), 16 states have internal predecessors, (123), 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 113 [2021-11-07 02:21:07,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:08,027 INFO L225 Difference]: With dead ends: 25411 [2021-11-07 02:21:08,027 INFO L226 Difference]: Without dead ends: 21466 [2021-11-07 02:21:08,042 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 674 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=679, Invalid=2861, Unknown=0, NotChecked=0, Total=3540 [2021-11-07 02:21:08,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21466 states. [2021-11-07 02:21:09,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21466 to 3957. [2021-11-07 02:21:09,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3957 states, 3800 states have (on average 1.3092105263157894) internal successors, (4975), 3812 states have internal predecessors, (4975), 96 states have call successors, (96), 60 states have call predecessors, (96), 60 states have return successors, (144), 96 states have call predecessors, (144), 96 states have call successors, (144) [2021-11-07 02:21:09,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3957 states to 3957 states and 5215 transitions. [2021-11-07 02:21:09,190 INFO L78 Accepts]: Start accepts. Automaton has 3957 states and 5215 transitions. Word has length 113 [2021-11-07 02:21:09,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:09,190 INFO L470 AbstractCegarLoop]: Abstraction has 3957 states and 5215 transitions. [2021-11-07 02:21:09,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.6875) internal successors, (123), 16 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:09,190 INFO L276 IsEmpty]: Start isEmpty. Operand 3957 states and 5215 transitions. [2021-11-07 02:21:09,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-07 02:21:09,198 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:09,199 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:21:09,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:09,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:09,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:09,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:09,815 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:21:09,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:09,815 INFO L85 PathProgramCache]: Analyzing trace with hash -2136956994, now seen corresponding path program 1 times [2021-11-07 02:21:09,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:09,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1219710662] [2021-11-07 02:21:09,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:09,817 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:09,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:09,818 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:09,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 02:21:12,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:12,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 1259 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:21:12,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:12,471 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:21:12,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:12,851 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:21:12,851 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:12,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1219710662] [2021-11-07 02:21:12,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1219710662] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:21:12,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1223298842] [2021-11-07 02:21:12,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:12,852 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:21:12,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:21:12,853 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:21:12,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-07 02:21:14,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:14,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 1259 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 02:21:14,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:16,220 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:21:16,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:17,235 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:21:17,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1223298842] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:17,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:21:17,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 16 [2021-11-07 02:21:17,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587392122] [2021-11-07 02:21:17,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:21:17,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:17,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:21:17,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:21:17,237 INFO L87 Difference]: Start difference. First operand 3957 states and 5215 transitions. Second operand has 10 states, 10 states have (on average 21.1) internal successors, (211), 9 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:19,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:19,458 INFO L93 Difference]: Finished difference Result 8810 states and 11642 transitions. [2021-11-07 02:21:19,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:21:19,459 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 21.1) internal successors, (211), 9 states have internal predecessors, (211), 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 123 [2021-11-07 02:21:19,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:19,467 INFO L225 Difference]: With dead ends: 8810 [2021-11-07 02:21:19,468 INFO L226 Difference]: Without dead ends: 4871 [2021-11-07 02:21:19,474 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-11-07 02:21:19,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4871 states. [2021-11-07 02:21:20,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4871 to 3813. [2021-11-07 02:21:20,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3813 states, 3656 states have (on average 1.3107221006564551) internal successors, (4792), 3668 states have internal predecessors, (4792), 96 states have call successors, (96), 60 states have call predecessors, (96), 60 states have return successors, (144), 96 states have call predecessors, (144), 96 states have call successors, (144) [2021-11-07 02:21:20,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 5032 transitions. [2021-11-07 02:21:20,284 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 5032 transitions. Word has length 123 [2021-11-07 02:21:20,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:20,284 INFO L470 AbstractCegarLoop]: Abstraction has 3813 states and 5032 transitions. [2021-11-07 02:21:20,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 21.1) internal successors, (211), 9 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:20,285 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 5032 transitions. [2021-11-07 02:21:20,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-07 02:21:20,289 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:20,289 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:21:20,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:20,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-11-07 02:21:20,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:20,702 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:21:20,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:20,702 INFO L85 PathProgramCache]: Analyzing trace with hash 981860466, now seen corresponding path program 1 times [2021-11-07 02:21:20,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:20,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1229577301] [2021-11-07 02:21:20,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:20,704 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:20,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:20,706 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:20,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-07 02:21:23,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:23,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 1259 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:21:23,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:23,481 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:21:23,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:23,972 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:21:23,972 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:23,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1229577301] [2021-11-07 02:21:23,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1229577301] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:21:23,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1954679617] [2021-11-07 02:21:23,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:23,973 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:21:23,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:21:23,974 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:21:23,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-07 02:21:26,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:26,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 1259 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-07 02:21:26,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:27,309 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:21:27,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:28,503 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:21:28,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1954679617] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:28,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:21:28,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13, 9] imperfect sequences [5, 5] total 26 [2021-11-07 02:21:28,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707161353] [2021-11-07 02:21:28,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 02:21:28,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:28,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 02:21:28,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-11-07 02:21:28,506 INFO L87 Difference]: Start difference. First operand 3813 states and 5032 transitions. Second operand has 20 states, 20 states have (on average 7.05) internal successors, (141), 20 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:02,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:02,573 INFO L93 Difference]: Finished difference Result 22562 states and 30421 transitions. [2021-11-07 02:22:02,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-11-07 02:22:02,575 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 7.05) internal successors, (141), 20 states have internal predecessors, (141), 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 123 [2021-11-07 02:22:02,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:02,605 INFO L225 Difference]: With dead ends: 22562 [2021-11-07 02:22:02,605 INFO L226 Difference]: Without dead ends: 18767 [2021-11-07 02:22:02,615 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2870 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=2050, Invalid=8662, Unknown=0, NotChecked=0, Total=10712 [2021-11-07 02:22:02,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18767 states. [2021-11-07 02:22:03,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18767 to 3813. [2021-11-07 02:22:03,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3813 states, 3656 states have (on average 1.3099015317286653) internal successors, (4789), 3668 states have internal predecessors, (4789), 96 states have call successors, (96), 60 states have call predecessors, (96), 60 states have return successors, (144), 96 states have call predecessors, (144), 96 states have call successors, (144) [2021-11-07 02:22:03,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 5029 transitions. [2021-11-07 02:22:03,718 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 5029 transitions. Word has length 123 [2021-11-07 02:22:03,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:03,718 INFO L470 AbstractCegarLoop]: Abstraction has 3813 states and 5029 transitions. [2021-11-07 02:22:03,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.05) internal successors, (141), 20 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:03,719 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 5029 transitions. [2021-11-07 02:22:03,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-07 02:22:03,726 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:03,727 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:03,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:03,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:04,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:22:04,153 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:22:04,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:04,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1132167816, now seen corresponding path program 1 times [2021-11-07 02:22:04,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:04,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1363890742] [2021-11-07 02:22:04,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:04,156 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:04,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:04,157 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:04,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-07 02:22:06,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:07,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 1308 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:22:07,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:07,431 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:22:07,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:07,854 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:22:07,854 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:07,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1363890742] [2021-11-07 02:22:07,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1363890742] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:22:07,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1921463658] [2021-11-07 02:22:07,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:07,855 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:22:07,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:22:07,856 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:22:07,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-07 02:22:10,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:10,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 1308 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:22:10,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:10,757 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:22:10,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:11,044 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:22:11,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1921463658] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:11,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:22:11,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 02:22:11,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954236220] [2021-11-07 02:22:11,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:22:11,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:11,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:22:11,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:22:11,047 INFO L87 Difference]: Start difference. First operand 3813 states and 5029 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:13,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:13,745 INFO L93 Difference]: Finished difference Result 11262 states and 15025 transitions. [2021-11-07 02:22:13,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:22:13,747 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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 128 [2021-11-07 02:22:13,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:13,758 INFO L225 Difference]: With dead ends: 11262 [2021-11-07 02:22:13,758 INFO L226 Difference]: Without dead ends: 7467 [2021-11-07 02:22:13,763 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 501 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:22:13,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7467 states. [2021-11-07 02:22:14,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7467 to 3813. [2021-11-07 02:22:14,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3813 states, 3656 states have (on average 1.3090809628008753) internal successors, (4786), 3668 states have internal predecessors, (4786), 96 states have call successors, (96), 60 states have call predecessors, (96), 60 states have return successors, (144), 96 states have call predecessors, (144), 96 states have call successors, (144) [2021-11-07 02:22:14,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 5026 transitions. [2021-11-07 02:22:14,754 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 5026 transitions. Word has length 128 [2021-11-07 02:22:14,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:14,754 INFO L470 AbstractCegarLoop]: Abstraction has 3813 states and 5026 transitions. [2021-11-07 02:22:14,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:14,754 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 5026 transitions. [2021-11-07 02:22:14,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-07 02:22:14,758 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:14,759 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:14,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:14,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:15,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:15,160 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:22:15,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:15,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1264497863, now seen corresponding path program 1 times [2021-11-07 02:22:15,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:15,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542537432] [2021-11-07 02:22:15,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:15,163 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:15,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:15,164 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:15,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-07 02:22:17,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:18,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 1294 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:22:18,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:18,431 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:22:18,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:18,858 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:22:18,858 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:18,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542537432] [2021-11-07 02:22:18,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542537432] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:22:18,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1358715354] [2021-11-07 02:22:18,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:18,859 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:22:18,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:22:18,860 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:22:18,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-07 02:22:22,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:22,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 1294 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:22:22,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:23,202 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:22:23,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:23,526 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:22:23,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1358715354] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:22:23,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864758272] [2021-11-07 02:22:23,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:23,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:22:23,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:22:23,541 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:22:23,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-07 02:22:26,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:26,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 1294 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:22:26,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:26,575 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:22:26,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:26,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:22:26,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864758272] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:22:26,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:22:26,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-07 02:22:26,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101594646] [2021-11-07 02:22:26,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:22:26,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:26,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:22:26,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:22:26,864 INFO L87 Difference]: Start difference. First operand 3813 states and 5026 transitions. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:34,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:34,033 INFO L93 Difference]: Finished difference Result 7620 states and 10055 transitions. [2021-11-07 02:22:34,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:22:34,040 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 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 129 [2021-11-07 02:22:34,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:34,049 INFO L225 Difference]: With dead ends: 7620 [2021-11-07 02:22:34,049 INFO L226 Difference]: Without dead ends: 3825 [2021-11-07 02:22:34,057 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 769 GetRequests, 762 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:22:34,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3825 states. [2021-11-07 02:22:35,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3825 to 3825. [2021-11-07 02:22:35,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3825 states, 3668 states have (on average 1.3080697928026173) internal successors, (4798), 3680 states have internal predecessors, (4798), 96 states have call successors, (96), 60 states have call predecessors, (96), 60 states have return successors, (144), 96 states have call predecessors, (144), 96 states have call successors, (144) [2021-11-07 02:22:35,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3825 states to 3825 states and 5038 transitions. [2021-11-07 02:22:35,014 INFO L78 Accepts]: Start accepts. Automaton has 3825 states and 5038 transitions. Word has length 129 [2021-11-07 02:22:35,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:35,015 INFO L470 AbstractCegarLoop]: Abstraction has 3825 states and 5038 transitions. [2021-11-07 02:22:35,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:35,015 INFO L276 IsEmpty]: Start isEmpty. Operand 3825 states and 5038 transitions. [2021-11-07 02:22:35,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-07 02:22:35,021 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:35,021 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:35,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:35,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:35,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:35,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:35,634 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:22:35,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:35,635 INFO L85 PathProgramCache]: Analyzing trace with hash 2072399175, now seen corresponding path program 2 times [2021-11-07 02:22:35,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:35,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1361188550] [2021-11-07 02:22:35,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:22:35,636 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:35,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:35,637 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:35,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-07 02:23:03,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:23:03,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:23:04,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 1354 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:23:04,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:04,559 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:23:04,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:05,328 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:23:05,328 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:05,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1361188550] [2021-11-07 02:23:05,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1361188550] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:23:05,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1918677883] [2021-11-07 02:23:05,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:23:05,329 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:23:05,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:23:05,330 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:23:05,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-07 02:23:27,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:23:27,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:23:27,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 1354 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:23:27,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:27,865 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:23:27,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:28,198 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:23:28,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1918677883] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:23:28,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866078228] [2021-11-07 02:23:28,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:23:28,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:23:28,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:23:28,203 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:23:28,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-07 02:23:39,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:23:39,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:23:39,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 1354 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:23:39,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:40,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:23:40,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:41,151 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:23:41,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866078228] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:23:41,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:23:41,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 16 [2021-11-07 02:23:41,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108207984] [2021-11-07 02:23:41,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 02:23:41,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:41,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 02:23:41,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:23:41,155 INFO L87 Difference]: Start difference. First operand 3825 states and 5038 transitions. Second operand has 16 states, 16 states have (on average 8.8125) internal successors, (141), 16 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:03,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:03,867 INFO L93 Difference]: Finished difference Result 8531 states and 11264 transitions. [2021-11-07 02:24:03,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 02:24:03,869 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.8125) internal successors, (141), 16 states have internal predecessors, (141), 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 131 [2021-11-07 02:24:03,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:03,877 INFO L225 Difference]: With dead ends: 8531 [2021-11-07 02:24:03,877 INFO L226 Difference]: Without dead ends: 4724 [2021-11-07 02:24:03,883 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 783 GetRequests, 766 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-11-07 02:24:03,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4724 states. [2021-11-07 02:24:04,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4724 to 3843. [2021-11-07 02:24:04,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3843 states, 3686 states have (on average 1.3065653825284862) internal successors, (4816), 3698 states have internal predecessors, (4816), 96 states have call successors, (96), 60 states have call predecessors, (96), 60 states have return successors, (144), 96 states have call predecessors, (144), 96 states have call successors, (144) [2021-11-07 02:24:04,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3843 states to 3843 states and 5056 transitions. [2021-11-07 02:24:04,968 INFO L78 Accepts]: Start accepts. Automaton has 3843 states and 5056 transitions. Word has length 131 [2021-11-07 02:24:04,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:04,968 INFO L470 AbstractCegarLoop]: Abstraction has 3843 states and 5056 transitions. [2021-11-07 02:24:04,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.8125) internal successors, (141), 16 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:04,969 INFO L276 IsEmpty]: Start isEmpty. Operand 3843 states and 5056 transitions. [2021-11-07 02:24:04,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-07 02:24:04,973 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:04,974 INFO L513 BasicCegarLoop]: trace histogram [6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:24:05,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:05,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:05,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:05,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:24:05,575 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:24:05,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:05,576 INFO L85 PathProgramCache]: Analyzing trace with hash 2037842059, now seen corresponding path program 3 times [2021-11-07 02:24:05,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:05,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1929831980] [2021-11-07 02:24:05,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:24:05,578 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:05,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:05,583 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:05,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-07 02:24:46,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 02:24:46,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:24:47,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 1201 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 02:24:47,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:48,061 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 02:24:48,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:50,174 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 02:24:50,174 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:50,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1929831980] [2021-11-07 02:24:50,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1929831980] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:50,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:24:50,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-07 02:24:50,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431932622] [2021-11-07 02:24:50,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 02:24:50,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:50,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 02:24:50,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:24:50,177 INFO L87 Difference]: Start difference. First operand 3843 states and 5056 transitions. Second operand has 11 states, 11 states have (on average 13.454545454545455) internal successors, (148), 11 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:08,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:08,522 INFO L93 Difference]: Finished difference Result 14434 states and 19249 transitions. [2021-11-07 02:25:08,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 02:25:08,523 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.454545454545455) internal successors, (148), 11 states have internal predecessors, (148), 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 134 [2021-11-07 02:25:08,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:08,559 INFO L225 Difference]: With dead ends: 14434 [2021-11-07 02:25:08,560 INFO L226 Difference]: Without dead ends: 10552 [2021-11-07 02:25:08,567 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=151, Invalid=311, Unknown=0, NotChecked=0, Total=462 [2021-11-07 02:25:08,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10552 states. [2021-11-07 02:25:10,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10552 to 5473. [2021-11-07 02:25:10,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5473 states, 5251 states have (on average 1.3041325461816797) internal successors, (6848), 5268 states have internal predecessors, (6848), 136 states have call successors, (136), 85 states have call predecessors, (136), 85 states have return successors, (184), 136 states have call predecessors, (184), 136 states have call successors, (184) [2021-11-07 02:25:10,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5473 states to 5473 states and 7168 transitions. [2021-11-07 02:25:10,370 INFO L78 Accepts]: Start accepts. Automaton has 5473 states and 7168 transitions. Word has length 134 [2021-11-07 02:25:10,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:10,370 INFO L470 AbstractCegarLoop]: Abstraction has 5473 states and 7168 transitions. [2021-11-07 02:25:10,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.454545454545455) internal successors, (148), 11 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:10,371 INFO L276 IsEmpty]: Start isEmpty. Operand 5473 states and 7168 transitions. [2021-11-07 02:25:10,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-07 02:25:10,376 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:10,376 INFO L513 BasicCegarLoop]: trace histogram [6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:25:10,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:10,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:10,577 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:25:10,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:10,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1755713264, now seen corresponding path program 1 times [2021-11-07 02:25:10,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:10,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [925664134] [2021-11-07 02:25:10,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:10,580 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:10,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:10,581 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:10,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-07 02:25:15,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:15,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 1484 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 02:25:15,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:15,967 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 02:25:15,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:16,437 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 02:25:16,437 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:16,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [925664134] [2021-11-07 02:25:16,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [925664134] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:16,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:25:16,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:25:16,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401987870] [2021-11-07 02:25:16,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:25:16,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:16,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:25:16,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:25:16,439 INFO L87 Difference]: Start difference. First operand 5473 states and 7168 transitions. Second operand has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:30,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:30,542 INFO L93 Difference]: Finished difference Result 31688 states and 42329 transitions. [2021-11-07 02:25:30,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 02:25:30,543 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 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 135 [2021-11-07 02:25:30,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:30,612 INFO L225 Difference]: With dead ends: 31688 [2021-11-07 02:25:30,612 INFO L226 Difference]: Without dead ends: 26233 [2021-11-07 02:25:30,627 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:25:30,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26233 states. [2021-11-07 02:25:32,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26233 to 5491. [2021-11-07 02:25:32,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5491 states, 5269 states have (on average 1.3030935661415828) internal successors, (6866), 5286 states have internal predecessors, (6866), 136 states have call successors, (136), 85 states have call predecessors, (136), 85 states have return successors, (184), 136 states have call predecessors, (184), 136 states have call successors, (184) [2021-11-07 02:25:32,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5491 states to 5491 states and 7186 transitions. [2021-11-07 02:25:32,588 INFO L78 Accepts]: Start accepts. Automaton has 5491 states and 7186 transitions. Word has length 135 [2021-11-07 02:25:32,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:32,588 INFO L470 AbstractCegarLoop]: Abstraction has 5491 states and 7186 transitions. [2021-11-07 02:25:32,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:32,589 INFO L276 IsEmpty]: Start isEmpty. Operand 5491 states and 7186 transitions. [2021-11-07 02:25:32,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-07 02:25:32,594 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:32,594 INFO L513 BasicCegarLoop]: trace histogram [6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:25:32,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:32,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:32,795 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:25:32,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:32,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1241355092, now seen corresponding path program 1 times [2021-11-07 02:25:32,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:32,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1316141901] [2021-11-07 02:25:32,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:32,798 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:32,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:32,799 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:32,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-07 02:25:37,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:37,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 1495 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 02:25:37,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:38,063 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 02:25:38,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:38,530 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 02:25:38,530 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:38,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1316141901] [2021-11-07 02:25:38,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1316141901] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:38,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:25:38,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:25:38,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232426514] [2021-11-07 02:25:38,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:25:38,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:38,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:25:38,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:25:38,534 INFO L87 Difference]: Start difference. First operand 5491 states and 7186 transitions. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:51,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:51,043 INFO L93 Difference]: Finished difference Result 28080 states and 37486 transitions. [2021-11-07 02:25:51,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:25:51,044 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 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 137 [2021-11-07 02:25:51,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:51,110 INFO L225 Difference]: With dead ends: 28080 [2021-11-07 02:25:51,110 INFO L226 Difference]: Without dead ends: 22607 [2021-11-07 02:25:51,126 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:25:51,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22607 states. [2021-11-07 02:25:53,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22607 to 5509. [2021-11-07 02:25:53,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5509 states, 5287 states have (on average 1.3020616606771327) internal successors, (6884), 5304 states have internal predecessors, (6884), 136 states have call successors, (136), 85 states have call predecessors, (136), 85 states have return successors, (184), 136 states have call predecessors, (184), 136 states have call successors, (184) [2021-11-07 02:25:53,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5509 states to 5509 states and 7204 transitions. [2021-11-07 02:25:53,293 INFO L78 Accepts]: Start accepts. Automaton has 5509 states and 7204 transitions. Word has length 137 [2021-11-07 02:25:53,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:53,294 INFO L470 AbstractCegarLoop]: Abstraction has 5509 states and 7204 transitions. [2021-11-07 02:25:53,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:53,294 INFO L276 IsEmpty]: Start isEmpty. Operand 5509 states and 7204 transitions. [2021-11-07 02:25:53,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-07 02:25:53,301 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:53,301 INFO L513 BasicCegarLoop]: trace histogram [6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:25:53,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2021-11-07 02:25:53,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:53,502 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:25:53,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:53,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1708065218, now seen corresponding path program 1 times [2021-11-07 02:25:53,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:53,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [520324984] [2021-11-07 02:25:53,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:53,505 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:53,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:53,506 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:53,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-07 02:25:58,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:58,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 1458 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-07 02:25:58,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:59,850 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 02:25:59,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:26:02,543 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 02:26:02,543 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:26:02,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [520324984] [2021-11-07 02:26:02,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [520324984] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:26:02,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:26:02,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 20 [2021-11-07 02:26:02,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707990919] [2021-11-07 02:26:02,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 02:26:02,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:26:02,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 02:26:02,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-11-07 02:26:02,545 INFO L87 Difference]: Start difference. First operand 5509 states and 7204 transitions. Second operand has 20 states, 20 states have (on average 7.4) internal successors, (148), 20 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:33,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:26:33,483 INFO L93 Difference]: Finished difference Result 22987 states and 30976 transitions. [2021-11-07 02:26:33,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-07 02:26:33,485 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 7.4) internal successors, (148), 20 states have internal predecessors, (148), 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 137 [2021-11-07 02:26:33,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:26:33,523 INFO L225 Difference]: With dead ends: 22987 [2021-11-07 02:26:33,523 INFO L226 Difference]: Without dead ends: 17496 [2021-11-07 02:26:33,535 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=642, Invalid=1908, Unknown=0, NotChecked=0, Total=2550 [2021-11-07 02:26:33,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17496 states. [2021-11-07 02:26:35,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17496 to 3846. [2021-11-07 02:26:35,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3846 states, 3689 states have (on average 1.3046896177825968) internal successors, (4813), 3701 states have internal predecessors, (4813), 96 states have call successors, (96), 60 states have call predecessors, (96), 60 states have return successors, (144), 96 states have call predecessors, (144), 96 states have call successors, (144) [2021-11-07 02:26:35,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3846 states to 3846 states and 5053 transitions. [2021-11-07 02:26:35,185 INFO L78 Accepts]: Start accepts. Automaton has 3846 states and 5053 transitions. Word has length 137 [2021-11-07 02:26:35,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:26:35,186 INFO L470 AbstractCegarLoop]: Abstraction has 3846 states and 5053 transitions. [2021-11-07 02:26:35,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.4) internal successors, (148), 20 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:35,186 INFO L276 IsEmpty]: Start isEmpty. Operand 3846 states and 5053 transitions. [2021-11-07 02:26:35,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-07 02:26:35,190 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:26:35,190 INFO L513 BasicCegarLoop]: trace histogram [6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:26:35,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-07 02:26:35,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:26:35,391 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:26:35,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:26:35,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1018695192, now seen corresponding path program 1 times [2021-11-07 02:26:35,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:26:35,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1060390039] [2021-11-07 02:26:35,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:26:35,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:26:35,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:26:35,396 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:26:35,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-07 02:26:39,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:26:40,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 1506 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:26:40,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:26:41,025 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 02:26:41,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:26:41,901 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 02:26:41,901 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:26:41,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1060390039] [2021-11-07 02:26:41,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1060390039] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:26:41,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1623787325] [2021-11-07 02:26:41,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:26:41,902 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:26:41,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:26:41,904 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:26:41,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2021-11-07 02:26:46,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:26:46,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 1506 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:26:46,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:26:47,199 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 02:26:47,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:26:48,142 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 02:26:48,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1623787325] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:26:48,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475284393] [2021-11-07 02:26:48,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:26:48,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:26:48,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:26:48,144 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:26:48,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-07 02:26:52,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:26:52,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 1506 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:26:52,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:26:53,162 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 02:26:53,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:26:54,075 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 02:26:54,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475284393] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:26:54,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:26:54,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2021-11-07 02:26:54,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867390071] [2021-11-07 02:26:54,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:26:54,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:26:54,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:26:54,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:26:54,078 INFO L87 Difference]: Start difference. First operand 3846 states and 5053 transitions. Second operand has 6 states, 6 states have (on average 42.333333333333336) internal successors, (254), 6 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:27:05,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:27:05,822 INFO L93 Difference]: Finished difference Result 22981 states and 30207 transitions. [2021-11-07 02:27:05,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:27:05,824 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 42.333333333333336) internal successors, (254), 6 states have internal predecessors, (254), 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 139 [2021-11-07 02:27:05,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:27:05,868 INFO L225 Difference]: With dead ends: 22981 [2021-11-07 02:27:05,868 INFO L226 Difference]: Without dead ends: 22976 [2021-11-07 02:27:05,874 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 829 GetRequests, 824 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:27:05,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22976 states. [2021-11-07 02:27:14,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22976 to 22685. [2021-11-07 02:27:14,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22685 states, 21748 states have (on average 1.308028324443627) internal successors, (28447), 21820 states have internal predecessors, (28447), 576 states have call successors, (576), 360 states have call predecessors, (576), 360 states have return successors, (864), 576 states have call predecessors, (864), 576 states have call successors, (864) [2021-11-07 02:27:14,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22685 states to 22685 states and 29887 transitions. [2021-11-07 02:27:14,786 INFO L78 Accepts]: Start accepts. Automaton has 22685 states and 29887 transitions. Word has length 139 [2021-11-07 02:27:14,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:27:14,787 INFO L470 AbstractCegarLoop]: Abstraction has 22685 states and 29887 transitions. [2021-11-07 02:27:14,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 42.333333333333336) internal successors, (254), 6 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:27:14,787 INFO L276 IsEmpty]: Start isEmpty. Operand 22685 states and 29887 transitions. [2021-11-07 02:27:14,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-07 02:27:14,810 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:27:14,810 INFO L513 BasicCegarLoop]: trace histogram [6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:27:14,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-11-07 02:27:15,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-07 02:27:15,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (44)] Ended with exit code 0 [2021-11-07 02:27:15,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:27:15,425 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:27:15,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:27:15,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1719759770, now seen corresponding path program 1 times [2021-11-07 02:27:15,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:27:15,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1028866572] [2021-11-07 02:27:15,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:27:15,428 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:27:15,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:27:15,429 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:27:15,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-07 02:27:19,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:27:20,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 1504 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:27:20,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:27:20,411 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 02:27:20,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:27:20,700 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 02:27:20,700 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:27:20,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1028866572] [2021-11-07 02:27:20,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1028866572] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:27:20,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:27:20,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:27:20,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097534974] [2021-11-07 02:27:20,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:27:20,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:27:20,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:27:20,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:27:20,702 INFO L87 Difference]: Start difference. First operand 22685 states and 29887 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:27:39,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:27:39,186 INFO L93 Difference]: Finished difference Result 72483 states and 95811 transitions. [2021-11-07 02:27:39,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:27:39,187 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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 139 [2021-11-07 02:27:39,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:27:39,344 INFO L225 Difference]: With dead ends: 72483 [2021-11-07 02:27:39,344 INFO L226 Difference]: Without dead ends: 49816 [2021-11-07 02:27:39,377 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:27:39,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49816 states. [2021-11-07 02:27:49,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49816 to 22673. [2021-11-07 02:27:49,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22673 states, 21736 states have (on average 1.3073702613176297) internal successors, (28417), 21808 states have internal predecessors, (28417), 576 states have call successors, (576), 360 states have call predecessors, (576), 360 states have return successors, (864), 576 states have call predecessors, (864), 576 states have call successors, (864) [2021-11-07 02:27:49,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22673 states to 22673 states and 29857 transitions. [2021-11-07 02:27:49,132 INFO L78 Accepts]: Start accepts. Automaton has 22673 states and 29857 transitions. Word has length 139 [2021-11-07 02:27:49,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:27:49,133 INFO L470 AbstractCegarLoop]: Abstraction has 22673 states and 29857 transitions. [2021-11-07 02:27:49,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:27:49,133 INFO L276 IsEmpty]: Start isEmpty. Operand 22673 states and 29857 transitions. [2021-11-07 02:27:49,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-07 02:27:49,151 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:27:49,152 INFO L513 BasicCegarLoop]: trace histogram [6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:27:49,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (46)] Ended with exit code 0 [2021-11-07 02:27:49,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:27:49,373 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:27:49,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:27:49,373 INFO L85 PathProgramCache]: Analyzing trace with hash 328044648, now seen corresponding path program 1 times [2021-11-07 02:27:49,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:27:49,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [919760539] [2021-11-07 02:27:49,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:27:49,376 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:27:49,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:27:49,376 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:27:49,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cd1f4a0-0902-42b7-a5da-205836494fd4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-07 02:27:54,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:27:54,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 1541 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:27:54,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:27:55,071 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 02:27:55,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:27:56,040 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 02:27:56,040 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:27:56,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [919760539] [2021-11-07 02:27:56,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [919760539] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:27:56,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:27:56,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:27:56,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886653826] [2021-11-07 02:27:56,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:27:56,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:27:56,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:27:56,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:27:56,042 INFO L87 Difference]: Start difference. First operand 22673 states and 29857 transitions. Second operand has 4 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 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)