./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c2bb9f0c15e3c3296f863c26b4377b27546cf1c417a60e9663a6ff48eb617ef8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:26:10,990 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:26:10,992 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:26:11,023 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:26:11,024 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:26:11,025 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:26:11,027 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:26:11,029 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:26:11,031 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:26:11,032 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:26:11,033 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:26:11,035 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:26:11,035 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:26:11,036 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:26:11,038 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:26:11,039 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:26:11,040 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:26:11,041 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:26:11,043 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:26:11,046 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:26:11,048 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:26:11,051 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:26:11,053 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:26:11,054 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:26:11,057 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:26:11,058 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:26:11,058 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:26:11,059 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:26:11,060 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:26:11,061 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:26:11,061 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:26:11,062 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:26:11,063 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:26:11,064 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:26:11,065 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:26:11,065 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:26:11,066 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:26:11,073 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:26:11,073 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:26:11,075 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:26:11,075 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:26:11,076 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-21 01:26:11,126 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:26:11,126 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:26:11,126 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:26:11,126 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:26:11,127 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:26:11,127 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:26:11,127 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:26:11,128 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:26:11,128 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:26:11,128 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:26:11,128 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:26:11,128 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:26:11,128 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:26:11,129 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:26:11,129 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:26:11,129 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:26:11,129 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:26:11,129 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:26:11,130 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-21 01:26:11,130 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-21 01:26:11,135 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:26:11,136 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:26:11,136 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 01:26:11,138 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:26:11,138 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:26:11,138 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:26:11,138 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-21 01:26:11,138 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-21 01:26:11,139 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-21 01:26:11,139 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:26:11,139 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-21 01:26:11,140 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:26:11,140 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:26:11,140 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:26:11,140 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:26:11,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:26:11,141 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:26:11,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:26:11,142 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:26:11,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:26:11,142 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:26:11,142 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:26:11,142 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_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2bb9f0c15e3c3296f863c26b4377b27546cf1c417a60e9663a6ff48eb617ef8 [2021-11-21 01:26:11,423 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:26:11,450 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:26:11,453 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:26:11,454 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:26:11,455 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:26:11,457 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i [2021-11-21 01:26:11,524 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/data/d39e7f1d7/9c20e821860e4489b7406b1a64d5ab01/FLAG270ccc5b7 [2021-11-21 01:26:12,138 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:26:12,155 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i [2021-11-21 01:26:12,191 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/data/d39e7f1d7/9c20e821860e4489b7406b1a64d5ab01/FLAG270ccc5b7 [2021-11-21 01:26:12,414 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/data/d39e7f1d7/9c20e821860e4489b7406b1a64d5ab01 [2021-11-21 01:26:12,416 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:26:12,418 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:26:12,423 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:26:12,423 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:26:12,426 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:26:12,427 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:26:12" (1/1) ... [2021-11-21 01:26:12,429 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a448bd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:26:12, skipping insertion in model container [2021-11-21 01:26:12,431 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:26:12" (1/1) ... [2021-11-21 01:26:12,438 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:26:12,517 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:26:12,998 WARN L230 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_c2552f7f-b850-42e6-a1ab-9819b902f506/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i[33021,33034] [2021-11-21 01:26:13,115 WARN L230 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_c2552f7f-b850-42e6-a1ab-9819b902f506/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i[44124,44137] [2021-11-21 01:26:13,116 WARN L230 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_c2552f7f-b850-42e6-a1ab-9819b902f506/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i[44245,44258] [2021-11-21 01:26:13,125 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:26:13,135 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) [2021-11-21 01:26:13,135 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@75043d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:26:13, skipping insertion in model container [2021-11-21 01:26:13,135 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:26:13,136 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-21 01:26:13,138 INFO L158 Benchmark]: Toolchain (without parser) took 718.75ms. Allocated memory is still 121.6MB. Free memory was 78.9MB in the beginning and 85.7MB in the end (delta: -6.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-21 01:26:13,138 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 121.6MB. Free memory is still 98.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:26:13,143 INFO L158 Benchmark]: CACSL2BoogieTranslator took 713.13ms. Allocated memory is still 121.6MB. Free memory was 78.7MB in the beginning and 85.7MB in the end (delta: -7.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-21 01:26:13,144 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 121.6MB. Free memory is still 98.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 713.13ms. Allocated memory is still 121.6MB. Free memory was 78.7MB in the beginning and 85.7MB in the end (delta: -7.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 716]: 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_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c2bb9f0c15e3c3296f863c26b4377b27546cf1c417a60e9663a6ff48eb617ef8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:26:15,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:26:15,268 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:26:15,302 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:26:15,303 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:26:15,304 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:26:15,306 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:26:15,308 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:26:15,310 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:26:15,311 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:26:15,313 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:26:15,314 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:26:15,314 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:26:15,316 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:26:15,317 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:26:15,319 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:26:15,323 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:26:15,324 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:26:15,326 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:26:15,329 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:26:15,331 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:26:15,340 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:26:15,341 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:26:15,342 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:26:15,346 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:26:15,347 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:26:15,347 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:26:15,348 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:26:15,349 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:26:15,350 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:26:15,350 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:26:15,358 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:26:15,359 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:26:15,359 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:26:15,361 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:26:15,361 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:26:15,362 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:26:15,362 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:26:15,362 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:26:15,363 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:26:15,364 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:26:15,365 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-21 01:26:15,393 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:26:15,394 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:26:15,394 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:26:15,394 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:26:15,395 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:26:15,395 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:26:15,395 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:26:15,395 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:26:15,396 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:26:15,396 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:26:15,396 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:26:15,396 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:26:15,397 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-21 01:26:15,397 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-21 01:26:15,397 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:26:15,397 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:26:15,398 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 01:26:15,398 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:26:15,398 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:26:15,398 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:26:15,398 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-21 01:26:15,399 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-21 01:26:15,399 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-21 01:26:15,399 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:26:15,399 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-21 01:26:15,399 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-21 01:26:15,400 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-21 01:26:15,400 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:26:15,400 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:26:15,400 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:26:15,400 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-21 01:26:15,401 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:26:15,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:26:15,401 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:26:15,401 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:26:15,401 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-21 01:26:15,402 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-21 01:26:15,402 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:26:15,402 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:26:15,402 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_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2bb9f0c15e3c3296f863c26b4377b27546cf1c417a60e9663a6ff48eb617ef8 [2021-11-21 01:26:15,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:26:15,810 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:26:15,814 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:26:15,815 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:26:15,816 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:26:15,817 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i [2021-11-21 01:26:15,885 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/data/c02cd7409/da071515816844cabe2c631097b8c05f/FLAGaea154daf [2021-11-21 01:26:16,523 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:26:16,523 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i [2021-11-21 01:26:16,542 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/data/c02cd7409/da071515816844cabe2c631097b8c05f/FLAGaea154daf [2021-11-21 01:26:16,789 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/data/c02cd7409/da071515816844cabe2c631097b8c05f [2021-11-21 01:26:16,792 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:26:16,793 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:26:16,794 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:26:16,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:26:16,801 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:26:16,802 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:26:16" (1/1) ... [2021-11-21 01:26:16,803 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72edf203 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:26:16, skipping insertion in model container [2021-11-21 01:26:16,803 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:26:16" (1/1) ... [2021-11-21 01:26:16,810 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:26:16,872 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:26:17,325 WARN L230 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_c2552f7f-b850-42e6-a1ab-9819b902f506/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i[33021,33034] [2021-11-21 01:26:17,447 WARN L230 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_c2552f7f-b850-42e6-a1ab-9819b902f506/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i[44124,44137] [2021-11-21 01:26:17,449 WARN L230 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_c2552f7f-b850-42e6-a1ab-9819b902f506/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i[44245,44258] [2021-11-21 01:26:17,457 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:26:17,470 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-21 01:26:17,485 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:26:17,504 WARN L230 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_c2552f7f-b850-42e6-a1ab-9819b902f506/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i[33021,33034] [2021-11-21 01:26:17,583 WARN L230 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_c2552f7f-b850-42e6-a1ab-9819b902f506/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i[44124,44137] [2021-11-21 01:26:17,584 WARN L230 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_c2552f7f-b850-42e6-a1ab-9819b902f506/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i[44245,44258] [2021-11-21 01:26:17,588 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:26:17,593 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:26:17,621 WARN L230 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_c2552f7f-b850-42e6-a1ab-9819b902f506/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i[33021,33034] [2021-11-21 01:26:17,679 WARN L230 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_c2552f7f-b850-42e6-a1ab-9819b902f506/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i[44124,44137] [2021-11-21 01:26:17,680 WARN L230 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_c2552f7f-b850-42e6-a1ab-9819b902f506/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i[44245,44258] [2021-11-21 01:26:17,683 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:26:17,727 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:26:17,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:26:17 WrapperNode [2021-11-21 01:26:17,728 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:26:17,729 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:26:17,729 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:26:17,730 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:26:17,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:26:17" (1/1) ... [2021-11-21 01:26:17,773 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:26:17" (1/1) ... [2021-11-21 01:26:17,847 INFO L137 Inliner]: procedures = 179, calls = 277, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1011 [2021-11-21 01:26:17,847 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:26:17,848 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:26:17,848 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:26:17,848 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:26:17,858 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:26:17" (1/1) ... [2021-11-21 01:26:17,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:26:17" (1/1) ... [2021-11-21 01:26:17,870 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:26:17" (1/1) ... [2021-11-21 01:26:17,870 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:26:17" (1/1) ... [2021-11-21 01:26:17,939 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:26:17" (1/1) ... [2021-11-21 01:26:17,952 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:26:17" (1/1) ... [2021-11-21 01:26:17,972 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:26:17" (1/1) ... [2021-11-21 01:26:17,983 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:26:17,984 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:26:17,984 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:26:17,984 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:26:17,985 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:26:17" (1/1) ... [2021-11-21 01:26:17,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:26:18,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:26:18,015 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:26:18,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:26:18,077 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-21 01:26:18,077 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-21 01:26:18,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-21 01:26:18,078 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-21 01:26:18,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:26:18,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:26:18,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:26:18,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:26:18,079 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-21 01:26:18,079 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:26:18,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:26:18,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-21 01:26:18,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-21 01:26:18,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:26:18,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:26:18,356 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:26:18,358 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:26:18,362 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-21 01:26:23,136 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:26:23,152 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:26:23,152 INFO L301 CfgBuilder]: Removed 63 assume(true) statements. [2021-11-21 01:26:23,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:26:23 BoogieIcfgContainer [2021-11-21 01:26:23,157 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:26:23,159 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:26:23,159 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:26:23,162 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:26:23,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:26:16" (1/3) ... [2021-11-21 01:26:23,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27709612 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:26:23, skipping insertion in model container [2021-11-21 01:26:23,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:26:17" (2/3) ... [2021-11-21 01:26:23,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27709612 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:26:23, skipping insertion in model container [2021-11-21 01:26:23,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:26:23" (3/3) ... [2021-11-21 01:26:23,165 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test7-1.i [2021-11-21 01:26:23,171 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:26:23,171 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 530 error locations. [2021-11-21 01:26:23,216 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:26:23,223 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-11-21 01:26:23,223 INFO L340 AbstractCegarLoop]: Starting to check reachability of 530 error locations. [2021-11-21 01:26:23,254 INFO L276 IsEmpty]: Start isEmpty. Operand has 1050 states, 518 states have (on average 2.2548262548262548) internal successors, (1168), 1045 states have internal predecessors, (1168), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:26:23,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-21 01:26:23,260 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:23,261 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-21 01:26:23,261 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-21 01:26:23,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:23,267 INFO L85 PathProgramCache]: Analyzing trace with hash 38794, now seen corresponding path program 1 times [2021-11-21 01:26:23,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:26:23,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1396931820] [2021-11-21 01:26:23,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:23,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:26:23,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:26:23,285 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:26:23,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-21 01:26:23,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:23,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:26:23,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:23,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:26:23,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:23,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:23,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:23,582 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:26:23,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1396931820] [2021-11-21 01:26:23,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1396931820] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:23,584 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:26:23,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-21 01:26:23,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354377043] [2021-11-21 01:26:23,587 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:23,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:26:23,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:26:23,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:26:23,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:26:23,651 INFO L87 Difference]: Start difference. First operand has 1050 states, 518 states have (on average 2.2548262548262548) internal successors, (1168), 1045 states have internal predecessors, (1168), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:25,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:25,683 INFO L93 Difference]: Finished difference Result 1041 states and 1096 transitions. [2021-11-21 01:26:25,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:26:25,686 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-11-21 01:26:25,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:25,705 INFO L225 Difference]: With dead ends: 1041 [2021-11-21 01:26:25,705 INFO L226 Difference]: Without dead ends: 1039 [2021-11-21 01:26:25,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:26:25,721 INFO L933 BasicCegarLoop]: 618 mSDtfsCounter, 969 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:25,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [972 Valid, 670 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-21 01:26:25,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2021-11-21 01:26:25,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 1031. [2021-11-21 01:26:25,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 516 states have (on average 2.0949612403100777) internal successors, (1081), 1026 states have internal predecessors, (1081), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:26:25,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1087 transitions. [2021-11-21 01:26:25,835 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1087 transitions. Word has length 3 [2021-11-21 01:26:25,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:25,835 INFO L470 AbstractCegarLoop]: Abstraction has 1031 states and 1087 transitions. [2021-11-21 01:26:25,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:25,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1087 transitions. [2021-11-21 01:26:25,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-21 01:26:25,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:25,838 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-21 01:26:25,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:26,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:26:26,055 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-21 01:26:26,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:26,056 INFO L85 PathProgramCache]: Analyzing trace with hash 38795, now seen corresponding path program 1 times [2021-11-21 01:26:26,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:26:26,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1957999685] [2021-11-21 01:26:26,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:26,057 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:26:26,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:26:26,060 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:26:26,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-21 01:26:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:26,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:26:26,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:26,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:26:26,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:26,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:26,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:26,248 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:26:26,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1957999685] [2021-11-21 01:26:26,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1957999685] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:26,251 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:26:26,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-21 01:26:26,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332314391] [2021-11-21 01:26:26,252 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:26,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:26:26,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:26:26,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:26:26,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:26:26,255 INFO L87 Difference]: Start difference. First operand 1031 states and 1087 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:30,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:30,078 INFO L93 Difference]: Finished difference Result 1496 states and 1584 transitions. [2021-11-21 01:26:30,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:26:30,079 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 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 3 [2021-11-21 01:26:30,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:30,087 INFO L225 Difference]: With dead ends: 1496 [2021-11-21 01:26:30,088 INFO L226 Difference]: Without dead ends: 1496 [2021-11-21 01:26:30,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:26:30,089 INFO L933 BasicCegarLoop]: 757 mSDtfsCounter, 1544 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1544 SdHoareTripleChecker+Valid, 1364 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:30,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1544 Valid, 1364 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-11-21 01:26:30,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-11-21 01:26:30,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 1066. [2021-11-21 01:26:30,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 560 states have (on average 2.0714285714285716) internal successors, (1160), 1061 states have internal predecessors, (1160), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:26:30,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1166 transitions. [2021-11-21 01:26:30,119 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1166 transitions. Word has length 3 [2021-11-21 01:26:30,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:30,120 INFO L470 AbstractCegarLoop]: Abstraction has 1066 states and 1166 transitions. [2021-11-21 01:26:30,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:30,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1166 transitions. [2021-11-21 01:26:30,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 01:26:30,121 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:30,121 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:30,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:30,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:26:30,333 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-21 01:26:30,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:30,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1768476910, now seen corresponding path program 1 times [2021-11-21 01:26:30,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:26:30,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1845524681] [2021-11-21 01:26:30,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:30,335 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:26:30,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:26:30,336 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:26:30,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-21 01:26:30,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:30,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:26:30,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:30,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:26:30,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:30,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:30,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:30,525 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:26:30,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1845524681] [2021-11-21 01:26:30,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1845524681] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:30,526 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:26:30,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-21 01:26:30,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671135724] [2021-11-21 01:26:30,527 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:30,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:26:30,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:26:30,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:26:30,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:26:30,528 INFO L87 Difference]: Start difference. First operand 1066 states and 1166 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:32,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:32,705 INFO L93 Difference]: Finished difference Result 1396 states and 1521 transitions. [2021-11-21 01:26:32,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:26:32,707 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-11-21 01:26:32,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:32,714 INFO L225 Difference]: With dead ends: 1396 [2021-11-21 01:26:32,715 INFO L226 Difference]: Without dead ends: 1396 [2021-11-21 01:26:32,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:26:32,716 INFO L933 BasicCegarLoop]: 925 mSDtfsCounter, 975 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 978 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:32,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [978 Valid, 1168 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-21 01:26:32,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2021-11-21 01:26:32,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 1019. [2021-11-21 01:26:32,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 560 states have (on average 1.9821428571428572) internal successors, (1110), 1014 states have internal predecessors, (1110), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:26:32,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1116 transitions. [2021-11-21 01:26:32,743 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1116 transitions. Word has length 8 [2021-11-21 01:26:32,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:32,744 INFO L470 AbstractCegarLoop]: Abstraction has 1019 states and 1116 transitions. [2021-11-21 01:26:32,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:32,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1116 transitions. [2021-11-21 01:26:32,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 01:26:32,745 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:32,745 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:32,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:32,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:26:32,962 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-21 01:26:32,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:32,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1768476909, now seen corresponding path program 1 times [2021-11-21 01:26:32,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:26:32,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1333915058] [2021-11-21 01:26:32,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:32,964 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:26:32,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:26:32,965 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:26:32,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-21 01:26:33,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:33,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:26:33,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:33,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:26:33,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:33,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:33,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:33,235 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:26:33,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1333915058] [2021-11-21 01:26:33,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1333915058] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:33,236 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:26:33,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-21 01:26:33,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330796270] [2021-11-21 01:26:33,236 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:33,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:26:33,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:26:33,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:26:33,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:26:33,238 INFO L87 Difference]: Start difference. First operand 1019 states and 1116 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:38,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:38,057 INFO L93 Difference]: Finished difference Result 1440 states and 1529 transitions. [2021-11-21 01:26:38,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:26:38,058 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 8 [2021-11-21 01:26:38,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:38,066 INFO L225 Difference]: With dead ends: 1440 [2021-11-21 01:26:38,066 INFO L226 Difference]: Without dead ends: 1440 [2021-11-21 01:26:38,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:26:38,067 INFO L933 BasicCegarLoop]: 1099 mSDtfsCounter, 717 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 1147 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 1909 SdHoareTripleChecker+Invalid, 1161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:38,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [718 Valid, 1909 Invalid, 1161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1147 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-11-21 01:26:38,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2021-11-21 01:26:38,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1009. [2021-11-21 01:26:38,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 560 states have (on average 1.9589285714285714) internal successors, (1097), 1004 states have internal predecessors, (1097), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:26:38,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 1103 transitions. [2021-11-21 01:26:38,093 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 1103 transitions. Word has length 8 [2021-11-21 01:26:38,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:38,093 INFO L470 AbstractCegarLoop]: Abstraction has 1009 states and 1103 transitions. [2021-11-21 01:26:38,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:38,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 1103 transitions. [2021-11-21 01:26:38,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 01:26:38,094 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:38,095 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:38,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-21 01:26:38,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:26:38,306 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr526ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-21 01:26:38,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:38,306 INFO L85 PathProgramCache]: Analyzing trace with hash 871378613, now seen corresponding path program 1 times [2021-11-21 01:26:38,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:26:38,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1363835675] [2021-11-21 01:26:38,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:38,307 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:26:38,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:26:38,308 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:26:38,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-21 01:26:38,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:38,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:26:38,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:38,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:38,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:38,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:38,609 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:26:38,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1363835675] [2021-11-21 01:26:38,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1363835675] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:38,610 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:26:38,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-21 01:26:38,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618558121] [2021-11-21 01:26:38,610 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:38,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:26:38,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:26:38,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:26:38,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:26:38,612 INFO L87 Difference]: Start difference. First operand 1009 states and 1103 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:39,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:39,325 INFO L93 Difference]: Finished difference Result 1456 states and 1582 transitions. [2021-11-21 01:26:39,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:26:39,327 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-11-21 01:26:39,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:39,335 INFO L225 Difference]: With dead ends: 1456 [2021-11-21 01:26:39,336 INFO L226 Difference]: Without dead ends: 1456 [2021-11-21 01:26:39,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:26:39,339 INFO L933 BasicCegarLoop]: 1082 mSDtfsCounter, 548 mSDsluCounter, 1849 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 2931 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:39,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 2931 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 01:26:39,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2021-11-21 01:26:39,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1246. [2021-11-21 01:26:39,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 797 states have (on average 1.9422835633626099) internal successors, (1548), 1241 states have internal predecessors, (1548), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:26:39,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 1554 transitions. [2021-11-21 01:26:39,379 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 1554 transitions. Word has length 11 [2021-11-21 01:26:39,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:39,379 INFO L470 AbstractCegarLoop]: Abstraction has 1246 states and 1554 transitions. [2021-11-21 01:26:39,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:39,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 1554 transitions. [2021-11-21 01:26:39,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-21 01:26:39,381 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:39,381 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:39,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:39,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:26:39,587 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr529ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-21 01:26:39,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:39,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1242933253, now seen corresponding path program 1 times [2021-11-21 01:26:39,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:26:39,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1598955803] [2021-11-21 01:26:39,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:39,591 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:26:39,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:26:39,592 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:26:39,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-21 01:26:39,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:39,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:26:39,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:39,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:26:39,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:26:39,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:26:39,798 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-21 01:26:39,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-21 01:26:39,871 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-21 01:26:39,871 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 67 treesize of output 23 [2021-11-21 01:26:39,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:39,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:39,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:39,971 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:26:39,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1598955803] [2021-11-21 01:26:39,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1598955803] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:39,971 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:26:39,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 01:26:39,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507240701] [2021-11-21 01:26:39,972 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:39,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:26:39,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:26:39,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:26:39,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:26:39,973 INFO L87 Difference]: Start difference. First operand 1246 states and 1554 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:41,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:41,431 INFO L93 Difference]: Finished difference Result 1602 states and 1969 transitions. [2021-11-21 01:26:41,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:26:41,431 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 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 12 [2021-11-21 01:26:41,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:41,439 INFO L225 Difference]: With dead ends: 1602 [2021-11-21 01:26:41,439 INFO L226 Difference]: Without dead ends: 1602 [2021-11-21 01:26:41,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:26:41,441 INFO L933 BasicCegarLoop]: 967 mSDtfsCounter, 708 mSDsluCounter, 1825 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 2792 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:41,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [708 Valid, 2792 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-21 01:26:41,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1602 states. [2021-11-21 01:26:41,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1602 to 1245. [2021-11-21 01:26:41,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 796 states have (on average 1.9422110552763818) internal successors, (1546), 1240 states have internal predecessors, (1546), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:26:41,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 1552 transitions. [2021-11-21 01:26:41,473 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 1552 transitions. Word has length 12 [2021-11-21 01:26:41,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:41,474 INFO L470 AbstractCegarLoop]: Abstraction has 1245 states and 1552 transitions. [2021-11-21 01:26:41,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:41,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 1552 transitions. [2021-11-21 01:26:41,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-21 01:26:41,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:41,475 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:41,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:41,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:26:41,686 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-21 01:26:41,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:41,687 INFO L85 PathProgramCache]: Analyzing trace with hash -344619170, now seen corresponding path program 1 times [2021-11-21 01:26:41,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:26:41,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [693416182] [2021-11-21 01:26:41,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:41,688 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:26:41,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:26:41,689 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:26:41,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-21 01:26:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:41,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:26:41,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:41,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:41,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:41,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:41,892 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:26:41,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [693416182] [2021-11-21 01:26:41,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [693416182] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:41,892 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:26:41,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-21 01:26:41,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554761665] [2021-11-21 01:26:41,892 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:41,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:26:41,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:26:41,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:26:41,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:26:41,893 INFO L87 Difference]: Start difference. First operand 1245 states and 1552 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:41,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:41,923 INFO L93 Difference]: Finished difference Result 1185 states and 1466 transitions. [2021-11-21 01:26:41,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:26:41,923 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 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 18 [2021-11-21 01:26:41,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:41,930 INFO L225 Difference]: With dead ends: 1185 [2021-11-21 01:26:41,931 INFO L226 Difference]: Without dead ends: 1185 [2021-11-21 01:26:41,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:26:41,932 INFO L933 BasicCegarLoop]: 973 mSDtfsCounter, 1914 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1917 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:41,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1917 Valid, 995 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:26:41,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2021-11-21 01:26:41,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1185. [2021-11-21 01:26:41,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1185 states, 760 states have (on average 1.9210526315789473) internal successors, (1460), 1180 states have internal predecessors, (1460), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:26:41,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 1466 transitions. [2021-11-21 01:26:41,960 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 1466 transitions. Word has length 18 [2021-11-21 01:26:41,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:41,960 INFO L470 AbstractCegarLoop]: Abstraction has 1185 states and 1466 transitions. [2021-11-21 01:26:41,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:41,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 1466 transitions. [2021-11-21 01:26:41,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-21 01:26:41,970 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:41,970 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:41,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-21 01:26:42,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:26:42,183 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-21 01:26:42,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:42,184 INFO L85 PathProgramCache]: Analyzing trace with hash -466544200, now seen corresponding path program 1 times [2021-11-21 01:26:42,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:26:42,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [893456053] [2021-11-21 01:26:42,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:42,185 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:26:42,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:26:42,185 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:26:42,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-21 01:26:42,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:42,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:26:42,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:42,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:42,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:42,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:42,415 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:26:42,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [893456053] [2021-11-21 01:26:42,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [893456053] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:42,415 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:26:42,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-21 01:26:42,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829645482] [2021-11-21 01:26:42,416 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:42,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:26:42,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:26:42,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:26:42,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:26:42,416 INFO L87 Difference]: Start difference. First operand 1185 states and 1466 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:42,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:42,496 INFO L93 Difference]: Finished difference Result 1157 states and 1410 transitions. [2021-11-21 01:26:42,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:26:42,497 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 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 [2021-11-21 01:26:42,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:42,503 INFO L225 Difference]: With dead ends: 1157 [2021-11-21 01:26:42,503 INFO L226 Difference]: Without dead ends: 1157 [2021-11-21 01:26:42,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:26:42,504 INFO L933 BasicCegarLoop]: 928 mSDtfsCounter, 1846 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1849 SdHoareTripleChecker+Valid, 1871 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:42,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1849 Valid, 1871 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:26:42,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2021-11-21 01:26:42,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 1155. [2021-11-21 01:26:42,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 744 states have (on average 1.8844086021505377) internal successors, (1402), 1150 states have internal predecessors, (1402), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:26:42,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 1408 transitions. [2021-11-21 01:26:42,531 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 1408 transitions. Word has length 20 [2021-11-21 01:26:42,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:42,532 INFO L470 AbstractCegarLoop]: Abstraction has 1155 states and 1408 transitions. [2021-11-21 01:26:42,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:42,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 1408 transitions. [2021-11-21 01:26:42,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-21 01:26:42,533 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:42,534 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:42,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:42,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:26:42,746 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-21 01:26:42,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:42,746 INFO L85 PathProgramCache]: Analyzing trace with hash 2117531686, now seen corresponding path program 1 times [2021-11-21 01:26:42,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:26:42,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [554754933] [2021-11-21 01:26:42,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:42,747 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:26:42,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:26:42,748 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:26:42,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-21 01:26:42,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:42,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:26:42,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:42,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:26:42,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:42,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:43,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:43,108 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:26:43,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [554754933] [2021-11-21 01:26:43,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [554754933] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:43,108 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:26:43,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-21 01:26:43,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222011224] [2021-11-21 01:26:43,109 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:43,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:26:43,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:26:43,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:26:43,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:26:43,110 INFO L87 Difference]: Start difference. First operand 1155 states and 1408 transitions. Second operand has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:44,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:44,968 INFO L93 Difference]: Finished difference Result 1618 states and 1991 transitions. [2021-11-21 01:26:44,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:26:44,969 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2021-11-21 01:26:44,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:44,976 INFO L225 Difference]: With dead ends: 1618 [2021-11-21 01:26:44,976 INFO L226 Difference]: Without dead ends: 1618 [2021-11-21 01:26:44,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:26:44,977 INFO L933 BasicCegarLoop]: 491 mSDtfsCounter, 1684 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1684 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:44,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1684 Valid, 1009 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-21 01:26:44,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1618 states. [2021-11-21 01:26:45,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1618 to 1151. [2021-11-21 01:26:45,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 744 states have (on average 1.8736559139784945) internal successors, (1394), 1146 states have internal predecessors, (1394), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:26:45,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 1400 transitions. [2021-11-21 01:26:45,011 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 1400 transitions. Word has length 34 [2021-11-21 01:26:45,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:45,011 INFO L470 AbstractCegarLoop]: Abstraction has 1151 states and 1400 transitions. [2021-11-21 01:26:45,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:45,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 1400 transitions. [2021-11-21 01:26:45,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-21 01:26:45,013 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:45,013 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:45,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:45,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:26:45,224 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-21 01:26:45,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:45,224 INFO L85 PathProgramCache]: Analyzing trace with hash 2117531687, now seen corresponding path program 1 times [2021-11-21 01:26:45,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:26:45,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1002919079] [2021-11-21 01:26:45,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:45,225 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:26:45,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:26:45,226 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:26:45,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-21 01:26:45,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:45,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:26:45,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:45,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:26:45,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:45,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:46,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:46,116 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:26:46,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1002919079] [2021-11-21 01:26:46,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1002919079] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:46,117 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:26:46,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-21 01:26:46,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987422518] [2021-11-21 01:26:46,117 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:46,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:26:46,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:26:46,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:26:46,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:26:46,118 INFO L87 Difference]: Start difference. First operand 1151 states and 1400 transitions. Second operand has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:51,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:51,954 INFO L93 Difference]: Finished difference Result 1751 states and 2146 transitions. [2021-11-21 01:26:51,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:26:51,955 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 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 34 [2021-11-21 01:26:51,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:51,963 INFO L225 Difference]: With dead ends: 1751 [2021-11-21 01:26:51,963 INFO L226 Difference]: Without dead ends: 1751 [2021-11-21 01:26:51,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:26:51,964 INFO L933 BasicCegarLoop]: 1151 mSDtfsCounter, 1825 mSDsluCounter, 1244 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1825 SdHoareTripleChecker+Valid, 2395 SdHoareTripleChecker+Invalid, 1563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:51,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1825 Valid, 2395 Invalid, 1563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-11-21 01:26:51,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1751 states. [2021-11-21 01:26:51,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1751 to 1147. [2021-11-21 01:26:51,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 744 states have (on average 1.8629032258064515) internal successors, (1386), 1142 states have internal predecessors, (1386), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:26:51,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1392 transitions. [2021-11-21 01:26:51,995 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1392 transitions. Word has length 34 [2021-11-21 01:26:51,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:51,996 INFO L470 AbstractCegarLoop]: Abstraction has 1147 states and 1392 transitions. [2021-11-21 01:26:51,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:51,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1392 transitions. [2021-11-21 01:26:51,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-21 01:26:51,998 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:51,998 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:52,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:52,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:26:52,210 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-21 01:26:52,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:52,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1509555205, now seen corresponding path program 1 times [2021-11-21 01:26:52,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:26:52,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [944786779] [2021-11-21 01:26:52,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:52,211 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:26:52,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:26:52,212 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:26:52,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-21 01:26:52,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:52,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:26:52,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:52,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:52,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:52,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:52,611 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:26:52,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [944786779] [2021-11-21 01:26:52,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [944786779] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:52,611 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:26:52,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-21 01:26:52,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885906438] [2021-11-21 01:26:52,611 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:52,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:26:52,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:26:52,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:26:52,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:26:52,612 INFO L87 Difference]: Start difference. First operand 1147 states and 1392 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:52,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:52,672 INFO L93 Difference]: Finished difference Result 1135 states and 1372 transitions. [2021-11-21 01:26:52,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:26:52,673 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-21 01:26:52,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:52,679 INFO L225 Difference]: With dead ends: 1135 [2021-11-21 01:26:52,679 INFO L226 Difference]: Without dead ends: 1135 [2021-11-21 01:26:52,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:26:52,680 INFO L933 BasicCegarLoop]: 922 mSDtfsCounter, 904 mSDsluCounter, 927 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 1849 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:52,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [907 Valid, 1849 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:26:52,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2021-11-21 01:26:52,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 1135. [2021-11-21 01:26:52,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 732 states have (on average 1.866120218579235) internal successors, (1366), 1130 states have internal predecessors, (1366), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:26:52,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 1372 transitions. [2021-11-21 01:26:52,720 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 1372 transitions. Word has length 52 [2021-11-21 01:26:52,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:52,720 INFO L470 AbstractCegarLoop]: Abstraction has 1135 states and 1372 transitions. [2021-11-21 01:26:52,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:52,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 1372 transitions. [2021-11-21 01:26:52,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-21 01:26:52,724 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:52,724 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:52,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:52,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:26:52,937 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-21 01:26:52,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:52,938 INFO L85 PathProgramCache]: Analyzing trace with hash -881686959, now seen corresponding path program 1 times [2021-11-21 01:26:52,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:26:52,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [138056255] [2021-11-21 01:26:52,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:52,940 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:26:52,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:26:52,941 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:26:52,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-21 01:26:53,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:53,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:26:53,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:53,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:26:53,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:26:53,923 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 01:26:53,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2021-11-21 01:26:53,942 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:26:53,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 20 [2021-11-21 01:26:53,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:53,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:58,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:58,840 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:26:58,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [138056255] [2021-11-21 01:26:58,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [138056255] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:58,841 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:26:58,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-21 01:26:58,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748630346] [2021-11-21 01:26:58,841 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:58,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:26:58,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:26:58,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:26:58,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-21 01:26:58,843 INFO L87 Difference]: Start difference. First operand 1135 states and 1372 transitions. Second operand has 6 states, 5 states have (on average 23.2) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:27:03,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:27:03,684 INFO L93 Difference]: Finished difference Result 1746 states and 2081 transitions. [2021-11-21 01:27:03,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:27:03,685 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 23.2) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-21 01:27:03,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:27:03,692 INFO L225 Difference]: With dead ends: 1746 [2021-11-21 01:27:03,692 INFO L226 Difference]: Without dead ends: 1746 [2021-11-21 01:27:03,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-21 01:27:03,693 INFO L933 BasicCegarLoop]: 681 mSDtfsCounter, 2212 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 1426 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2216 SdHoareTripleChecker+Valid, 1575 SdHoareTripleChecker+Invalid, 2939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1470 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:27:03,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2216 Valid, 1575 Invalid, 2939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1426 Invalid, 0 Unknown, 1470 Unchecked, 4.8s Time] [2021-11-21 01:27:03,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2021-11-21 01:27:03,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1113. [2021-11-21 01:27:03,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1113 states, 742 states have (on average 1.8221024258760108) internal successors, (1352), 1108 states have internal predecessors, (1352), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:27:03,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 1358 transitions. [2021-11-21 01:27:03,724 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 1358 transitions. Word has length 60 [2021-11-21 01:27:03,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:27:03,725 INFO L470 AbstractCegarLoop]: Abstraction has 1113 states and 1358 transitions. [2021-11-21 01:27:03,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 23.2) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:27:03,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 1358 transitions. [2021-11-21 01:27:03,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-21 01:27:03,726 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:27:03,726 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:27:03,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-21 01:27:03,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:27:03,940 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-21 01:27:03,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:27:03,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1192602638, now seen corresponding path program 1 times [2021-11-21 01:27:03,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:27:03,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [246424831] [2021-11-21 01:27:03,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:27:03,941 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:27:03,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:27:03,942 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:27:03,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-21 01:27:04,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:27:04,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:27:04,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:27:04,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:27:04,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:27:04,435 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 8 treesize of output 6 [2021-11-21 01:27:04,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:27:04,751 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:27:04,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [246424831] [2021-11-21 01:27:04,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [246424831] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:27:04,752 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:27:04,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-21 01:27:04,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724326346] [2021-11-21 01:27:04,752 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:27:04,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:27:04,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:27:04,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:27:04,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:27:04,754 INFO L87 Difference]: Start difference. First operand 1113 states and 1358 transitions. Second operand has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:27:06,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:27:06,475 INFO L93 Difference]: Finished difference Result 1111 states and 1356 transitions. [2021-11-21 01:27:06,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:27:06,476 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-21 01:27:06,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:27:06,481 INFO L225 Difference]: With dead ends: 1111 [2021-11-21 01:27:06,481 INFO L226 Difference]: Without dead ends: 1111 [2021-11-21 01:27:06,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:27:06,481 INFO L933 BasicCegarLoop]: 481 mSDtfsCounter, 1732 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1735 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:27:06,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1735 Valid, 505 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-21 01:27:06,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-11-21 01:27:06,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 1111. [2021-11-21 01:27:06,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1111 states, 742 states have (on average 1.8194070080862534) internal successors, (1350), 1106 states have internal predecessors, (1350), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:27:06,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 1356 transitions. [2021-11-21 01:27:06,503 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 1356 transitions. Word has length 62 [2021-11-21 01:27:06,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:27:06,504 INFO L470 AbstractCegarLoop]: Abstraction has 1111 states and 1356 transitions. [2021-11-21 01:27:06,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:27:06,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 1356 transitions. [2021-11-21 01:27:06,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-21 01:27:06,505 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:27:06,505 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:27:06,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-21 01:27:06,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:27:06,718 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr76REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-21 01:27:06,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:27:06,719 INFO L85 PathProgramCache]: Analyzing trace with hash -855470841, now seen corresponding path program 1 times [2021-11-21 01:27:06,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:27:06,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [377985125] [2021-11-21 01:27:06,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:27:06,720 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:27:06,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:27:06,721 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:27:06,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-21 01:27:06,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:27:06,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:27:06,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:27:06,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:27:07,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-21 01:27:07,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 25 treesize of output 13 [2021-11-21 01:27:07,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:27:07,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:27:07,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:27:07,175 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:27:07,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [377985125] [2021-11-21 01:27:07,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [377985125] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:27:07,175 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:27:07,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-21 01:27:07,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537280705] [2021-11-21 01:27:07,176 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:27:07,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:27:07,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:27:07,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:27:07,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:27:07,176 INFO L87 Difference]: Start difference. First operand 1111 states and 1356 transitions. Second operand has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:27:09,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:27:09,729 INFO L93 Difference]: Finished difference Result 1110 states and 1355 transitions. [2021-11-21 01:27:09,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:27:09,729 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-21 01:27:09,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:27:09,734 INFO L225 Difference]: With dead ends: 1110 [2021-11-21 01:27:09,734 INFO L226 Difference]: Without dead ends: 1110 [2021-11-21 01:27:09,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 122 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:27:09,735 INFO L933 BasicCegarLoop]: 886 mSDtfsCounter, 4 mSDsluCounter, 1371 mSDsCounter, 0 mSdLazyCounter, 1292 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2257 SdHoareTripleChecker+Invalid, 1293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:27:09,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 2257 Invalid, 1293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1292 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-21 01:27:09,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-11-21 01:27:09,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 1110. [2021-11-21 01:27:09,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1110 states, 742 states have (on average 1.8180592991913747) internal successors, (1349), 1105 states have internal predecessors, (1349), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:27:09,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 1355 transitions. [2021-11-21 01:27:09,756 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 1355 transitions. Word has length 65 [2021-11-21 01:27:09,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:27:09,757 INFO L470 AbstractCegarLoop]: Abstraction has 1110 states and 1355 transitions. [2021-11-21 01:27:09,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:27:09,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 1355 transitions. [2021-11-21 01:27:09,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-21 01:27:09,758 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:27:09,758 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:27:09,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-21 01:27:09,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:27:09,980 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr77REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-21 01:27:09,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:27:09,980 INFO L85 PathProgramCache]: Analyzing trace with hash -855470840, now seen corresponding path program 1 times [2021-11-21 01:27:09,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:27:09,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1597072569] [2021-11-21 01:27:09,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:27:09,981 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:27:09,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:27:09,982 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:27:09,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-21 01:27:10,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:27:10,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:27:10,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:27:10,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:27:10,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-21 01:27:10,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 01:27:10,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 39 treesize of output 27 [2021-11-21 01:27:10,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 24 treesize of output 12 [2021-11-21 01:27:10,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:27:10,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:27:10,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:27:10,702 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:27:10,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1597072569] [2021-11-21 01:27:10,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1597072569] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:27:10,702 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:27:10,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-21 01:27:10,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193409446] [2021-11-21 01:27:10,703 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:27:10,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:27:10,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:27:10,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:27:10,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:27:10,704 INFO L87 Difference]: Start difference. First operand 1110 states and 1355 transitions. Second operand has 8 states, 7 states have (on average 10.285714285714286) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:27:18,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:27:18,863 INFO L93 Difference]: Finished difference Result 1109 states and 1354 transitions. [2021-11-21 01:27:18,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:27:18,864 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.285714285714286) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 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 65 [2021-11-21 01:27:18,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:27:18,869 INFO L225 Difference]: With dead ends: 1109 [2021-11-21 01:27:18,869 INFO L226 Difference]: Without dead ends: 1109 [2021-11-21 01:27:18,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:27:18,870 INFO L933 BasicCegarLoop]: 886 mSDtfsCounter, 2 mSDsluCounter, 2327 mSDsCounter, 0 mSdLazyCounter, 2105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3213 SdHoareTripleChecker+Invalid, 2107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:27:18,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3213 Invalid, 2107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2105 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2021-11-21 01:27:18,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2021-11-21 01:27:18,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 1109. [2021-11-21 01:27:18,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1109 states, 741 states have (on average 1.8191632928475034) internal successors, (1348), 1104 states have internal predecessors, (1348), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:27:18,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 1354 transitions. [2021-11-21 01:27:18,892 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 1354 transitions. Word has length 65 [2021-11-21 01:27:18,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:27:18,892 INFO L470 AbstractCegarLoop]: Abstraction has 1109 states and 1354 transitions. [2021-11-21 01:27:18,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.285714285714286) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:27:18,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 1354 transitions. [2021-11-21 01:27:18,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-21 01:27:18,893 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:27:18,894 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:27:18,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-21 01:27:19,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:27:19,113 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-21 01:27:19,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:27:19,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1702947151, now seen corresponding path program 1 times [2021-11-21 01:27:19,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:27:19,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1571998500] [2021-11-21 01:27:19,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:27:19,114 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:27:19,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:27:19,115 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:27:19,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-21 01:27:19,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:27:19,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:27:19,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:27:19,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:27:19,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:27:19,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:27:19,619 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:27:19,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1571998500] [2021-11-21 01:27:19,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1571998500] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:27:19,619 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:27:19,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 01:27:19,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435681215] [2021-11-21 01:27:19,619 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:27:19,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:27:19,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:27:19,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:27:19,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:27:19,621 INFO L87 Difference]: Start difference. First operand 1109 states and 1354 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 01:27:19,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:27:19,703 INFO L93 Difference]: Finished difference Result 1119 states and 1367 transitions. [2021-11-21 01:27:19,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:27:19,711 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 73 [2021-11-21 01:27:19,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:27:19,719 INFO L225 Difference]: With dead ends: 1119 [2021-11-21 01:27:19,719 INFO L226 Difference]: Without dead ends: 1119 [2021-11-21 01:27:19,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:27:19,720 INFO L933 BasicCegarLoop]: 886 mSDtfsCounter, 11 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1773 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:27:19,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1773 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:27:19,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-11-21 01:27:19,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1119. [2021-11-21 01:27:19,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 749 states have (on average 1.8157543391188251) internal successors, (1360), 1113 states have internal predecessors, (1360), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-21 01:27:19,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 1367 transitions. [2021-11-21 01:27:19,746 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 1367 transitions. Word has length 73 [2021-11-21 01:27:19,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:27:19,747 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 1367 transitions. [2021-11-21 01:27:19,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 01:27:19,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 1367 transitions. [2021-11-21 01:27:19,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-21 01:27:19,748 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:27:19,748 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:27:19,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-21 01:27:19,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:27:19,966 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-21 01:27:19,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:27:19,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1510574161, now seen corresponding path program 1 times [2021-11-21 01:27:19,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:27:19,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2056112408] [2021-11-21 01:27:19,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:27:19,967 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:27:19,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:27:19,968 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:27:19,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-21 01:27:20,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:27:20,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:27:20,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:27:20,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:27:20,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:27:20,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:27:20,583 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:27:20,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2056112408] [2021-11-21 01:27:20,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2056112408] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:27:20,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [649363871] [2021-11-21 01:27:20,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:27:20,584 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:27:20,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:27:20,587 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:27:20,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-21 01:27:20,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:27:20,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:27:20,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:27:21,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:27:21,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:27:21,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:27:21,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [649363871] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:27:21,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195244278] [2021-11-21 01:27:21,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:27:21,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:27:21,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:27:21,174 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:27:21,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-21 01:27:21,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:27:21,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:27:21,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:27:21,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:27:21,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:27:21,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:27:21,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195244278] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:27:21,770 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:27:21,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 14 [2021-11-21 01:27:21,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681692459] [2021-11-21 01:27:21,770 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:27:21,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-21 01:27:21,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:27:21,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-21 01:27:21,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:27:21,772 INFO L87 Difference]: Start difference. First operand 1119 states and 1367 transitions. Second operand has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:27:22,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:27:22,246 INFO L93 Difference]: Finished difference Result 1133 states and 1384 transitions. [2021-11-21 01:27:22,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-21 01:27:22,248 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 75 [2021-11-21 01:27:22,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:27:22,254 INFO L225 Difference]: With dead ends: 1133 [2021-11-21 01:27:22,254 INFO L226 Difference]: Without dead ends: 1127 [2021-11-21 01:27:22,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=318, Unknown=0, NotChecked=0, Total=506 [2021-11-21 01:27:22,256 INFO L933 BasicCegarLoop]: 887 mSDtfsCounter, 33 mSDsluCounter, 4412 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 5299 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:27:22,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 5299 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:27:22,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2021-11-21 01:27:22,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 1125. [2021-11-21 01:27:22,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 755 states have (on average 1.8105960264900662) internal successors, (1367), 1119 states have internal predecessors, (1367), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-21 01:27:22,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 1374 transitions. [2021-11-21 01:27:22,298 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 1374 transitions. Word has length 75 [2021-11-21 01:27:22,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:27:22,299 INFO L470 AbstractCegarLoop]: Abstraction has 1125 states and 1374 transitions. [2021-11-21 01:27:22,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:27:22,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 1374 transitions. [2021-11-21 01:27:22,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-21 01:27:22,300 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:27:22,300 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:27:22,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-21 01:27:22,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-21 01:27:22,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-21 01:27:22,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:27:22,914 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-21 01:27:22,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:27:22,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1938377839, now seen corresponding path program 2 times [2021-11-21 01:27:22,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:27:22,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1113343951] [2021-11-21 01:27:22,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:27:22,915 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:27:22,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:27:22,916 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:27:22,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-21 01:27:23,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:27:23,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:27:23,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:27:23,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:27:23,650 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:27:23,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:27:24,119 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:27:24,119 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:27:24,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1113343951] [2021-11-21 01:27:24,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1113343951] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:27:24,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [486332843] [2021-11-21 01:27:24,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:27:24,120 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:27:24,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:27:24,130 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:27:24,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-21 01:27:24,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:27:24,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:27:24,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:27:24,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:27:24,955 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:27:24,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:27:25,217 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:27:25,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [486332843] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:27:25,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634907576] [2021-11-21 01:27:25,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:27:25,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:27:25,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:27:25,219 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:27:25,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-21 01:27:55,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:27:55,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:27:55,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:27:55,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:27:55,337 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:27:55,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:27:55,900 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:27:55,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634907576] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:27:55,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:27:55,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 26 [2021-11-21 01:27:55,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564276640] [2021-11-21 01:27:55,901 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:27:55,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-21 01:27:55,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:27:55,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-21 01:27:55,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-11-21 01:27:55,903 INFO L87 Difference]: Start difference. First operand 1125 states and 1374 transitions. Second operand has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 26 states have internal predecessors, (96), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:27:57,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:27:57,445 INFO L93 Difference]: Finished difference Result 1151 states and 1409 transitions. [2021-11-21 01:27:57,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-21 01:27:57,446 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 26 states have internal predecessors, (96), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 79 [2021-11-21 01:27:57,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:27:57,452 INFO L225 Difference]: With dead ends: 1151 [2021-11-21 01:27:57,452 INFO L226 Difference]: Without dead ends: 1145 [2021-11-21 01:27:57,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=706, Invalid=1364, Unknown=0, NotChecked=0, Total=2070 [2021-11-21 01:27:57,454 INFO L933 BasicCegarLoop]: 890 mSDtfsCounter, 84 mSDsluCounter, 7970 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 8860 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:27:57,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 8860 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:27:57,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-11-21 01:27:57,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 1137. [2021-11-21 01:27:57,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 767 states have (on average 1.801825293350717) internal successors, (1382), 1131 states have internal predecessors, (1382), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-21 01:27:57,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 1389 transitions. [2021-11-21 01:27:57,477 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 1389 transitions. Word has length 79 [2021-11-21 01:27:57,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:27:57,478 INFO L470 AbstractCegarLoop]: Abstraction has 1137 states and 1389 transitions. [2021-11-21 01:27:57,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 26 states have internal predecessors, (96), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:27:57,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 1389 transitions. [2021-11-21 01:27:57,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-21 01:27:57,479 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:27:57,479 INFO L514 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:27:57,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-21 01:27:57,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2021-11-21 01:27:57,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-21 01:27:58,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:27:58,095 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-21 01:27:58,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:27:58,095 INFO L85 PathProgramCache]: Analyzing trace with hash -654977553, now seen corresponding path program 3 times [2021-11-21 01:27:58,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:27:58,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1060885843] [2021-11-21 01:27:58,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:27:58,096 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:27:58,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:27:58,097 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:27:58,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-21 01:27:58,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-21 01:27:58,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:27:58,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 01:27:58,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:27:59,185 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:27:59,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:28:00,679 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:28:00,679 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:28:00,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1060885843] [2021-11-21 01:28:00,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1060885843] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:28:00,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1201409609] [2021-11-21 01:28:00,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:28:00,680 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:28:00,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:28:00,704 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:28:00,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-21 01:28:02,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-21 01:28:02,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:28:02,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 01:28:02,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:28:02,774 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:28:02,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:28:03,193 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:28:03,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1201409609] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:28:03,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919088842] [2021-11-21 01:28:03,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:28:03,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:28:03,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:28:03,206 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:28:03,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2552f7f-b850-42e6-a1ab-9819b902f506/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process