./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- 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_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/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_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/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 32bit --witnessprinter.graph.data.programhash 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:12:22,385 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:12:22,387 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:12:22,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:12:22,438 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:12:22,442 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:12:22,443 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:12:22,446 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:12:22,448 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:12:22,449 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:12:22,450 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:12:22,452 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:12:22,452 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:12:22,454 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:12:22,455 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:12:22,457 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:12:22,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:12:22,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:12:22,462 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:12:22,464 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:12:22,466 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:12:22,468 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:12:22,469 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:12:22,470 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:12:22,474 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:12:22,475 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:12:22,475 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:12:22,477 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:12:22,477 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:12:22,479 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:12:22,479 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:12:22,480 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:12:22,481 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:12:22,482 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:12:22,484 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:12:22,484 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:12:22,485 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:12:22,485 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:12:22,485 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:12:22,487 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:12:22,487 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:12:22,488 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:12:22,517 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:12:22,519 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:12:22,520 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:12:22,521 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:12:22,522 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:12:22,522 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:12:22,522 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:12:22,523 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:12:22,529 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:12:22,530 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:12:22,530 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:12:22,531 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:12:22,531 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:12:22,532 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:12:22,532 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:12:22,533 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:12:22,534 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:12:22,534 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:12:22,534 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:12:22,535 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:12:22,535 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:12:22,535 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:12:22,536 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:12:22,536 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:12:22,536 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:12:22,537 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:12:22,537 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:12:22,537 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:12:22,538 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:12:22,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:12:22,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:12:22,540 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:12:22,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:12:22,541 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:12:22,541 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:12:22,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:12:22,542 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:12:22,542 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:12:22,542 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:12:22,543 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_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 [2021-11-07 02:12:22,824 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:12:22,846 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:12:22,848 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:12:22,849 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:12:22,850 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:12:22,851 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2021-11-07 02:12:22,953 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/data/5880a80dd/918e30daebcd4336aabbd515bdd20263/FLAG6b7dcf1cf [2021-11-07 02:12:23,405 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:12:23,405 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2021-11-07 02:12:23,426 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/data/5880a80dd/918e30daebcd4336aabbd515bdd20263/FLAG6b7dcf1cf [2021-11-07 02:12:23,755 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/data/5880a80dd/918e30daebcd4336aabbd515bdd20263 [2021-11-07 02:12:23,758 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:12:23,759 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:12:23,761 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:12:23,761 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:12:23,773 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:12:23,774 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:12:23" (1/1) ... [2021-11-07 02:12:23,775 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@749f485e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:23, skipping insertion in model container [2021-11-07 02:12:23,775 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:12:23" (1/1) ... [2021-11-07 02:12:23,783 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:12:23,802 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:12:24,045 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_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2021-11-07 02:12:24,069 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:12:24,091 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 02:12:24,092 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@55b179cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:24, skipping insertion in model container [2021-11-07 02:12:24,093 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:12:24,093 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:12:24,096 INFO L168 Benchmark]: Toolchain (without parser) took 334.95 ms. Allocated memory is still 138.4 MB. Free memory was 101.7 MB in the beginning and 111.4 MB in the end (delta: -9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 02:12:24,098 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 81.8 MB. Free memory is still 40.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:12:24,101 INFO L168 Benchmark]: CACSL2BoogieTranslator took 332.06 ms. Allocated memory is still 138.4 MB. Free memory was 101.4 MB in the beginning and 111.4 MB in the end (delta: -10.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 02:12:24,103 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 81.8 MB. Free memory is still 40.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 332.06 ms. Allocated memory is still 138.4 MB. Free memory was 101.4 MB in the beginning and 111.4 MB in the end (delta: -10.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 113]: 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_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/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_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/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 32bit --witnessprinter.graph.data.programhash 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:12:26,434 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:12:26,438 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:12:26,495 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:12:26,496 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:12:26,502 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:12:26,504 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:12:26,508 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:12:26,512 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:12:26,520 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:12:26,521 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:12:26,523 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:12:26,523 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:12:26,526 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:12:26,529 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:12:26,534 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:12:26,536 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:12:26,537 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:12:26,539 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:12:26,549 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:12:26,551 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:12:26,553 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:12:26,556 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:12:26,558 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:12:26,562 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:12:26,563 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:12:26,563 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:12:26,565 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:12:26,566 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:12:26,567 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:12:26,568 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:12:26,569 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:12:26,571 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:12:26,572 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:12:26,574 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:12:26,575 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:12:26,576 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:12:26,576 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:12:26,576 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:12:26,579 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:12:26,579 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:12:26,580 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:12:26,626 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:12:26,626 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:12:26,627 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:12:26,628 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:12:26,628 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:12:26,628 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:12:26,628 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:12:26,629 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:12:26,629 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:12:26,630 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:12:26,632 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:12:26,632 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:12:26,632 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:12:26,632 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:12:26,633 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:12:26,633 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:12:26,633 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:12:26,633 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:12:26,633 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:12:26,634 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:12:26,634 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:12:26,634 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:12:26,634 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:12:26,635 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:12:26,635 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:12:26,635 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:12:26,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:12:26,636 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:12:26,636 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:12:26,636 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:12:26,636 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:12:26,637 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:12:26,637 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:12:26,637 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:12:26,638 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:12:26,638 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_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 [2021-11-07 02:12:27,038 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:12:27,076 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:12:27,079 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:12:27,080 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:12:27,081 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:12:27,082 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2021-11-07 02:12:27,161 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/data/5cda40a69/423b6ca583564bc599ce3fe5e93daff6/FLAGa2fcb7708 [2021-11-07 02:12:27,731 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:12:27,731 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2021-11-07 02:12:27,741 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/data/5cda40a69/423b6ca583564bc599ce3fe5e93daff6/FLAGa2fcb7708 [2021-11-07 02:12:28,077 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/data/5cda40a69/423b6ca583564bc599ce3fe5e93daff6 [2021-11-07 02:12:28,079 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:12:28,081 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:12:28,083 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:12:28,083 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:12:28,087 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:12:28,087 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:12:28" (1/1) ... [2021-11-07 02:12:28,089 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e41316d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:28, skipping insertion in model container [2021-11-07 02:12:28,089 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:12:28" (1/1) ... [2021-11-07 02:12:28,096 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:12:28,115 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:12:28,387 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_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2021-11-07 02:12:28,412 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:12:28,422 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:12:28,428 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:12:28,441 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_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2021-11-07 02:12:28,447 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:12:28,452 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:12:28,479 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_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2021-11-07 02:12:28,484 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:12:28,511 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:12:28,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:28 WrapperNode [2021-11-07 02:12:28,512 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:12:28,513 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:12:28,513 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:12:28,513 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:12:28,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:28" (1/1) ... [2021-11-07 02:12:28,542 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:28" (1/1) ... [2021-11-07 02:12:28,584 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:12:28,585 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:12:28,585 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:12:28,586 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:12:28,595 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:28" (1/1) ... [2021-11-07 02:12:28,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:28" (1/1) ... [2021-11-07 02:12:28,616 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:28" (1/1) ... [2021-11-07 02:12:28,616 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:28" (1/1) ... [2021-11-07 02:12:28,626 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:28" (1/1) ... [2021-11-07 02:12:28,647 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:28" (1/1) ... [2021-11-07 02:12:28,649 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:28" (1/1) ... [2021-11-07 02:12:28,653 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:12:28,654 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:12:28,654 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:12:28,654 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:12:28,655 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:28" (1/1) ... [2021-11-07 02:12:28,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:12:28,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:12:28,707 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:12:28,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:12:28,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:12:28,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:12:28,754 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 02:12:28,756 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-07 02:12:28,756 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-07 02:12:28,756 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-07 02:12:28,756 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-07 02:12:28,756 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-11-07 02:12:28,757 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-11-07 02:12:28,757 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-07 02:12:28,757 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-07 02:12:28,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 02:12:28,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:12:28,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:12:28,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 02:12:28,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 02:12:28,759 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-07 02:12:29,986 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:12:29,987 INFO L299 CfgBuilder]: Removed 36 assume(true) statements. [2021-11-07 02:12:29,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:12:29 BoogieIcfgContainer [2021-11-07 02:12:29,989 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:12:29,991 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:12:29,991 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:12:29,994 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:12:29,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:12:28" (1/3) ... [2021-11-07 02:12:29,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d1d4107 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:12:29, skipping insertion in model container [2021-11-07 02:12:29,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:28" (2/3) ... [2021-11-07 02:12:29,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d1d4107 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:12:29, skipping insertion in model container [2021-11-07 02:12:29,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:12:29" (3/3) ... [2021-11-07 02:12:29,997 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt.wvr.c [2021-11-07 02:12:30,002 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-07 02:12:30,003 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:12:30,003 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 02:12:30,003 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-07 02:12:30,042 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,042 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,042 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,043 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,043 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,044 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,044 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,044 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,044 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,044 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,045 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,045 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,045 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,045 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,045 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,046 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ret5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,046 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,047 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,047 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,048 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,048 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,048 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,049 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,049 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,049 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,050 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,050 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ret5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,050 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,050 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,050 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,050 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,051 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,051 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,051 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,052 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,052 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,052 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,052 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,052 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,052 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,053 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,053 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,054 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,054 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,054 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,054 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,055 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,055 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,055 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,055 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,056 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,056 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,056 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,057 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,057 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,057 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,058 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,058 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,058 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,058 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,059 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~tmp~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,059 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ret8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,059 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,059 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,059 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,060 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,060 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,060 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,061 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,061 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,061 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,061 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~tmp~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,062 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ret8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,062 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,062 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,062 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,063 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~tmp~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,064 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~tmp~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,067 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,067 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,067 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,067 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,069 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,069 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,069 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,070 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,070 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,077 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,078 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,078 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,079 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,079 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,079 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,079 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,080 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,084 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,085 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,085 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,086 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,086 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,086 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,086 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,086 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,086 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~tmp~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,086 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,086 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,087 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,087 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,087 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ret11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,087 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,087 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,087 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,088 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,088 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,088 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~tmp~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,088 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,088 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,088 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,088 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,089 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ret11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,089 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~tmp~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,089 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~tmp~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,089 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,089 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,089 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,090 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,090 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,090 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,090 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,090 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,090 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,091 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,094 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,094 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,094 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,094 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,095 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~tmp~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,095 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,095 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,095 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,095 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,095 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,095 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ret8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,096 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,096 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,096 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,099 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,099 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,099 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,100 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,100 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,101 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,102 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,102 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,102 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_~tmp~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,102 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,102 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,102 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,103 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,103 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~ret11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,105 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,105 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,105 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,106 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,106 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,106 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~ret5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,106 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,106 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,106 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,107 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,107 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,107 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,107 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,107 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 02:12:30,113 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-11-07 02:12:30,173 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:12:30,179 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 02:12:30,179 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-07 02:12:30,204 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-11-07 02:12:30,215 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 137 places, 139 transitions, 302 flow [2021-11-07 02:12:30,217 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 137 places, 139 transitions, 302 flow [2021-11-07 02:12:30,219 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 137 places, 139 transitions, 302 flow [2021-11-07 02:12:30,293 INFO L129 PetriNetUnfolder]: 12/136 cut-off events. [2021-11-07 02:12:30,293 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-11-07 02:12:30,300 INFO L84 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 136 events. 12/136 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 95 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2021-11-07 02:12:30,306 INFO L116 LiptonReduction]: Number of co-enabled transitions 1518 [2021-11-07 02:12:45,699 INFO L131 LiptonReduction]: Checked pairs total: 2293 [2021-11-07 02:12:45,700 INFO L133 LiptonReduction]: Total number of compositions: 128 [2021-11-07 02:12:45,718 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 30 transitions, 84 flow [2021-11-07 02:12:45,744 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 171 states, 170 states have (on average 3.164705882352941) internal successors, (538), 170 states have internal predecessors, (538), 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 02:12:45,758 INFO L276 IsEmpty]: Start isEmpty. Operand has 171 states, 170 states have (on average 3.164705882352941) internal successors, (538), 170 states have internal predecessors, (538), 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 02:12:45,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 02:12:45,775 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:45,776 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] [2021-11-07 02:12:45,777 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 02:12:45,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:45,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1226445814, now seen corresponding path program 1 times [2021-11-07 02:12:45,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:12:45,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [906783233] [2021-11-07 02:12:45,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:45,804 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:12:45,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:12:45,808 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:12:45,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:12:45,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:45,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:12:45,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:46,302 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 02:12:46,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:46,446 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 02:12:46,446 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:12:46,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [906783233] [2021-11-07 02:12:46,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [906783233] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:12:46,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:12:46,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-11-07 02:12:46,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248239372] [2021-11-07 02:12:46,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:12:46,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:12:46,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:12:46,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:12:46,472 INFO L87 Difference]: Start difference. First operand has 171 states, 170 states have (on average 3.164705882352941) internal successors, (538), 170 states have internal predecessors, (538), 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) Second operand has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:46,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:46,647 INFO L93 Difference]: Finished difference Result 332 states and 1054 transitions. [2021-11-07 02:12:46,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:12:46,649 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-07 02:12:46,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:46,676 INFO L225 Difference]: With dead ends: 332 [2021-11-07 02:12:46,676 INFO L226 Difference]: Without dead ends: 325 [2021-11-07 02:12:46,678 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 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 02:12:46,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-11-07 02:12:46,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 261. [2021-11-07 02:12:46,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 3.173076923076923) internal successors, (825), 260 states have internal predecessors, (825), 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 02:12:46,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 825 transitions. [2021-11-07 02:12:46,748 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 825 transitions. Word has length 20 [2021-11-07 02:12:46,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:46,749 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 825 transitions. [2021-11-07 02:12:46,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:46,749 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 825 transitions. [2021-11-07 02:12:46,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-07 02:12:46,758 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:46,758 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] [2021-11-07 02:12:46,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 02:12:46,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:12:46,971 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 02:12:46,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:46,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1607347671, now seen corresponding path program 1 times [2021-11-07 02:12:46,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:12:46,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2076419818] [2021-11-07 02:12:46,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:46,973 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:12:46,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:12:46,975 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:12:47,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:12:47,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:47,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 02:12:47,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:47,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:47,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:47,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:47,649 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:12:47,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2076419818] [2021-11-07 02:12:47,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2076419818] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 02:12:47,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 02:12:47,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-11-07 02:12:47,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245695837] [2021-11-07 02:12:47,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:12:47,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:12:47,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:12:47,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:12:47,653 INFO L87 Difference]: Start difference. First operand 261 states and 825 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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 02:12:47,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:47,878 INFO L93 Difference]: Finished difference Result 507 states and 1547 transitions. [2021-11-07 02:12:47,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:12:47,880 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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 21 [2021-11-07 02:12:47,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:47,888 INFO L225 Difference]: With dead ends: 507 [2021-11-07 02:12:47,891 INFO L226 Difference]: Without dead ends: 503 [2021-11-07 02:12:47,892 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:12:47,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-11-07 02:12:47,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 383. [2021-11-07 02:12:47,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 3.2198952879581153) internal successors, (1230), 382 states have internal predecessors, (1230), 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 02:12:47,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1230 transitions. [2021-11-07 02:12:47,960 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1230 transitions. Word has length 21 [2021-11-07 02:12:47,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:47,961 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 1230 transitions. [2021-11-07 02:12:47,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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 02:12:47,961 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1230 transitions. [2021-11-07 02:12:47,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 02:12:47,970 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:47,971 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] [2021-11-07 02:12:47,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:48,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:12:48,183 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 02:12:48,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:48,184 INFO L85 PathProgramCache]: Analyzing trace with hash -686830835, now seen corresponding path program 1 times [2021-11-07 02:12:48,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:12:48,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [504499119] [2021-11-07 02:12:48,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:48,185 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:12:48,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:12:48,189 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:12:48,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:12:48,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:48,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 02:12:48,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:48,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:12:48,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:49,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:12:49,335 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:12:49,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [504499119] [2021-11-07 02:12:49,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [504499119] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:12:49,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [927214312] [2021-11-07 02:12:49,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:49,337 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:12:49,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:12:49,343 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:12:49,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-07 02:12:49,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:49,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:12:49,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:50,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:12:50,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:50,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:12:50,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [927214312] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:12:50,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172005036] [2021-11-07 02:12:50,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:50,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:12:50,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:12:50,343 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:12:50,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 02:12:50,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:50,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 02:12:50,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:51,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:51,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:51,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:12:51,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172005036] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 02:12:51,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-11-07 02:12:51,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 8, 7, 7, 9] total 33 [2021-11-07 02:12:51,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062543167] [2021-11-07 02:12:51,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:12:51,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:12:51,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:12:51,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=813, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 02:12:51,514 INFO L87 Difference]: Start difference. First operand 383 states and 1230 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 02:12:52,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:52,419 INFO L93 Difference]: Finished difference Result 511 states and 1653 transitions. [2021-11-07 02:12:52,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:12:52,420 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 22 [2021-11-07 02:12:52,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:52,435 INFO L225 Difference]: With dead ends: 511 [2021-11-07 02:12:52,435 INFO L226 Difference]: Without dead ends: 511 [2021-11-07 02:12:52,436 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=310, Invalid=1172, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 02:12:52,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-11-07 02:12:52,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 405. [2021-11-07 02:12:52,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 3.262376237623762) internal successors, (1318), 404 states have internal predecessors, (1318), 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 02:12:52,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1318 transitions. [2021-11-07 02:12:52,461 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1318 transitions. Word has length 22 [2021-11-07 02:12:52,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:52,462 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 1318 transitions. [2021-11-07 02:12:52,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 02:12:52,462 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1318 transitions. [2021-11-07 02:12:52,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 02:12:52,464 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:52,464 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] [2021-11-07 02:12:52,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:52,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:52,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:53,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:12:53,068 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 02:12:53,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:53,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1186528439, now seen corresponding path program 2 times [2021-11-07 02:12:53,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:12:53,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1938414478] [2021-11-07 02:12:53,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:12:53,069 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:12:53,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:12:53,070 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:12:53,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:12:53,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:12:53,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:12:53,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 02:12:53,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:53,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:12:53,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:54,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:54,281 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:12:54,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1938414478] [2021-11-07 02:12:54,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1938414478] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:12:54,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [912240900] [2021-11-07 02:12:54,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:12:54,282 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:12:54,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:12:54,286 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:12:54,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-07 02:12:54,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:12:54,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:12:54,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 02:12:54,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:55,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:12:55,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:55,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:12:55,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [912240900] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 02:12:55,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-11-07 02:12:55,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 10, 6] total 25 [2021-11-07 02:12:55,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210259083] [2021-11-07 02:12:55,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:12:55,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:12:55,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:12:55,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2021-11-07 02:12:55,232 INFO L87 Difference]: Start difference. First operand 405 states and 1318 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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 02:12:55,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:55,915 INFO L93 Difference]: Finished difference Result 659 states and 2034 transitions. [2021-11-07 02:12:55,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:12:55,917 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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 22 [2021-11-07 02:12:55,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:55,925 INFO L225 Difference]: With dead ends: 659 [2021-11-07 02:12:55,925 INFO L226 Difference]: Without dead ends: 659 [2021-11-07 02:12:55,926 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=239, Invalid=753, Unknown=0, NotChecked=0, Total=992 [2021-11-07 02:12:55,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-11-07 02:12:55,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 397. [2021-11-07 02:12:55,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 3.242424242424242) internal successors, (1284), 396 states have internal predecessors, (1284), 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 02:12:55,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1284 transitions. [2021-11-07 02:12:55,948 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1284 transitions. Word has length 22 [2021-11-07 02:12:55,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:55,949 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 1284 transitions. [2021-11-07 02:12:55,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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 02:12:55,949 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1284 transitions. [2021-11-07 02:12:55,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 02:12:55,951 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:55,951 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] [2021-11-07 02:12:55,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:56,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:56,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:12:56,355 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 02:12:56,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:56,355 INFO L85 PathProgramCache]: Analyzing trace with hash -231322967, now seen corresponding path program 3 times [2021-11-07 02:12:56,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:12:56,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1652670702] [2021-11-07 02:12:56,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:12:56,356 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:12:56,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:12:56,357 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:12:56,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:12:56,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 02:12:56,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:12:56,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 02:12:56,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:57,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:57,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:57,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:57,691 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:12:57,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1652670702] [2021-11-07 02:12:57,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1652670702] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:12:57,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [982117039] [2021-11-07 02:12:57,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:12:57,691 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:12:57,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:12:57,692 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:12:57,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-07 02:12:58,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 02:12:58,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:12:58,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 02:12:58,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:58,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:12:58,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:58,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:12:58,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [982117039] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 02:12:58,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-11-07 02:12:58,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 10, 6] total 25 [2021-11-07 02:12:58,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748435799] [2021-11-07 02:12:58,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:12:58,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:12:58,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:12:58,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=464, Unknown=0, NotChecked=0, Total=650 [2021-11-07 02:12:58,743 INFO L87 Difference]: Start difference. First operand 397 states and 1284 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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 02:12:59,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:59,509 INFO L93 Difference]: Finished difference Result 749 states and 2316 transitions. [2021-11-07 02:12:59,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 02:12:59,510 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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 22 [2021-11-07 02:12:59,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:59,519 INFO L225 Difference]: With dead ends: 749 [2021-11-07 02:12:59,519 INFO L226 Difference]: Without dead ends: 749 [2021-11-07 02:12:59,520 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 02:12:59,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-11-07 02:12:59,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 407. [2021-11-07 02:12:59,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.3004926108374386) internal successors, (1340), 406 states have internal predecessors, (1340), 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 02:12:59,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1340 transitions. [2021-11-07 02:12:59,546 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1340 transitions. Word has length 22 [2021-11-07 02:12:59,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:59,546 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 1340 transitions. [2021-11-07 02:12:59,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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 02:12:59,546 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1340 transitions. [2021-11-07 02:12:59,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 02:12:59,548 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:59,549 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] [2021-11-07 02:12:59,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:59,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:59,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:12:59,962 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 02:12:59,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:59,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1105063647, now seen corresponding path program 4 times [2021-11-07 02:12:59,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:12:59,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [746022130] [2021-11-07 02:12:59,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 02:12:59,963 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:12:59,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:12:59,964 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:12:59,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:13:00,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 02:13:00,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:13:00,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 02:13:00,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:00,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:13:00,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:01,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:13:01,112 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:01,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [746022130] [2021-11-07 02:13:01,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [746022130] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:13:01,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [23644520] [2021-11-07 02:13:01,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 02:13:01,113 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:13:01,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:13:01,116 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:13:01,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-07 02:13:01,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 02:13:01,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:13:01,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:13:01,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:01,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:13:01,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:02,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:13:02,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [23644520] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:13:02,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036821072] [2021-11-07 02:13:02,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 02:13:02,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:13:02,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:13:02,121 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:13:02,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 02:13:02,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 02:13:02,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:13:02,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 02:13:02,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:02,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:02,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:03,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:13:03,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036821072] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 02:13:03,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-11-07 02:13:03,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 8, 7, 7, 9] total 31 [2021-11-07 02:13:03,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071776913] [2021-11-07 02:13:03,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:13:03,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:03,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:13:03,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2021-11-07 02:13:03,232 INFO L87 Difference]: Start difference. First operand 407 states and 1340 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 02:13:04,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:04,058 INFO L93 Difference]: Finished difference Result 707 states and 2308 transitions. [2021-11-07 02:13:04,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 02:13:04,060 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 22 [2021-11-07 02:13:04,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:04,068 INFO L225 Difference]: With dead ends: 707 [2021-11-07 02:13:04,069 INFO L226 Difference]: Without dead ends: 707 [2021-11-07 02:13:04,069 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=315, Invalid=1017, Unknown=0, NotChecked=0, Total=1332 [2021-11-07 02:13:04,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-11-07 02:13:04,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 423. [2021-11-07 02:13:04,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 3.3720379146919433) internal successors, (1423), 422 states have internal predecessors, (1423), 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 02:13:04,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1423 transitions. [2021-11-07 02:13:04,098 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1423 transitions. Word has length 22 [2021-11-07 02:13:04,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:04,098 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 1423 transitions. [2021-11-07 02:13:04,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 02:13:04,099 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1423 transitions. [2021-11-07 02:13:04,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 02:13:04,101 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:04,102 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] [2021-11-07 02:13:04,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:04,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:04,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-07 02:13:04,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:13:04,706 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 02:13:04,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:04,706 INFO L85 PathProgramCache]: Analyzing trace with hash 529038497, now seen corresponding path program 5 times [2021-11-07 02:13:04,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:04,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [519417464] [2021-11-07 02:13:04,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 02:13:04,707 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:04,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:04,708 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:04,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:13:05,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:13:05,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:13:05,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 02:13:05,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:05,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:13:05,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:05,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:13:05,949 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:05,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [519417464] [2021-11-07 02:13:05,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [519417464] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:13:05,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2012217722] [2021-11-07 02:13:05,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 02:13:05,950 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:13:05,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:13:05,957 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:13:05,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-07 02:13:06,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:13:06,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:13:06,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:13:06,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:06,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:13:06,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:07,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:13:07,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2012217722] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:13:07,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284714253] [2021-11-07 02:13:07,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 02:13:07,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:13:07,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:13:07,213 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:13:07,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 02:13:07,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:13:07,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:13:07,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 02:13:07,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:08,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:13:08,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:08,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:13:08,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284714253] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 02:13:08,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-11-07 02:13:08,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8, 7, 7, 8] total 37 [2021-11-07 02:13:08,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765381347] [2021-11-07 02:13:08,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:13:08,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:08,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:13:08,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=1023, Unknown=0, NotChecked=0, Total=1332 [2021-11-07 02:13:08,601 INFO L87 Difference]: Start difference. First operand 423 states and 1423 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 02:13:09,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:09,231 INFO L93 Difference]: Finished difference Result 545 states and 1891 transitions. [2021-11-07 02:13:09,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:13:09,232 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 22 [2021-11-07 02:13:09,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:09,238 INFO L225 Difference]: With dead ends: 545 [2021-11-07 02:13:09,238 INFO L226 Difference]: Without dead ends: 543 [2021-11-07 02:13:09,239 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=372, Invalid=1268, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 02:13:09,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-11-07 02:13:09,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 431. [2021-11-07 02:13:09,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 3.4069767441860463) internal successors, (1465), 430 states have internal predecessors, (1465), 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 02:13:09,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1465 transitions. [2021-11-07 02:13:09,264 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1465 transitions. Word has length 22 [2021-11-07 02:13:09,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:09,264 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 1465 transitions. [2021-11-07 02:13:09,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 02:13:09,265 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1465 transitions. [2021-11-07 02:13:09,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 02:13:09,267 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:09,267 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] [2021-11-07 02:13:09,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:09,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:09,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-07 02:13:09,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:13:09,886 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 02:13:09,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:09,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1981740149, now seen corresponding path program 6 times [2021-11-07 02:13:09,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:09,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [807558784] [2021-11-07 02:13:09,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 02:13:09,887 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:09,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:09,890 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:09,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:13:10,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-07 02:13:10,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:13:10,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 02:13:10,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:11,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:11,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:11,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:11,622 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:11,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [807558784] [2021-11-07 02:13:11,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [807558784] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:13:11,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1636567274] [2021-11-07 02:13:11,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 02:13:11,622 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:13:11,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:13:11,623 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:13:11,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-07 02:13:12,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-07 02:13:12,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:13:12,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 02:13:12,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:13,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:13,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:13,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:13,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1636567274] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:13:13,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258200195] [2021-11-07 02:13:13,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 02:13:13,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:13:13,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:13:13,403 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:13:13,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 02:13:14,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-07 02:13:14,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:13:14,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 02:13:14,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:14,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:14,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:15,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:13:15,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258200195] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 02:13:15,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-11-07 02:13:15,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 10, 7, 7, 9] total 39 [2021-11-07 02:13:15,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273062593] [2021-11-07 02:13:15,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:13:15,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:15,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:13:15,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 02:13:15,355 INFO L87 Difference]: Start difference. First operand 431 states and 1465 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 02:13:16,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:16,035 INFO L93 Difference]: Finished difference Result 709 states and 2294 transitions. [2021-11-07 02:13:16,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:13:16,037 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 22 [2021-11-07 02:13:16,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:16,043 INFO L225 Difference]: With dead ends: 709 [2021-11-07 02:13:16,044 INFO L226 Difference]: Without dead ends: 709 [2021-11-07 02:13:16,045 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=431, Invalid=1461, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 02:13:16,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2021-11-07 02:13:16,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 429. [2021-11-07 02:13:16,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.4065420560747666) internal successors, (1458), 428 states have internal predecessors, (1458), 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 02:13:16,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1458 transitions. [2021-11-07 02:13:16,068 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1458 transitions. Word has length 22 [2021-11-07 02:13:16,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:16,069 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1458 transitions. [2021-11-07 02:13:16,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 02:13:16,069 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1458 transitions. [2021-11-07 02:13:16,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 02:13:16,071 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:16,071 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] [2021-11-07 02:13:16,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:16,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:16,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:16,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:13:16,686 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 02:13:16,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:16,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1460921377, now seen corresponding path program 7 times [2021-11-07 02:13:16,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:16,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1668127852] [2021-11-07 02:13:16,687 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 02:13:16,687 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:16,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:16,688 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:16,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 02:13:17,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:17,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 02:13:17,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:17,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:13:17,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:18,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:13:18,461 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:18,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1668127852] [2021-11-07 02:13:18,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1668127852] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:13:18,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [712586835] [2021-11-07 02:13:18,462 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 02:13:18,462 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:13:18,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:13:18,464 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:13:18,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 02:13:19,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:19,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:13:19,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:19,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:13:19,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:19,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:13:19,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [712586835] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:13:19,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708608591] [2021-11-07 02:13:19,896 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 02:13:19,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:13:19,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:13:19,897 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:13:19,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-07 02:13:20,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:20,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 02:13:20,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:21,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:21,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:21,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:13:21,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708608591] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 02:13:21,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-11-07 02:13:21,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 8, 7, 7, 9] total 33 [2021-11-07 02:13:21,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120671100] [2021-11-07 02:13:21,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:13:21,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:21,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:13:21,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=805, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 02:13:21,572 INFO L87 Difference]: Start difference. First operand 429 states and 1458 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 02:13:22,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:22,349 INFO L93 Difference]: Finished difference Result 741 states and 2388 transitions. [2021-11-07 02:13:22,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:13:22,351 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 22 [2021-11-07 02:13:22,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:22,359 INFO L225 Difference]: With dead ends: 741 [2021-11-07 02:13:22,359 INFO L226 Difference]: Without dead ends: 741 [2021-11-07 02:13:22,360 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=333, Invalid=1073, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 02:13:22,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-11-07 02:13:22,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 423. [2021-11-07 02:13:22,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 3.374407582938389) internal successors, (1424), 422 states have internal predecessors, (1424), 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 02:13:22,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1424 transitions. [2021-11-07 02:13:22,388 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1424 transitions. Word has length 22 [2021-11-07 02:13:22,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:22,390 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 1424 transitions. [2021-11-07 02:13:22,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 02:13:22,390 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1424 transitions. [2021-11-07 02:13:22,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 02:13:22,395 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:22,395 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] [2021-11-07 02:13:22,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:22,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:22,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-11-07 02:13:22,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:13:23,000 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 02:13:23,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:23,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1826269301, now seen corresponding path program 8 times [2021-11-07 02:13:23,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:23,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [819986104] [2021-11-07 02:13:23,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:13:23,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:23,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:23,002 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:23,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 02:13:23,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:13:23,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:13:23,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 02:13:23,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:24,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:24,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:24,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:24,621 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:24,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [819986104] [2021-11-07 02:13:24,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [819986104] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:13:24,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [445796967] [2021-11-07 02:13:24,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:13:24,622 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:13:24,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:13:24,623 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:13:24,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-07 02:13:25,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:13:25,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:13:25,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 02:13:25,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:26,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:26,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:26,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:26,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [445796967] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:13:26,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904946842] [2021-11-07 02:13:26,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:13:26,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:13:26,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:13:26,325 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:13:26,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-07 02:13:27,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:13:27,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:13:27,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 02:13:27,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:27,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:27,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:27,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:13:27,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904946842] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:13:27,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:13:27,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 7, 7, 8, 7] total 28 [2021-11-07 02:13:27,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291238003] [2021-11-07 02:13:27,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-07 02:13:27,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:27,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-07 02:13:27,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2021-11-07 02:13:27,801 INFO L87 Difference]: Start difference. First operand 423 states and 1424 transitions. Second operand has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 28 states have internal predecessors, (71), 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 02:13:33,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:33,900 INFO L93 Difference]: Finished difference Result 1699 states and 5329 transitions. [2021-11-07 02:13:33,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-07 02:13:33,902 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 28 states have internal predecessors, (71), 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 22 [2021-11-07 02:13:33,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:33,919 INFO L225 Difference]: With dead ends: 1699 [2021-11-07 02:13:33,919 INFO L226 Difference]: Without dead ends: 1699 [2021-11-07 02:13:33,922 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1666 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1551, Invalid=4929, Unknown=0, NotChecked=0, Total=6480 [2021-11-07 02:13:33,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2021-11-07 02:13:33,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 607. [2021-11-07 02:13:33,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 606 states have (on average 3.257425742574257) internal successors, (1974), 606 states have internal predecessors, (1974), 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 02:13:33,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1974 transitions. [2021-11-07 02:13:33,975 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1974 transitions. Word has length 22 [2021-11-07 02:13:33,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:33,975 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 1974 transitions. [2021-11-07 02:13:33,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 28 states have internal predecessors, (71), 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 02:13:33,976 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1974 transitions. [2021-11-07 02:13:33,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 02:13:33,979 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:33,979 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] [2021-11-07 02:13:34,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:34,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:34,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:34,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:13:34,595 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 02:13:34,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:34,595 INFO L85 PathProgramCache]: Analyzing trace with hash 812703437, now seen corresponding path program 9 times [2021-11-07 02:13:34,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:34,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1653086746] [2021-11-07 02:13:34,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:13:34,596 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:34,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:34,597 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:34,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 02:13:35,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 02:13:35,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:13:35,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 02:13:35,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:35,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:35,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:36,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:36,320 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:36,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1653086746] [2021-11-07 02:13:36,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1653086746] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:13:36,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1041675026] [2021-11-07 02:13:36,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:13:36,321 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:13:36,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:13:36,321 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:13:36,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-07 02:13:37,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 02:13:37,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:13:37,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 02:13:37,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:37,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:13:37,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:37,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:13:37,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1041675026] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 02:13:37,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-11-07 02:13:37,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 9, 6] total 23 [2021-11-07 02:13:37,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858840357] [2021-11-07 02:13:37,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:13:37,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:37,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:13:37,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2021-11-07 02:13:37,795 INFO L87 Difference]: Start difference. First operand 607 states and 1974 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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 02:13:38,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:38,309 INFO L93 Difference]: Finished difference Result 1085 states and 3467 transitions. [2021-11-07 02:13:38,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:13:38,310 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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 22 [2021-11-07 02:13:38,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:38,320 INFO L225 Difference]: With dead ends: 1085 [2021-11-07 02:13:38,320 INFO L226 Difference]: Without dead ends: 1085 [2021-11-07 02:13:38,321 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=258, Invalid=612, Unknown=0, NotChecked=0, Total=870 [2021-11-07 02:13:38,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2021-11-07 02:13:38,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 639. [2021-11-07 02:13:38,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.341692789968652) internal successors, (2132), 638 states have internal predecessors, (2132), 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 02:13:38,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2132 transitions. [2021-11-07 02:13:38,356 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2132 transitions. Word has length 22 [2021-11-07 02:13:38,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:38,357 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 2132 transitions. [2021-11-07 02:13:38,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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 02:13:38,357 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2132 transitions. [2021-11-07 02:13:38,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 02:13:38,363 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:38,363 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] [2021-11-07 02:13:38,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:38,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:38,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:13:38,769 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 02:13:38,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:38,770 INFO L85 PathProgramCache]: Analyzing trace with hash -61037243, now seen corresponding path program 10 times [2021-11-07 02:13:38,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:38,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [736814551] [2021-11-07 02:13:38,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 02:13:38,771 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:38,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:38,772 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:38,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 02:13:39,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 02:13:39,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:13:39,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 02:13:39,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:39,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:13:39,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:40,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:13:40,232 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:40,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [736814551] [2021-11-07 02:13:40,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [736814551] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:13:40,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [338639618] [2021-11-07 02:13:40,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 02:13:40,233 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:13:40,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:13:40,234 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:13:40,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-07 02:13:41,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 02:13:41,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:13:41,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:13:41,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:41,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:13:41,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:41,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:13:41,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [338639618] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:13:41,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26249958] [2021-11-07 02:13:41,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 02:13:41,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:13:41,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:13:41,885 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:13:41,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-07 02:13:42,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 02:13:42,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:13:42,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 02:13:42,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:43,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:43,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:43,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:13:43,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26249958] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 02:13:43,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-11-07 02:13:43,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 8, 7, 7, 8] total 27 [2021-11-07 02:13:43,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600013357] [2021-11-07 02:13:43,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:13:43,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:43,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:13:43,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=522, Unknown=0, NotChecked=0, Total=702 [2021-11-07 02:13:43,463 INFO L87 Difference]: Start difference. First operand 639 states and 2132 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 02:13:44,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:44,583 INFO L93 Difference]: Finished difference Result 991 states and 3183 transitions. [2021-11-07 02:13:44,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 02:13:44,584 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 22 [2021-11-07 02:13:44,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:44,593 INFO L225 Difference]: With dead ends: 991 [2021-11-07 02:13:44,594 INFO L226 Difference]: Without dead ends: 991 [2021-11-07 02:13:44,595 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=302, Invalid=1030, Unknown=0, NotChecked=0, Total=1332 [2021-11-07 02:13:44,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2021-11-07 02:13:44,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 647. [2021-11-07 02:13:44,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 646 states have (on average 3.3544891640866874) internal successors, (2167), 646 states have internal predecessors, (2167), 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 02:13:44,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 2167 transitions. [2021-11-07 02:13:44,627 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 2167 transitions. Word has length 22 [2021-11-07 02:13:44,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:44,627 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 2167 transitions. [2021-11-07 02:13:44,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 02:13:44,628 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 2167 transitions. [2021-11-07 02:13:44,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 02:13:44,630 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:44,631 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] [2021-11-07 02:13:44,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:44,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-11-07 02:13:45,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-07 02:13:45,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:13:45,236 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 02:13:45,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:45,237 INFO L85 PathProgramCache]: Analyzing trace with hash 823313719, now seen corresponding path program 11 times [2021-11-07 02:13:45,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:45,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [426392991] [2021-11-07 02:13:45,237 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 02:13:45,237 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:45,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:45,238 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:45,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-07 02:13:46,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:13:46,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:13:46,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 02:13:46,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:46,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:46,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:47,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:13:47,127 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:47,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [426392991] [2021-11-07 02:13:47,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [426392991] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:13:47,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [874350485] [2021-11-07 02:13:47,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 02:13:47,128 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:13:47,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:13:47,129 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:13:47,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-07 02:13:48,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:13:48,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:13:48,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:13:48,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:48,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:13:48,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:48,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:13:48,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [874350485] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:13:48,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291245163] [2021-11-07 02:13:48,930 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 02:13:48,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:13:48,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:13:48,931 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:13:48,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-07 02:13:50,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:13:50,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:13:50,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 02:13:50,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:50,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:50,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:50,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:13:50,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291245163] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 02:13:50,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-11-07 02:13:50,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 8, 7, 7, 8] total 27 [2021-11-07 02:13:50,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307971858] [2021-11-07 02:13:50,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:13:50,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:50,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:13:50,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2021-11-07 02:13:50,532 INFO L87 Difference]: Start difference. First operand 647 states and 2167 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 02:13:51,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:51,502 INFO L93 Difference]: Finished difference Result 903 states and 2918 transitions. [2021-11-07 02:13:51,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 02:13:51,503 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 22 [2021-11-07 02:13:51,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:51,510 INFO L225 Difference]: With dead ends: 903 [2021-11-07 02:13:51,511 INFO L226 Difference]: Without dead ends: 903 [2021-11-07 02:13:51,511 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=277, Invalid=913, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 02:13:51,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2021-11-07 02:13:51,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 635. [2021-11-07 02:13:51,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 3.364353312302839) internal successors, (2133), 634 states have internal predecessors, (2133), 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 02:13:51,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 2133 transitions. [2021-11-07 02:13:51,545 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 2133 transitions. Word has length 22 [2021-11-07 02:13:51,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:51,546 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 2133 transitions. [2021-11-07 02:13:51,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 02:13:51,546 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 2133 transitions. [2021-11-07 02:13:51,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 02:13:51,549 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:51,550 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] [2021-11-07 02:13:51,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-11-07 02:13:51,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:51,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-11-07 02:13:52,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:13:52,168 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 02:13:52,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:52,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1268806335, now seen corresponding path program 12 times [2021-11-07 02:13:52,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:52,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [588662851] [2021-11-07 02:13:52,170 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 02:13:52,170 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:52,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:52,171 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:52,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-07 02:13:53,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-07 02:13:53,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:13:53,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 02:13:53,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:53,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:13:53,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:54,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:54,251 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:54,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [588662851] [2021-11-07 02:13:54,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [588662851] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:13:54,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1560636062] [2021-11-07 02:13:54,252 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 02:13:54,252 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:13:54,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:13:54,254 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:13:54,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-07 02:13:55,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-07 02:13:55,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:13:55,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 02:13:55,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:56,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:13:56,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:56,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:13:56,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1560636062] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 02:13:56,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-11-07 02:13:56,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 10, 6] total 25 [2021-11-07 02:13:56,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498398041] [2021-11-07 02:13:56,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:13:56,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:56,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:13:56,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=483, Unknown=0, NotChecked=0, Total=650 [2021-11-07 02:13:56,368 INFO L87 Difference]: Start difference. First operand 635 states and 2133 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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 02:13:57,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:57,216 INFO L93 Difference]: Finished difference Result 1067 states and 3386 transitions. [2021-11-07 02:13:57,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 02:13:57,217 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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 22 [2021-11-07 02:13:57,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:57,226 INFO L225 Difference]: With dead ends: 1067 [2021-11-07 02:13:57,226 INFO L226 Difference]: Without dead ends: 1067 [2021-11-07 02:13:57,226 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=283, Invalid=839, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 02:13:57,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-11-07 02:13:57,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 623. [2021-11-07 02:13:57,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 622 states have (on average 3.32475884244373) internal successors, (2068), 622 states have internal predecessors, (2068), 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 02:13:57,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 2068 transitions. [2021-11-07 02:13:57,263 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 2068 transitions. Word has length 22 [2021-11-07 02:13:57,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:57,263 INFO L470 AbstractCegarLoop]: Abstraction has 623 states and 2068 transitions. [2021-11-07 02:13:57,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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 02:13:57,264 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 2068 transitions. [2021-11-07 02:13:57,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 02:13:57,267 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:57,267 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] [2021-11-07 02:13:57,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:57,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:57,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:13:57,674 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 02:13:57,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:57,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1811056461, now seen corresponding path program 13 times [2021-11-07 02:13:57,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:57,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1904626762] [2021-11-07 02:13:57,675 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 02:13:57,675 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:57,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:57,676 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:57,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-07 02:13:58,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:58,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 02:13:58,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:59,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:13:59,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:59,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:13:59,821 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:59,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1904626762] [2021-11-07 02:13:59,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1904626762] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 02:13:59,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 02:13:59,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2021-11-07 02:13:59,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784878145] [2021-11-07 02:13:59,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 02:13:59,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:59,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 02:13:59,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:13:59,823 INFO L87 Difference]: Start difference. First operand 623 states and 2068 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 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 02:14:00,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:00,629 INFO L93 Difference]: Finished difference Result 1061 states and 3237 transitions. [2021-11-07 02:14:00,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 02:14:00,632 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 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 22 [2021-11-07 02:14:00,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:00,639 INFO L225 Difference]: With dead ends: 1061 [2021-11-07 02:14:00,639 INFO L226 Difference]: Without dead ends: 991 [2021-11-07 02:14:00,640 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-11-07 02:14:00,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2021-11-07 02:14:00,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 753. [2021-11-07 02:14:00,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 3.2327127659574466) internal successors, (2431), 752 states have internal predecessors, (2431), 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 02:14:00,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2431 transitions. [2021-11-07 02:14:00,683 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2431 transitions. Word has length 22 [2021-11-07 02:14:00,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:00,683 INFO L470 AbstractCegarLoop]: Abstraction has 753 states and 2431 transitions. [2021-11-07 02:14:00,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 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 02:14:00,684 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2431 transitions. [2021-11-07 02:14:00,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 02:14:00,687 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:00,687 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] [2021-11-07 02:14:00,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:00,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:00,905 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 02:14:00,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:00,905 INFO L85 PathProgramCache]: Analyzing trace with hash -26867811, now seen corresponding path program 14 times [2021-11-07 02:14:00,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:00,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1827773386] [2021-11-07 02:14:00,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:14:00,906 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:00,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:00,907 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:00,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-07 02:14:02,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:14:02,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:14:02,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 02:14:02,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:02,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:02,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:03,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:03,162 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:03,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1827773386] [2021-11-07 02:14:03,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1827773386] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:14:03,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [404992292] [2021-11-07 02:14:03,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:14:03,163 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:14:03,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:14:03,164 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:14:03,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-07 02:14:04,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:14:04,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:14:04,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 02:14:04,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:05,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:05,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:05,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:05,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [404992292] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:14:05,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829637387] [2021-11-07 02:14:05,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:14:05,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:14:05,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:14:05,520 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:14:05,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-07 02:14:06,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:14:06,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:14:06,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 02:14:06,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:07,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:07,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:07,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:14:07,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829637387] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 02:14:07,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-11-07 02:14:07,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 10, 7, 7, 9] total 39 [2021-11-07 02:14:07,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161635152] [2021-11-07 02:14:07,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:14:07,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:07,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:14:07,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=1135, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 02:14:07,888 INFO L87 Difference]: Start difference. First operand 753 states and 2431 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 02:14:08,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:08,669 INFO L93 Difference]: Finished difference Result 1013 states and 3236 transitions. [2021-11-07 02:14:08,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 02:14:08,671 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 22 [2021-11-07 02:14:08,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:08,679 INFO L225 Difference]: With dead ends: 1013 [2021-11-07 02:14:08,679 INFO L226 Difference]: Without dead ends: 1013 [2021-11-07 02:14:08,680 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=429, Invalid=1551, Unknown=0, NotChecked=0, Total=1980 [2021-11-07 02:14:08,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2021-11-07 02:14:08,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 755. [2021-11-07 02:14:08,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 3.246684350132626) internal successors, (2448), 754 states have internal predecessors, (2448), 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 02:14:08,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2448 transitions. [2021-11-07 02:14:08,714 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2448 transitions. Word has length 22 [2021-11-07 02:14:08,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:08,715 INFO L470 AbstractCegarLoop]: Abstraction has 755 states and 2448 transitions. [2021-11-07 02:14:08,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 02:14:08,715 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2448 transitions. [2021-11-07 02:14:08,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 02:14:08,719 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:08,719 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] [2021-11-07 02:14:08,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:08,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-11-07 02:14:09,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:09,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:14:09,336 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 02:14:09,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:09,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1055314999, now seen corresponding path program 15 times [2021-11-07 02:14:09,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:09,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [237708440] [2021-11-07 02:14:09,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:14:09,337 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:09,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:09,338 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:09,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-07 02:14:10,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 02:14:10,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:14:10,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 02:14:10,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:11,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:11,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:11,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:11,449 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:11,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [237708440] [2021-11-07 02:14:11,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [237708440] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:14:11,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [127678354] [2021-11-07 02:14:11,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:14:11,450 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:14:11,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:14:11,451 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:14:11,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-11-07 02:14:13,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 02:14:13,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:14:13,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 02:14:13,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:13,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:13,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:14,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:14,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [127678354] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:14:14,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892166484] [2021-11-07 02:14:14,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:14:14,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:14:14,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:14:14,021 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:14:14,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-07 02:14:15,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 02:14:15,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:14:15,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 02:14:15,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:16,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:16,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:16,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:14:16,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892166484] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 02:14:16,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-11-07 02:14:16,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 10, 7, 7, 9] total 37 [2021-11-07 02:14:16,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125333141] [2021-11-07 02:14:16,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:14:16,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:16,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:14:16,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1017, Unknown=0, NotChecked=0, Total=1332 [2021-11-07 02:14:16,378 INFO L87 Difference]: Start difference. First operand 755 states and 2448 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 02:14:17,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:17,092 INFO L93 Difference]: Finished difference Result 937 states and 3041 transitions. [2021-11-07 02:14:17,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:14:17,093 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 22 [2021-11-07 02:14:17,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:17,101 INFO L225 Difference]: With dead ends: 937 [2021-11-07 02:14:17,102 INFO L226 Difference]: Without dead ends: 937 [2021-11-07 02:14:17,103 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=389, Invalid=1417, Unknown=0, NotChecked=0, Total=1806 [2021-11-07 02:14:17,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2021-11-07 02:14:17,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 755. [2021-11-07 02:14:17,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 3.246684350132626) internal successors, (2448), 754 states have internal predecessors, (2448), 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 02:14:17,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2448 transitions. [2021-11-07 02:14:17,130 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2448 transitions. Word has length 22 [2021-11-07 02:14:17,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:17,130 INFO L470 AbstractCegarLoop]: Abstraction has 755 states and 2448 transitions. [2021-11-07 02:14:17,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 02:14:17,130 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2448 transitions. [2021-11-07 02:14:17,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 02:14:17,132 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:17,132 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] [2021-11-07 02:14:17,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:17,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2021-11-07 02:14:17,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:17,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:14:17,739 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 02:14:17,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:17,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1235529161, now seen corresponding path program 16 times [2021-11-07 02:14:17,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:17,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [148584281] [2021-11-07 02:14:17,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 02:14:17,740 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:17,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:17,741 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:17,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-07 02:14:19,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 02:14:19,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:14:19,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 02:14:19,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:19,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:14:19,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:19,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:14:19,810 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:19,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [148584281] [2021-11-07 02:14:19,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [148584281] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:14:19,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [780516304] [2021-11-07 02:14:19,811 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 02:14:19,811 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:14:19,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:14:19,812 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:14:19,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2021-11-07 02:14:21,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 02:14:21,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:14:21,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:14:21,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:21,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:14:21,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:22,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:14:22,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [780516304] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:14:22,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703512103] [2021-11-07 02:14:22,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 02:14:22,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:14:22,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:14:22,065 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:14:22,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-07 02:14:23,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 02:14:23,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:14:23,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 02:14:23,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:23,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:23,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:24,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:14:24,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703512103] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 02:14:24,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-11-07 02:14:24,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 8, 7, 7, 9] total 29 [2021-11-07 02:14:24,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345691682] [2021-11-07 02:14:24,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:14:24,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:24,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:14:24,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=620, Unknown=0, NotChecked=0, Total=812 [2021-11-07 02:14:24,214 INFO L87 Difference]: Start difference. First operand 755 states and 2448 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 02:14:25,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:25,087 INFO L93 Difference]: Finished difference Result 1119 states and 3559 transitions. [2021-11-07 02:14:25,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:14:25,088 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 22 [2021-11-07 02:14:25,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:25,100 INFO L225 Difference]: With dead ends: 1119 [2021-11-07 02:14:25,100 INFO L226 Difference]: Without dead ends: 1119 [2021-11-07 02:14:25,101 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=285, Invalid=975, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 02:14:25,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-11-07 02:14:25,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 749. [2021-11-07 02:14:25,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 3.236631016042781) internal successors, (2421), 748 states have internal predecessors, (2421), 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 02:14:25,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2421 transitions. [2021-11-07 02:14:25,137 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2421 transitions. Word has length 22 [2021-11-07 02:14:25,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:25,138 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 2421 transitions. [2021-11-07 02:14:25,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 02:14:25,138 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2421 transitions. [2021-11-07 02:14:25,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 02:14:25,141 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:25,141 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] [2021-11-07 02:14:25,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:25,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:25,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:25,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:14:25,770 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 02:14:25,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:25,770 INFO L85 PathProgramCache]: Analyzing trace with hash -767736013, now seen corresponding path program 17 times [2021-11-07 02:14:25,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:25,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2031950004] [2021-11-07 02:14:25,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 02:14:25,771 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:25,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:25,772 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:25,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-07 02:14:27,047 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:14:27,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:14:27,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 02:14:27,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:27,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:14:27,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:27,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:14:27,859 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:27,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2031950004] [2021-11-07 02:14:27,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2031950004] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:14:27,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1334211859] [2021-11-07 02:14:27,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 02:14:27,860 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:14:27,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:14:27,861 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:14:27,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2021-11-07 02:14:29,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:14:29,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:14:29,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:14:29,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:29,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:14:29,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:30,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:14:30,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1334211859] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:14:30,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442957683] [2021-11-07 02:14:30,207 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 02:14:30,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:14:30,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:14:30,208 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:14:30,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-07 02:14:31,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:14:31,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:14:31,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 02:14:31,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:32,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:14:32,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:32,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:14:32,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442957683] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 02:14:32,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-11-07 02:14:32,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8, 7, 7, 8] total 36 [2021-11-07 02:14:32,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641463476] [2021-11-07 02:14:32,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:14:32,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:32,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:14:32,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=989, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 02:14:32,706 INFO L87 Difference]: Start difference. First operand 749 states and 2421 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 02:14:33,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:33,539 INFO L93 Difference]: Finished difference Result 1121 states and 3668 transitions. [2021-11-07 02:14:33,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 02:14:33,540 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 22 [2021-11-07 02:14:33,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:33,548 INFO L225 Difference]: With dead ends: 1121 [2021-11-07 02:14:33,548 INFO L226 Difference]: Without dead ends: 1117 [2021-11-07 02:14:33,550 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=360, Invalid=1362, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 02:14:33,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2021-11-07 02:14:33,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 761. [2021-11-07 02:14:33,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 760 states have (on average 3.232894736842105) internal successors, (2457), 760 states have internal predecessors, (2457), 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 02:14:33,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 2457 transitions. [2021-11-07 02:14:33,582 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 2457 transitions. Word has length 22 [2021-11-07 02:14:33,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:33,582 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 2457 transitions. [2021-11-07 02:14:33,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 02:14:33,583 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 2457 transitions. [2021-11-07 02:14:33,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 02:14:33,586 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:33,586 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] [2021-11-07 02:14:33,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:33,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:34,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:34,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:14:34,201 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 02:14:34,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:34,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1016452637, now seen corresponding path program 18 times [2021-11-07 02:14:34,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:34,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1348843415] [2021-11-07 02:14:34,202 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 02:14:34,202 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:34,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:34,203 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:34,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-11-07 02:14:35,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-07 02:14:35,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:14:35,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 02:14:35,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:36,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:36,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:36,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:36,510 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:36,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1348843415] [2021-11-07 02:14:36,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1348843415] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:14:36,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1644719695] [2021-11-07 02:14:36,511 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 02:14:36,511 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:14:36,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:14:36,512 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:14:36,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2021-11-07 02:14:38,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-07 02:14:38,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:14:38,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 02:14:38,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:38,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:38,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:39,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:39,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1644719695] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:14:39,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824669464] [2021-11-07 02:14:39,299 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 02:14:39,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:14:39,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:14:39,302 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:14:39,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-07 02:14:40,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-07 02:14:40,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:14:40,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 02:14:40,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:41,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:41,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:41,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:14:41,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824669464] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 02:14:41,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2021-11-07 02:14:41,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 10, 7, 7, 9] total 38 [2021-11-07 02:14:41,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696839829] [2021-11-07 02:14:41,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:14:41,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:41,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:14:41,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1091, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 02:14:41,851 INFO L87 Difference]: Start difference. First operand 761 states and 2457 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 02:14:42,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:42,843 INFO L93 Difference]: Finished difference Result 1145 states and 3627 transitions. [2021-11-07 02:14:42,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:14:42,844 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 22 [2021-11-07 02:14:42,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:42,849 INFO L225 Difference]: With dead ends: 1145 [2021-11-07 02:14:42,850 INFO L226 Difference]: Without dead ends: 1145 [2021-11-07 02:14:42,851 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=426, Invalid=1644, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 02:14:42,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-11-07 02:14:42,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 757. [2021-11-07 02:14:42,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 3.236772486772487) internal successors, (2447), 756 states have internal predecessors, (2447), 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 02:14:42,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 2447 transitions. [2021-11-07 02:14:42,885 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 2447 transitions. Word has length 22 [2021-11-07 02:14:42,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:42,885 INFO L470 AbstractCegarLoop]: Abstraction has 757 states and 2447 transitions. [2021-11-07 02:14:42,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 02:14:42,885 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 2447 transitions. [2021-11-07 02:14:42,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 02:14:42,888 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:42,888 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] [2021-11-07 02:14:42,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-11-07 02:14:43,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:43,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:43,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:43,490 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 02:14:43,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:43,491 INFO L85 PathProgramCache]: Analyzing trace with hash -11994551, now seen corresponding path program 19 times [2021-11-07 02:14:43,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:43,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1531674235] [2021-11-07 02:14:43,492 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 02:14:43,492 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:43,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:43,494 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:43,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-11-07 02:14:45,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:45,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 02:14:45,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:45,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:14:45,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:45,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:14:45,734 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:45,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1531674235] [2021-11-07 02:14:45,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1531674235] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 02:14:45,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 02:14:45,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2021-11-07 02:14:45,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493592394] [2021-11-07 02:14:45,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 02:14:45,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:45,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 02:14:45,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:14:45,735 INFO L87 Difference]: Start difference. First operand 757 states and 2447 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 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 02:14:46,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:46,415 INFO L93 Difference]: Finished difference Result 1273 states and 3959 transitions. [2021-11-07 02:14:46,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:14:46,416 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 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 22 [2021-11-07 02:14:46,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:46,420 INFO L225 Difference]: With dead ends: 1273 [2021-11-07 02:14:46,420 INFO L226 Difference]: Without dead ends: 1259 [2021-11-07 02:14:46,421 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-11-07 02:14:46,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2021-11-07 02:14:46,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 755. [2021-11-07 02:14:46,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 3.2519893899204244) internal successors, (2452), 754 states have internal predecessors, (2452), 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 02:14:46,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2452 transitions. [2021-11-07 02:14:46,457 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2452 transitions. Word has length 22 [2021-11-07 02:14:46,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:46,457 INFO L470 AbstractCegarLoop]: Abstraction has 755 states and 2452 transitions. [2021-11-07 02:14:46,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 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 02:14:46,458 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2452 transitions. [2021-11-07 02:14:46,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 02:14:46,471 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:46,472 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] [2021-11-07 02:14:46,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:46,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:46,686 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 02:14:46,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:46,686 INFO L85 PathProgramCache]: Analyzing trace with hash -192208713, now seen corresponding path program 20 times [2021-11-07 02:14:46,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:46,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [743063620] [2021-11-07 02:14:46,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:14:46,687 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:46,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:46,689 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:46,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-11-07 02:14:48,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:14:48,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:14:48,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 02:14:48,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:48,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:48,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:49,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:49,183 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:49,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [743063620] [2021-11-07 02:14:49,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [743063620] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:14:49,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [289037943] [2021-11-07 02:14:49,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:14:49,184 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:14:49,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:14:49,185 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:14:49,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2021-11-07 02:14:51,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:14:51,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:14:51,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 02:14:51,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:51,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:14:51,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:51,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:14:51,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [289037943] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 02:14:51,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-11-07 02:14:51,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 10, 6] total 23 [2021-11-07 02:14:51,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555700610] [2021-11-07 02:14:51,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:14:51,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:51,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:14:51,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-11-07 02:14:51,957 INFO L87 Difference]: Start difference. First operand 755 states and 2452 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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 02:14:52,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:52,638 INFO L93 Difference]: Finished difference Result 969 states and 3085 transitions. [2021-11-07 02:14:52,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 02:14:52,639 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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 22 [2021-11-07 02:14:52,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:52,643 INFO L225 Difference]: With dead ends: 969 [2021-11-07 02:14:52,643 INFO L226 Difference]: Without dead ends: 969 [2021-11-07 02:14:52,644 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=261, Invalid=731, Unknown=0, NotChecked=0, Total=992 [2021-11-07 02:14:52,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2021-11-07 02:14:52,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 739. [2021-11-07 02:14:52,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 3.2262872628726287) internal successors, (2381), 738 states have internal predecessors, (2381), 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 02:14:52,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2381 transitions. [2021-11-07 02:14:52,701 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2381 transitions. Word has length 22 [2021-11-07 02:14:52,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:52,701 INFO L470 AbstractCegarLoop]: Abstraction has 739 states and 2381 transitions. [2021-11-07 02:14:52,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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 02:14:52,701 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2381 transitions. [2021-11-07 02:14:52,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 02:14:52,704 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:52,704 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] [2021-11-07 02:14:52,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:52,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (54)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:53,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:14:53,105 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 02:14:53,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:53,105 INFO L85 PathProgramCache]: Analyzing trace with hash 2122932603, now seen corresponding path program 1 times [2021-11-07 02:14:53,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:53,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1895052267] [2021-11-07 02:14:53,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:53,106 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:53,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:53,107 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:53,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-11-07 02:14:54,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:54,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 02:14:54,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:54,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:54,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:55,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:55,045 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:55,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1895052267] [2021-11-07 02:14:55,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1895052267] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 02:14:55,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 02:14:55,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2021-11-07 02:14:55,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676074716] [2021-11-07 02:14:55,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:14:55,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:55,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:14:55,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:14:55,046 INFO L87 Difference]: Start difference. First operand 739 states and 2381 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 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 02:14:55,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:55,451 INFO L93 Difference]: Finished difference Result 1215 states and 3692 transitions. [2021-11-07 02:14:55,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:14:55,452 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 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 22 [2021-11-07 02:14:55,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:55,455 INFO L225 Difference]: With dead ends: 1215 [2021-11-07 02:14:55,456 INFO L226 Difference]: Without dead ends: 1175 [2021-11-07 02:14:55,456 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:14:55,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-11-07 02:14:55,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 749. [2021-11-07 02:14:55,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 3.233957219251337) internal successors, (2419), 748 states have internal predecessors, (2419), 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 02:14:55,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2419 transitions. [2021-11-07 02:14:55,487 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2419 transitions. Word has length 22 [2021-11-07 02:14:55,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:55,488 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 2419 transitions. [2021-11-07 02:14:55,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 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 02:14:55,488 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2419 transitions. [2021-11-07 02:14:55,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 02:14:55,491 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:55,491 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] [2021-11-07 02:14:55,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:55,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:55,702 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 02:14:55,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:55,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1115298777, now seen corresponding path program 1 times [2021-11-07 02:14:55,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:55,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [153042340] [2021-11-07 02:14:55,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:55,703 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:55,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:55,704 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:55,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-11-07 02:14:57,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:57,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 02:14:57,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:57,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:57,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:57,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:57,925 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:57,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [153042340] [2021-11-07 02:14:57,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [153042340] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:57,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:57,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-07 02:14:57,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758103965] [2021-11-07 02:14:57,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 02:14:57,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:57,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 02:14:57,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:14:57,927 INFO L87 Difference]: Start difference. First operand 749 states and 2419 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 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 02:14:58,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:58,490 INFO L93 Difference]: Finished difference Result 1149 states and 3516 transitions. [2021-11-07 02:14:58,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:14:58,492 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 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 22 [2021-11-07 02:14:58,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:58,496 INFO L225 Difference]: With dead ends: 1149 [2021-11-07 02:14:58,496 INFO L226 Difference]: Without dead ends: 1103 [2021-11-07 02:14:58,496 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:14:58,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2021-11-07 02:14:58,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 755. [2021-11-07 02:14:58,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 3.226790450928382) internal successors, (2433), 754 states have internal predecessors, (2433), 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 02:14:58,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2433 transitions. [2021-11-07 02:14:58,535 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2433 transitions. Word has length 22 [2021-11-07 02:14:58,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:58,535 INFO L470 AbstractCegarLoop]: Abstraction has 755 states and 2433 transitions. [2021-11-07 02:14:58,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 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 02:14:58,536 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2433 transitions. [2021-11-07 02:14:58,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 02:14:58,539 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:58,539 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] [2021-11-07 02:14:58,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:58,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:58,746 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 02:14:58,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:58,746 INFO L85 PathProgramCache]: Analyzing trace with hash 2095258015, now seen corresponding path program 2 times [2021-11-07 02:14:58,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:58,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [75000127] [2021-11-07 02:14:58,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:14:58,747 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:58,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:58,748 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:58,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-11-07 02:15:00,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:15:00,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:15:00,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 02:15:00,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:00,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:15:00,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:00,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:15:00,749 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:00,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [75000127] [2021-11-07 02:15:00,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [75000127] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:00,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:15:00,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-07 02:15:00,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911822915] [2021-11-07 02:15:00,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 02:15:00,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:00,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 02:15:00,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:15:00,751 INFO L87 Difference]: Start difference. First operand 755 states and 2433 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 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 02:15:01,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:01,222 INFO L93 Difference]: Finished difference Result 1051 states and 3275 transitions. [2021-11-07 02:15:01,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 02:15:01,223 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 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 22 [2021-11-07 02:15:01,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:01,227 INFO L225 Difference]: With dead ends: 1051 [2021-11-07 02:15:01,228 INFO L226 Difference]: Without dead ends: 1019 [2021-11-07 02:15:01,228 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:15:01,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2021-11-07 02:15:01,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 737. [2021-11-07 02:15:01,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 3.2404891304347827) internal successors, (2385), 736 states have internal predecessors, (2385), 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 02:15:01,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2385 transitions. [2021-11-07 02:15:01,260 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2385 transitions. Word has length 22 [2021-11-07 02:15:01,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:01,260 INFO L470 AbstractCegarLoop]: Abstraction has 737 states and 2385 transitions. [2021-11-07 02:15:01,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 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 02:15:01,261 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2385 transitions. [2021-11-07 02:15:01,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 02:15:01,264 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:01,264 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] [2021-11-07 02:15:01,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:01,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:01,484 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 02:15:01,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:01,484 INFO L85 PathProgramCache]: Analyzing trace with hash -999108849, now seen corresponding path program 3 times [2021-11-07 02:15:01,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:01,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [907762600] [2021-11-07 02:15:01,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:15:01,485 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:01,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:01,487 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:01,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-11-07 02:15:03,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 02:15:03,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:15:03,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 02:15:03,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:03,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:15:03,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:03,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:15:03,570 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:03,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [907762600] [2021-11-07 02:15:03,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [907762600] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:15:03,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1681354788] [2021-11-07 02:15:03,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:15:03,571 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:15:03,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:15:03,574 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:15:03,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2021-11-07 02:15:05,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 02:15:05,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:15:06,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 02:15:06,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:06,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:15:06,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:06,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:15:06,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1681354788] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:06,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:15:06,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 6] imperfect sequences [6, 6] total 19 [2021-11-07 02:15:06,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479899495] [2021-11-07 02:15:06,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:15:06,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:06,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:15:06,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-11-07 02:15:06,496 INFO L87 Difference]: Start difference. First operand 737 states and 2385 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 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 02:15:07,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:07,061 INFO L93 Difference]: Finished difference Result 705 states and 2203 transitions. [2021-11-07 02:15:07,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:15:07,061 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 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 22 [2021-11-07 02:15:07,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:07,064 INFO L225 Difference]: With dead ends: 705 [2021-11-07 02:15:07,064 INFO L226 Difference]: Without dead ends: 679 [2021-11-07 02:15:07,064 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-11-07 02:15:07,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-11-07 02:15:07,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 633. [2021-11-07 02:15:07,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 3.2278481012658227) internal successors, (2040), 632 states have internal predecessors, (2040), 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 02:15:07,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 2040 transitions. [2021-11-07 02:15:07,088 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 2040 transitions. Word has length 22 [2021-11-07 02:15:07,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:07,088 INFO L470 AbstractCegarLoop]: Abstraction has 633 states and 2040 transitions. [2021-11-07 02:15:07,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 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 02:15:07,089 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 2040 transitions. [2021-11-07 02:15:07,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 02:15:07,091 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:07,092 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] [2021-11-07 02:15:07,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (59)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:07,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:07,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:07,500 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 02:15:07,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:07,501 INFO L85 PathProgramCache]: Analyzing trace with hash -611349647, now seen corresponding path program 2 times [2021-11-07 02:15:07,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:07,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1840797490] [2021-11-07 02:15:07,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:15:07,501 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:07,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:07,502 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:07,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2021-11-07 02:15:09,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:15:09,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:15:09,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 02:15:09,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:09,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:15:09,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:09,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:15:09,507 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:09,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1840797490] [2021-11-07 02:15:09,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1840797490] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:09,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:15:09,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-07 02:15:09,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445923625] [2021-11-07 02:15:09,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 02:15:09,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:09,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 02:15:09,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:15:09,509 INFO L87 Difference]: Start difference. First operand 633 states and 2040 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 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 02:15:10,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:10,027 INFO L93 Difference]: Finished difference Result 907 states and 2935 transitions. [2021-11-07 02:15:10,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:15:10,030 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 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 22 [2021-11-07 02:15:10,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:10,034 INFO L225 Difference]: With dead ends: 907 [2021-11-07 02:15:10,034 INFO L226 Difference]: Without dead ends: 859 [2021-11-07 02:15:10,035 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:15:10,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2021-11-07 02:15:10,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 615. [2021-11-07 02:15:10,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 614 states have (on average 3.2198697068403908) internal successors, (1977), 614 states have internal predecessors, (1977), 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 02:15:10,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 1977 transitions. [2021-11-07 02:15:10,062 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 1977 transitions. Word has length 22 [2021-11-07 02:15:10,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:10,063 INFO L470 AbstractCegarLoop]: Abstraction has 615 states and 1977 transitions. [2021-11-07 02:15:10,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 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 02:15:10,063 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 1977 transitions. [2021-11-07 02:15:10,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 02:15:10,066 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:10,066 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] [2021-11-07 02:15:10,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:10,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:10,282 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 02:15:10,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:10,283 INFO L85 PathProgramCache]: Analyzing trace with hash 143588335, now seen corresponding path program 3 times [2021-11-07 02:15:10,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:10,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [952407602] [2021-11-07 02:15:10,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:15:10,284 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:10,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:10,286 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:10,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2021-11-07 02:15:12,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 02:15:12,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:15:12,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 02:15:12,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:12,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:15:12,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:12,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:15:12,658 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:12,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [952407602] [2021-11-07 02:15:12,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [952407602] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:12,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:15:12,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-07 02:15:12,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548227700] [2021-11-07 02:15:12,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 02:15:12,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:12,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 02:15:12,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:15:12,660 INFO L87 Difference]: Start difference. First operand 615 states and 1977 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 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 02:15:13,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:13,497 INFO L93 Difference]: Finished difference Result 1207 states and 3982 transitions. [2021-11-07 02:15:13,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:15:13,498 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 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 22 [2021-11-07 02:15:13,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:13,502 INFO L225 Difference]: With dead ends: 1207 [2021-11-07 02:15:13,502 INFO L226 Difference]: Without dead ends: 1156 [2021-11-07 02:15:13,502 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-11-07 02:15:13,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2021-11-07 02:15:13,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 552. [2021-11-07 02:15:13,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 3.2958257713248638) internal successors, (1816), 551 states have internal predecessors, (1816), 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 02:15:13,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 1816 transitions. [2021-11-07 02:15:13,524 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 1816 transitions. Word has length 22 [2021-11-07 02:15:13,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:13,524 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 1816 transitions. [2021-11-07 02:15:13,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 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 02:15:13,524 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 1816 transitions. [2021-11-07 02:15:13,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 02:15:13,527 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:13,527 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:15:13,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:13,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:13,734 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 02:15:13,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:13,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1002415428, now seen corresponding path program 1 times [2021-11-07 02:15:13,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:13,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1980285530] [2021-11-07 02:15:13,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:13,735 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:13,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:13,736 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:13,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2021-11-07 02:15:15,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:15,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-07 02:15:15,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:15,909 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-07 02:15:15,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 19 [2021-11-07 02:15:16,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:15:16,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:17,989 INFO L354 Elim1Store]: treesize reduction 442, result has 10.0 percent of original size [2021-11-07 02:15:17,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 89 treesize of output 68 [2021-11-07 02:15:25,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:15:25,570 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:25,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1980285530] [2021-11-07 02:15:25,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1980285530] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:15:25,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [305197789] [2021-11-07 02:15:25,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:25,571 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:15:25,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:15:25,574 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:15:25,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2021-11-07 02:15:28,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:28,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-07 02:15:28,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:28,649 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:28,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 19 [2021-11-07 02:15:28,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:15:28,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:29,210 INFO L354 Elim1Store]: treesize reduction 442, result has 10.0 percent of original size [2021-11-07 02:15:29,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 89 treesize of output 68 [2021-11-07 02:15:34,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:15:34,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [305197789] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:15:34,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832431834] [2021-11-07 02:15:34,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:34,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:15:34,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:15:34,426 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:15:34,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-11-07 02:15:36,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:36,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-07 02:15:36,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:36,904 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:36,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 19 [2021-11-07 02:15:37,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:15:37,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:37,345 INFO L354 Elim1Store]: treesize reduction 442, result has 10.0 percent of original size [2021-11-07 02:15:37,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 89 treesize of output 68 [2021-11-07 02:15:42,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:15:42,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832431834] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:15:42,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:15:42,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 7, 5, 7, 5] total 17 [2021-11-07 02:15:42,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784796314] [2021-11-07 02:15:42,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 02:15:42,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:42,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 02:15:42,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=262, Unknown=3, NotChecked=0, Total=342 [2021-11-07 02:15:42,216 INFO L87 Difference]: Start difference. First operand 552 states and 1816 transitions. Second operand has 19 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 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 02:15:43,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:43,335 INFO L93 Difference]: Finished difference Result 903 states and 2996 transitions. [2021-11-07 02:15:43,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:15:43,336 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 02:15:43,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:43,340 INFO L225 Difference]: With dead ends: 903 [2021-11-07 02:15:43,341 INFO L226 Difference]: Without dead ends: 892 [2021-11-07 02:15:43,341 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 117 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=137, Invalid=412, Unknown=3, NotChecked=0, Total=552 [2021-11-07 02:15:43,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2021-11-07 02:15:43,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 643. [2021-11-07 02:15:43,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 3.378504672897196) internal successors, (2169), 642 states have internal predecessors, (2169), 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 02:15:43,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 2169 transitions. [2021-11-07 02:15:43,361 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 2169 transitions. Word has length 24 [2021-11-07 02:15:43,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:43,362 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 2169 transitions. [2021-11-07 02:15:43,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 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 02:15:43,362 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 2169 transitions. [2021-11-07 02:15:43,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 02:15:43,364 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:43,364 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:15:43,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:43,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:43,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (63)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:43,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:15:43,981 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-07 02:15:43,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:43,981 INFO L85 PathProgramCache]: Analyzing trace with hash -288146696, now seen corresponding path program 2 times [2021-11-07 02:15:43,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:43,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1127815891] [2021-11-07 02:15:43,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:15:43,982 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:43,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:43,983 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:43,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcdafbb-6bc5-4bbe-959f-c38bf80d13f2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2021-11-07 02:15:45,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:15:45,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:15:45,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-07 02:15:45,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:45,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 763 treesize of output 755 [2021-11-07 02:15:46,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 37 [2021-11-07 02:15:56,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:56,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:56,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:56,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:56,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:15:56,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:56,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:56,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:56,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:15:56,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:15:57,877 INFO L354 Elim1Store]: treesize reduction 1479, result has 12.9 percent of original size [2021-11-07 02:15:57,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 39 case distinctions, treesize of input 102 treesize of output 262 [2021-11-07 02:18:42,232 INFO L354 Elim1Store]: treesize reduction 326, result has 38.6 percent of original size [2021-11-07 02:18:42,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 257 treesize of output 391 [2021-11-07 02:18:42,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 02:18:42,354 INFO L328 TraceCheckSpWp]: Computing backward predicates...