./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test1-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test1-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF --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 1447114af8a4b489e3ec713f117f7a92d9cc93e5175903910b61bfe512c41aed --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:17:14,362 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:17:14,370 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:17:14,401 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:17:14,401 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:17:14,403 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:17:14,404 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:17:14,407 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:17:14,409 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:17:14,410 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:17:14,411 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:17:14,413 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:17:14,413 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:17:14,415 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:17:14,416 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:17:14,418 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:17:14,419 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:17:14,420 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:17:14,422 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:17:14,424 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:17:14,426 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:17:14,427 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:17:14,429 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:17:14,434 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:17:14,438 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:17:14,441 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:17:14,442 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:17:14,443 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:17:14,447 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:17:14,448 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:17:14,450 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:17:14,451 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:17:14,452 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:17:14,454 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:17:14,455 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:17:14,456 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:17:14,457 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:17:14,457 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:17:14,457 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:17:14,458 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:17:14,459 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:17:14,460 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-12 23:17:14,509 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:17:14,509 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:17:14,511 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:17:14,511 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:17:14,511 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:17:14,512 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:17:14,512 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:17:14,512 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:17:14,512 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:17:14,512 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:17:14,513 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:17:14,514 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:17:14,514 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:17:14,514 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:17:14,515 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:17:14,515 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:17:14,516 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-12 23:17:14,516 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-12 23:17:14,516 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:17:14,516 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:17:14,517 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-12 23:17:14,517 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:17:14,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:17:14,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:17:14,517 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-12 23:17:14,518 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-12 23:17:14,519 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-12 23:17:14,520 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:17:14,520 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:17:14,520 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:17:14,520 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:17:14,521 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:17:14,521 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:17:14,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:17:14,521 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:17:14,522 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:17:14,522 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:17:14,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:17:14,522 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:17:14,523 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:17:14,523 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_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1447114af8a4b489e3ec713f117f7a92d9cc93e5175903910b61bfe512c41aed [2021-11-12 23:17:14,771 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:17:14,798 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:17:14,801 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:17:14,802 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:17:14,803 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:17:14,804 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test1-2.i [2021-11-12 23:17:14,867 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/data/539f71a27/2db379a100ea4deaaf46b9c22171acb5/FLAGb1bb746db [2021-11-12 23:17:15,569 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:17:15,570 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test1-2.i [2021-11-12 23:17:15,603 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/data/539f71a27/2db379a100ea4deaaf46b9c22171acb5/FLAGb1bb746db [2021-11-12 23:17:15,886 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/data/539f71a27/2db379a100ea4deaaf46b9c22171acb5 [2021-11-12 23:17:15,890 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:17:15,891 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:17:15,896 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:17:15,897 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:17:15,900 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:17:15,901 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:17:15" (1/1) ... [2021-11-12 23:17:15,903 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2080d4a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:17:15, skipping insertion in model container [2021-11-12 23:17:15,903 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:17:15" (1/1) ... [2021-11-12 23:17:15,911 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:17:15,977 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:17:16,411 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test1-2.i[33021,33034] [2021-11-12 23:17:16,500 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:17:16,510 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) [2021-11-12 23:17:16,510 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1440d669 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:17:16, skipping insertion in model container [2021-11-12 23:17:16,510 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:17:16,511 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:17:16,513 INFO L158 Benchmark]: Toolchain (without parser) took 620.42ms. Allocated memory is still 109.1MB. Free memory was 76.2MB in the beginning and 75.0MB in the end (delta: 1.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-12 23:17:16,516 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 109.1MB. Free memory is still 64.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:17:16,517 INFO L158 Benchmark]: CACSL2BoogieTranslator took 614.72ms. Allocated memory is still 109.1MB. Free memory was 75.9MB in the beginning and 75.0MB in the end (delta: 940.2kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-12 23:17:16,521 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 109.1MB. Free memory is still 64.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 614.72ms. Allocated memory is still 109.1MB. Free memory was 75.9MB in the beginning and 75.0MB in the end (delta: 940.2kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 751]: 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_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test1-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF --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 1447114af8a4b489e3ec713f117f7a92d9cc93e5175903910b61bfe512c41aed --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:17:18,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:17:18,724 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:17:18,754 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:17:18,754 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:17:18,755 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:17:18,757 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:17:18,759 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:17:18,762 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:17:18,763 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:17:18,764 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:17:18,765 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:17:18,766 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:17:18,767 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:17:18,768 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:17:18,770 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:17:18,771 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:17:18,772 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:17:18,774 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:17:18,776 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:17:18,778 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:17:18,779 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:17:18,781 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:17:18,782 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:17:18,785 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:17:18,786 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:17:18,786 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:17:18,787 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:17:18,788 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:17:18,789 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:17:18,789 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:17:18,790 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:17:18,791 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:17:18,792 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:17:18,805 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:17:18,806 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:17:18,807 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:17:18,807 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:17:18,807 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:17:18,808 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:17:18,809 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:17:18,812 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-12 23:17:18,855 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:17:18,857 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:17:18,859 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:17:18,859 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:17:18,859 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:17:18,859 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:17:18,860 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:17:18,860 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:17:18,860 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:17:18,860 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:17:18,862 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-12 23:17:18,863 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-12 23:17:18,863 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:17:18,863 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:17:18,864 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-12 23:17:18,864 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:17:18,864 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:17:18,864 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:17:18,864 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-12 23:17:18,865 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-12 23:17:18,865 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-12 23:17:18,865 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:17:18,865 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:17:18,865 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:17:18,866 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:17:18,866 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:17:18,866 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:17:18,866 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:17:18,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:17:18,867 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:17:18,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:17:18,867 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:17:18,868 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:17:18,868 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:17:18,868 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:17:18,868 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:17:18,869 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:17:18,869 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_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1447114af8a4b489e3ec713f117f7a92d9cc93e5175903910b61bfe512c41aed [2021-11-12 23:17:19,235 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:17:19,257 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:17:19,259 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:17:19,261 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:17:19,261 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:17:19,263 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test1-2.i [2021-11-12 23:17:19,332 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/data/dc52773b3/a5a4fbc0296e43188756d2d64af02c54/FLAG151ead2a0 [2021-11-12 23:17:19,978 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:17:19,979 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test1-2.i [2021-11-12 23:17:19,996 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/data/dc52773b3/a5a4fbc0296e43188756d2d64af02c54/FLAG151ead2a0 [2021-11-12 23:17:20,207 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/data/dc52773b3/a5a4fbc0296e43188756d2d64af02c54 [2021-11-12 23:17:20,209 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:17:20,211 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:17:20,212 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:17:20,212 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:17:20,215 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:17:20,216 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:17:20" (1/1) ... [2021-11-12 23:17:20,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d68795 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:17:20, skipping insertion in model container [2021-11-12 23:17:20,217 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:17:20" (1/1) ... [2021-11-12 23:17:20,224 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:17:20,271 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:17:20,690 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test1-2.i[33021,33034] [2021-11-12 23:17:20,777 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:17:20,789 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:17:20,799 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:17:20,818 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test1-2.i[33021,33034] [2021-11-12 23:17:20,876 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:17:20,896 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:17:20,921 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test1-2.i[33021,33034] [2021-11-12 23:17:20,992 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:17:21,056 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:17:21,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:17:21 WrapperNode [2021-11-12 23:17:21,056 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:17:21,058 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:17:21,058 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:17:21,058 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:17:21,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:17:21" (1/1) ... [2021-11-12 23:17:21,128 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:17:21" (1/1) ... [2021-11-12 23:17:21,192 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:17:21,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:17:21,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:17:21,193 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:17:21,202 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:17:21" (1/1) ... [2021-11-12 23:17:21,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:17:21" (1/1) ... [2021-11-12 23:17:21,209 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:17:21" (1/1) ... [2021-11-12 23:17:21,209 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:17:21" (1/1) ... [2021-11-12 23:17:21,274 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:17:21" (1/1) ... [2021-11-12 23:17:21,287 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:17:21" (1/1) ... [2021-11-12 23:17:21,291 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:17:21" (1/1) ... [2021-11-12 23:17:21,299 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:17:21,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:17:21,301 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:17:21,301 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:17:21,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:17:21" (1/1) ... [2021-11-12 23:17:21,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:17:21,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:17:21,345 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:17:21,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:17:21,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 23:17:21,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 23:17:21,426 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 23:17:21,426 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 23:17:21,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-12 23:17:21,426 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-12 23:17:21,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 23:17:21,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 23:17:21,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:17:21,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 23:17:21,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 23:17:21,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 23:17:21,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:17:21,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:17:21,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:17:21,732 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-12 23:17:25,315 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:17:25,316 INFO L299 CfgBuilder]: Removed 40 assume(true) statements. [2021-11-12 23:17:25,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:17:25 BoogieIcfgContainer [2021-11-12 23:17:25,319 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:17:25,323 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:17:25,324 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:17:25,327 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:17:25,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:17:20" (1/3) ... [2021-11-12 23:17:25,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e8a3d6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:17:25, skipping insertion in model container [2021-11-12 23:17:25,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:17:21" (2/3) ... [2021-11-12 23:17:25,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e8a3d6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:17:25, skipping insertion in model container [2021-11-12 23:17:25,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:17:25" (3/3) ... [2021-11-12 23:17:25,331 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test1-2.i [2021-11-12 23:17:25,337 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:17:25,337 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 435 error locations. [2021-11-12 23:17:25,383 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:17:25,390 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 [2021-11-12 23:17:25,390 INFO L340 AbstractCegarLoop]: Starting to check reachability of 435 error locations. [2021-11-12 23:17:25,429 INFO L276 IsEmpty]: Start isEmpty. Operand has 867 states, 419 states have (on average 2.252983293556086) internal successors, (944), 861 states have internal predecessors, (944), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-12 23:17:25,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-12 23:17:25,435 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:17:25,436 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-12 23:17:25,436 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 431 more)] === [2021-11-12 23:17:25,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:17:25,442 INFO L85 PathProgramCache]: Analyzing trace with hash 37287509, now seen corresponding path program 1 times [2021-11-12 23:17:25,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:17:25,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099770] [2021-11-12 23:17:25,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:25,455 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:17:25,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:17:25,458 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:17:25,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:17:25,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:25,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:17:25,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:25,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:25,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:25,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:25,700 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:17:25,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1099770] [2021-11-12 23:17:25,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1099770] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:17:25,701 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:17:25,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 23:17:25,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975387473] [2021-11-12 23:17:25,704 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:17:25,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:17:25,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:17:25,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:17:25,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:17:25,764 INFO L87 Difference]: Start difference. First operand has 867 states, 419 states have (on average 2.252983293556086) internal successors, (944), 861 states have internal predecessors, (944), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2021-11-12 23:17:25,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:17:25,880 INFO L93 Difference]: Finished difference Result 858 states and 916 transitions. [2021-11-12 23:17:25,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:17:25,882 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 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 5 [2021-11-12 23:17:25,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:17:25,901 INFO L225 Difference]: With dead ends: 858 [2021-11-12 23:17:25,902 INFO L226 Difference]: Without dead ends: 856 [2021-11-12 23:17:25,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:17:25,907 INFO L933 BasicCegarLoop]: 916 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.96ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:17:25,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 9.96ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:17:25,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2021-11-12 23:17:26,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 856. [2021-11-12 23:17:26,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 414 states have (on average 2.1449275362318843) internal successors, (888), 850 states have internal predecessors, (888), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-12 23:17:26,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 914 transitions. [2021-11-12 23:17:26,036 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 914 transitions. Word has length 5 [2021-11-12 23:17:26,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:17:26,036 INFO L470 AbstractCegarLoop]: Abstraction has 856 states and 914 transitions. [2021-11-12 23:17:26,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2021-11-12 23:17:26,037 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 914 transitions. [2021-11-12 23:17:26,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-12 23:17:26,037 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:17:26,037 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-12 23:17:26,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:17:26,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:17:26,249 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 431 more)] === [2021-11-12 23:17:26,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:17:26,250 INFO L85 PathProgramCache]: Analyzing trace with hash 37287571, now seen corresponding path program 1 times [2021-11-12 23:17:26,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:17:26,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1140737147] [2021-11-12 23:17:26,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:26,251 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:17:26,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:17:26,254 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:17:26,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:17:26,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:26,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:17:26,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:26,396 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 [2021-11-12 23:17:26,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:26,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:26,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:26,426 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:17:26,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1140737147] [2021-11-12 23:17:26,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1140737147] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:17:26,427 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:17:26,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 23:17:26,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796644799] [2021-11-12 23:17:26,428 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:17:26,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:17:26,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:17:26,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:17:26,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:17:26,430 INFO L87 Difference]: Start difference. First operand 856 states and 914 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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) [2021-11-12 23:17:28,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:17:28,055 INFO L93 Difference]: Finished difference Result 814 states and 873 transitions. [2021-11-12 23:17:28,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:17:28,055 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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 5 [2021-11-12 23:17:28,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:17:28,060 INFO L225 Difference]: With dead ends: 814 [2021-11-12 23:17:28,060 INFO L226 Difference]: Without dead ends: 814 [2021-11-12 23:17:28,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:17:28,062 INFO L933 BasicCegarLoop]: 544 mSDtfsCounter, 596 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1321.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.10ms SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1578.19ms IncrementalHoareTripleChecker+Time [2021-11-12 23:17:28,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [609 Valid, 662 Invalid, 515 Unknown, 0 Unchecked, 12.10ms Time], IncrementalHoareTripleChecker [54 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 1578.19ms Time] [2021-11-12 23:17:28,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2021-11-12 23:17:28,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 807. [2021-11-12 23:17:28,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 414 states have (on average 2.026570048309179) internal successors, (839), 801 states have internal predecessors, (839), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-12 23:17:28,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 865 transitions. [2021-11-12 23:17:28,086 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 865 transitions. Word has length 5 [2021-11-12 23:17:28,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:17:28,086 INFO L470 AbstractCegarLoop]: Abstraction has 807 states and 865 transitions. [2021-11-12 23:17:28,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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) [2021-11-12 23:17:28,087 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 865 transitions. [2021-11-12 23:17:28,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-12 23:17:28,087 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:17:28,087 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-12 23:17:28,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:17:28,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:17:28,301 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 431 more)] === [2021-11-12 23:17:28,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:17:28,302 INFO L85 PathProgramCache]: Analyzing trace with hash 37287572, now seen corresponding path program 1 times [2021-11-12 23:17:28,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:17:28,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1471847248] [2021-11-12 23:17:28,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:28,303 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:17:28,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:17:28,304 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:17:28,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:17:28,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:28,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:17:28,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:28,416 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 [2021-11-12 23:17:28,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:28,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:28,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:28,529 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:17:28,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1471847248] [2021-11-12 23:17:28,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1471847248] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:17:28,529 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:17:28,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-12 23:17:28,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6300176] [2021-11-12 23:17:28,530 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:17:28,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:17:28,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:17:28,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:17:28,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:17:28,531 INFO L87 Difference]: Start difference. First operand 807 states and 865 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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) [2021-11-12 23:17:31,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:17:31,923 INFO L93 Difference]: Finished difference Result 880 states and 942 transitions. [2021-11-12 23:17:31,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:17:31,924 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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 5 [2021-11-12 23:17:31,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:17:31,929 INFO L225 Difference]: With dead ends: 880 [2021-11-12 23:17:31,929 INFO L226 Difference]: Without dead ends: 880 [2021-11-12 23:17:31,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:17:31,931 INFO L933 BasicCegarLoop]: 705 mSDtfsCounter, 323 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2940.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.34ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3339.74ms IncrementalHoareTripleChecker+Time [2021-11-12 23:17:31,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 1276 Invalid, 876 Unknown, 0 Unchecked, 12.34ms Time], IncrementalHoareTripleChecker [15 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 3339.74ms Time] [2021-11-12 23:17:31,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2021-11-12 23:17:31,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 829. [2021-11-12 23:17:31,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 446 states have (on average 2.006726457399103) internal successors, (895), 823 states have internal predecessors, (895), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-12 23:17:31,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 921 transitions. [2021-11-12 23:17:31,975 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 921 transitions. Word has length 5 [2021-11-12 23:17:31,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:17:31,975 INFO L470 AbstractCegarLoop]: Abstraction has 829 states and 921 transitions. [2021-11-12 23:17:31,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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) [2021-11-12 23:17:31,976 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 921 transitions. [2021-11-12 23:17:31,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-12 23:17:31,976 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:17:31,976 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-12 23:17:31,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:17:32,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:17:32,177 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr322REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 431 more)] === [2021-11-12 23:17:32,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:17:32,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1156735106, now seen corresponding path program 1 times [2021-11-12 23:17:32,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:17:32,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [385793660] [2021-11-12 23:17:32,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:32,179 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:17:32,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:17:32,180 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:17:32,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:17:32,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:32,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:17:32,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:32,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:32,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:32,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:32,322 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:17:32,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [385793660] [2021-11-12 23:17:32,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [385793660] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:17:32,323 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:17:32,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:17:32,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144108560] [2021-11-12 23:17:32,324 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:17:32,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:17:32,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:17:32,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:17:32,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:17:32,325 INFO L87 Difference]: Start difference. First operand 829 states and 921 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-11-12 23:17:32,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:17:32,449 INFO L93 Difference]: Finished difference Result 1411 states and 1564 transitions. [2021-11-12 23:17:32,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:17:32,450 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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 6 [2021-11-12 23:17:32,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:17:32,458 INFO L225 Difference]: With dead ends: 1411 [2021-11-12 23:17:32,458 INFO L226 Difference]: Without dead ends: 1411 [2021-11-12 23:17:32,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:17:32,460 INFO L933 BasicCegarLoop]: 1076 mSDtfsCounter, 1485 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 72.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1491 SdHoareTripleChecker+Valid, 1922 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.19ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 86.14ms IncrementalHoareTripleChecker+Time [2021-11-12 23:17:32,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1491 Valid, 1922 Invalid, 18 Unknown, 0 Unchecked, 7.19ms Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 86.14ms Time] [2021-11-12 23:17:32,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2021-11-12 23:17:32,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 1151. [2021-11-12 23:17:32,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 768 states have (on average 1.9947916666666667) internal successors, (1532), 1142 states have internal predecessors, (1532), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 23:17:32,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 1564 transitions. [2021-11-12 23:17:32,501 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 1564 transitions. Word has length 6 [2021-11-12 23:17:32,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:17:32,501 INFO L470 AbstractCegarLoop]: Abstraction has 1151 states and 1564 transitions. [2021-11-12 23:17:32,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-11-12 23:17:32,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 1564 transitions. [2021-11-12 23:17:32,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-12 23:17:32,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:17:32,503 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:17:32,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:17:32,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:17:32,713 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 431 more)] === [2021-11-12 23:17:32,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:17:32,714 INFO L85 PathProgramCache]: Analyzing trace with hash 334651453, now seen corresponding path program 1 times [2021-11-12 23:17:32,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:17:32,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2006996850] [2021-11-12 23:17:32,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:32,714 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:17:32,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:17:32,716 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:17:32,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:17:32,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:32,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:17:32,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:32,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:32,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:32,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:32,894 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:17:32,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2006996850] [2021-11-12 23:17:32,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2006996850] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:17:32,895 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:17:32,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:17:32,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964972506] [2021-11-12 23:17:32,896 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:17:32,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:17:32,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:17:32,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:17:32,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:17:32,897 INFO L87 Difference]: Start difference. First operand 1151 states and 1564 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:32,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:17:32,964 INFO L93 Difference]: Finished difference Result 1091 states and 1478 transitions. [2021-11-12 23:17:32,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:17:32,965 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 [2021-11-12 23:17:32,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:17:32,972 INFO L225 Difference]: With dead ends: 1091 [2021-11-12 23:17:32,973 INFO L226 Difference]: Without dead ends: 1091 [2021-11-12 23:17:32,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:17:32,974 INFO L933 BasicCegarLoop]: 807 mSDtfsCounter, 1546 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1559 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.61ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.59ms IncrementalHoareTripleChecker+Time [2021-11-12 23:17:32,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1559 Valid, 837 Invalid, 26 Unknown, 0 Unchecked, 4.61ms Time], IncrementalHoareTripleChecker [13 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 43.59ms Time] [2021-11-12 23:17:32,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2021-11-12 23:17:32,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 1091. [2021-11-12 23:17:33,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1091 states, 732 states have (on average 1.9754098360655739) internal successors, (1446), 1082 states have internal predecessors, (1446), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 23:17:33,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 1478 transitions. [2021-11-12 23:17:33,008 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 1478 transitions. Word has length 11 [2021-11-12 23:17:33,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:17:33,008 INFO L470 AbstractCegarLoop]: Abstraction has 1091 states and 1478 transitions. [2021-11-12 23:17:33,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:33,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 1478 transitions. [2021-11-12 23:17:33,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-12 23:17:33,009 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:17:33,009 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:17:33,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:17:33,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:17:33,220 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 431 more)] === [2021-11-12 23:17:33,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:17:33,221 INFO L85 PathProgramCache]: Analyzing trace with hash -522505033, now seen corresponding path program 1 times [2021-11-12 23:17:33,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:17:33,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1518186846] [2021-11-12 23:17:33,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:33,222 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:17:33,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:17:33,223 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:17:33,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:17:33,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:33,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:17:33,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:33,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:33,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:33,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:33,423 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:17:33,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1518186846] [2021-11-12 23:17:33,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1518186846] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:17:33,423 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:17:33,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 23:17:33,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605609276] [2021-11-12 23:17:33,424 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:17:33,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:17:33,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:17:33,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:17:33,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:17:33,425 INFO L87 Difference]: Start difference. First operand 1091 states and 1478 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:33,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:17:33,541 INFO L93 Difference]: Finished difference Result 1063 states and 1422 transitions. [2021-11-12 23:17:33,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:17:33,542 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 13 [2021-11-12 23:17:33,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:17:33,548 INFO L225 Difference]: With dead ends: 1063 [2021-11-12 23:17:33,549 INFO L226 Difference]: Without dead ends: 1063 [2021-11-12 23:17:33,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:17:33,550 INFO L933 BasicCegarLoop]: 762 mSDtfsCounter, 1478 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 68.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1491 SdHoareTripleChecker+Valid, 1547 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.83ms SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 81.60ms IncrementalHoareTripleChecker+Time [2021-11-12 23:17:33,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1491 Valid, 1547 Invalid, 89 Unknown, 0 Unchecked, 5.83ms Time], IncrementalHoareTripleChecker [55 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 81.60ms Time] [2021-11-12 23:17:33,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2021-11-12 23:17:33,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 1061. [2021-11-12 23:17:33,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 716 states have (on average 1.9385474860335195) internal successors, (1388), 1052 states have internal predecessors, (1388), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 23:17:33,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1420 transitions. [2021-11-12 23:17:33,580 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1420 transitions. Word has length 13 [2021-11-12 23:17:33,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:17:33,580 INFO L470 AbstractCegarLoop]: Abstraction has 1061 states and 1420 transitions. [2021-11-12 23:17:33,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:33,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1420 transitions. [2021-11-12 23:17:33,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-12 23:17:33,581 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:17:33,581 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] [2021-11-12 23:17:33,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:17:33,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:17:33,798 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr42REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 431 more)] === [2021-11-12 23:17:33,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:17:33,799 INFO L85 PathProgramCache]: Analyzing trace with hash -22216187, now seen corresponding path program 1 times [2021-11-12 23:17:33,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:17:33,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [699500254] [2021-11-12 23:17:33,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:33,799 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:17:33,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:17:33,800 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:17:33,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:17:33,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:33,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:17:33,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:33,933 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 [2021-11-12 23:17:34,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:34,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:34,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:34,142 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:17:34,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [699500254] [2021-11-12 23:17:34,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [699500254] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:17:34,142 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:17:34,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:17:34,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525884854] [2021-11-12 23:17:34,143 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:17:34,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:17:34,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:17:34,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:17:34,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:17:34,144 INFO L87 Difference]: Start difference. First operand 1061 states and 1420 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:36,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:17:36,124 INFO L93 Difference]: Finished difference Result 1294 states and 1680 transitions. [2021-11-12 23:17:36,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:17:36,125 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-12 23:17:36,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:17:36,133 INFO L225 Difference]: With dead ends: 1294 [2021-11-12 23:17:36,133 INFO L226 Difference]: Without dead ends: 1294 [2021-11-12 23:17:36,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:17:36,134 INFO L933 BasicCegarLoop]: 418 mSDtfsCounter, 1151 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1663.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1161 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.19ms SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1921.92ms IncrementalHoareTripleChecker+Time [2021-11-12 23:17:36,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1161 Valid, 718 Invalid, 744 Unknown, 0 Unchecked, 9.19ms Time], IncrementalHoareTripleChecker [41 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 1921.92ms Time] [2021-11-12 23:17:36,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2021-11-12 23:17:36,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 1057. [2021-11-12 23:17:36,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 716 states have (on average 1.9273743016759777) internal successors, (1380), 1048 states have internal predecessors, (1380), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 23:17:36,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 1412 transitions. [2021-11-12 23:17:36,182 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 1412 transitions. Word has length 27 [2021-11-12 23:17:36,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:17:36,182 INFO L470 AbstractCegarLoop]: Abstraction has 1057 states and 1412 transitions. [2021-11-12 23:17:36,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:36,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 1412 transitions. [2021-11-12 23:17:36,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-12 23:17:36,184 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:17:36,184 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] [2021-11-12 23:17:36,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:17:36,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:17:36,396 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr43REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 431 more)] === [2021-11-12 23:17:36,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:17:36,397 INFO L85 PathProgramCache]: Analyzing trace with hash -22216186, now seen corresponding path program 1 times [2021-11-12 23:17:36,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:17:36,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1488075297] [2021-11-12 23:17:36,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:36,397 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:17:36,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:17:36,398 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:17:36,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:17:36,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:36,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:17:36,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:36,530 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 [2021-11-12 23:17:36,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:36,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:37,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:37,159 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:17:37,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1488075297] [2021-11-12 23:17:37,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1488075297] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:17:37,160 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:17:37,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-12 23:17:37,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375068058] [2021-11-12 23:17:37,160 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:17:37,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:17:37,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:17:37,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:17:37,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:17:37,161 INFO L87 Difference]: Start difference. First operand 1057 states and 1412 transitions. Second operand has 6 states, 5 states have (on average 10.4) internal successors, (52), 6 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) [2021-11-12 23:17:43,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:17:43,180 INFO L93 Difference]: Finished difference Result 1357 states and 1715 transitions. [2021-11-12 23:17:43,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:17:43,181 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 6 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 27 [2021-11-12 23:17:43,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:17:43,188 INFO L225 Difference]: With dead ends: 1357 [2021-11-12 23:17:43,188 INFO L226 Difference]: Without dead ends: 1357 [2021-11-12 23:17:43,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:17:43,189 INFO L933 BasicCegarLoop]: 573 mSDtfsCounter, 699 mSDsluCounter, 1205 mSDsCounter, 0 mSdLazyCounter, 1622 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5226.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 1778 SdHoareTripleChecker+Invalid, 1654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.16ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5832.59ms IncrementalHoareTripleChecker+Time [2021-11-12 23:17:43,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [709 Valid, 1778 Invalid, 1654 Unknown, 0 Unchecked, 12.16ms Time], IncrementalHoareTripleChecker [32 Valid, 1622 Invalid, 0 Unknown, 0 Unchecked, 5832.59ms Time] [2021-11-12 23:17:43,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2021-11-12 23:17:43,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 1053. [2021-11-12 23:17:43,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 716 states have (on average 1.9162011173184357) internal successors, (1372), 1044 states have internal predecessors, (1372), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 23:17:43,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 1404 transitions. [2021-11-12 23:17:43,221 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 1404 transitions. Word has length 27 [2021-11-12 23:17:43,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:17:43,222 INFO L470 AbstractCegarLoop]: Abstraction has 1053 states and 1404 transitions. [2021-11-12 23:17:43,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 6 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) [2021-11-12 23:17:43,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 1404 transitions. [2021-11-12 23:17:43,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-12 23:17:43,224 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:17:43,224 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] [2021-11-12 23:17:43,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:17:43,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:17:43,436 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr108REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 431 more)] === [2021-11-12 23:17:43,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:17:43,437 INFO L85 PathProgramCache]: Analyzing trace with hash 810363537, now seen corresponding path program 1 times [2021-11-12 23:17:43,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:17:43,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [875792464] [2021-11-12 23:17:43,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:43,438 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:17:43,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:17:43,439 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:17:43,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:17:43,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:43,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:17:43,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:43,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:43,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:43,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:43,821 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:17:43,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [875792464] [2021-11-12 23:17:43,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [875792464] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:17:43,821 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:17:43,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-12 23:17:43,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062662291] [2021-11-12 23:17:43,822 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:17:43,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:17:43,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:17:43,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:17:43,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:17:43,823 INFO L87 Difference]: Start difference. First operand 1053 states and 1404 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:43,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:17:43,877 INFO L93 Difference]: Finished difference Result 1041 states and 1384 transitions. [2021-11-12 23:17:43,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:17:43,877 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-12 23:17:43,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:17:43,883 INFO L225 Difference]: With dead ends: 1041 [2021-11-12 23:17:43,883 INFO L226 Difference]: Without dead ends: 1041 [2021-11-12 23:17:43,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:17:43,884 INFO L933 BasicCegarLoop]: 756 mSDtfsCounter, 720 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 733 SdHoareTripleChecker+Valid, 1525 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.48ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.97ms IncrementalHoareTripleChecker+Time [2021-11-12 23:17:43,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [733 Valid, 1525 Invalid, 43 Unknown, 0 Unchecked, 2.48ms Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 35.97ms Time] [2021-11-12 23:17:43,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2021-11-12 23:17:43,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 1041. [2021-11-12 23:17:43,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1041 states, 704 states have (on average 1.9204545454545454) internal successors, (1352), 1032 states have internal predecessors, (1352), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 23:17:43,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1041 states to 1041 states and 1384 transitions. [2021-11-12 23:17:43,910 INFO L78 Accepts]: Start accepts. Automaton has 1041 states and 1384 transitions. Word has length 42 [2021-11-12 23:17:43,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:17:43,910 INFO L470 AbstractCegarLoop]: Abstraction has 1041 states and 1384 transitions. [2021-11-12 23:17:43,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:43,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1041 states and 1384 transitions. [2021-11-12 23:17:43,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-12 23:17:43,912 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:17:43,912 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] [2021-11-12 23:17:43,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:17:44,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:17:44,124 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr108REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 431 more)] === [2021-11-12 23:17:44,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:17:44,124 INFO L85 PathProgramCache]: Analyzing trace with hash 2087041861, now seen corresponding path program 1 times [2021-11-12 23:17:44,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:17:44,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1444287064] [2021-11-12 23:17:44,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:44,126 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:17:44,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:17:44,127 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:17:44,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:17:44,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:44,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:17:44,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:44,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:44,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:44,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:44,989 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:17:44,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1444287064] [2021-11-12 23:17:44,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1444287064] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:17:44,989 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:17:44,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:17:44,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301879806] [2021-11-12 23:17:44,990 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:17:44,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:17:44,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:17:44,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:17:44,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:17:44,991 INFO L87 Difference]: Start difference. First operand 1041 states and 1384 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:45,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:17:45,207 INFO L93 Difference]: Finished difference Result 1186 states and 1483 transitions. [2021-11-12 23:17:45,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:17:45,208 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-12 23:17:45,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:17:45,214 INFO L225 Difference]: With dead ends: 1186 [2021-11-12 23:17:45,214 INFO L226 Difference]: Without dead ends: 1186 [2021-11-12 23:17:45,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:17:45,216 INFO L933 BasicCegarLoop]: 835 mSDtfsCounter, 269 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 168.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 1465 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.95ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 205.06ms IncrementalHoareTripleChecker+Time [2021-11-12 23:17:45,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 1465 Invalid, 98 Unknown, 0 Unchecked, 1.95ms Time], IncrementalHoareTripleChecker [4 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 205.06ms Time] [2021-11-12 23:17:45,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2021-11-12 23:17:45,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 991. [2021-11-12 23:17:45,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 654 states have (on average 1.9067278287461773) internal successors, (1247), 982 states have internal predecessors, (1247), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 23:17:45,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1279 transitions. [2021-11-12 23:17:45,240 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 1279 transitions. Word has length 50 [2021-11-12 23:17:45,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:17:45,240 INFO L470 AbstractCegarLoop]: Abstraction has 991 states and 1279 transitions. [2021-11-12 23:17:45,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:45,241 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 1279 transitions. [2021-11-12 23:17:45,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-12 23:17:45,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:17:45,242 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] [2021-11-12 23:17:45,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:17:45,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:17:45,454 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 431 more)] === [2021-11-12 23:17:45,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:17:45,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1009990608, now seen corresponding path program 1 times [2021-11-12 23:17:45,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:17:45,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [754253806] [2021-11-12 23:17:45,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:45,456 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:17:45,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:17:45,457 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:17:45,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:17:45,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:45,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:17:45,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:45,731 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 [2021-11-12 23:17:45,739 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 [2021-11-12 23:17:46,334 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-12 23:17:46,335 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 [2021-11-12 23:17:46,341 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-12 23:17:46,342 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 [2021-11-12 23:17:46,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:46,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:53,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:53,080 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:17:53,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [754253806] [2021-11-12 23:17:53,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [754253806] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:17:53,080 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:17:53,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-12 23:17:53,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718853282] [2021-11-12 23:17:53,081 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:17:53,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:17:53,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:17:53,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:17:53,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-12 23:17:53,082 INFO L87 Difference]: Start difference. First operand 991 states and 1279 transitions. Second operand has 6 states, 5 states have (on average 20.8) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:56,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:17:56,005 INFO L93 Difference]: Finished difference Result 1193 states and 1457 transitions. [2021-11-12 23:17:56,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:17:56,006 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 20.8) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-12 23:17:56,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:17:56,013 INFO L225 Difference]: With dead ends: 1193 [2021-11-12 23:17:56,013 INFO L226 Difference]: Without dead ends: 1193 [2021-11-12 23:17:56,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2021-11-12 23:17:56,014 INFO L933 BasicCegarLoop]: 635 mSDtfsCounter, 313 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2410.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 1737 SdHoareTripleChecker+Invalid, 1396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.68ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 664 IncrementalHoareTripleChecker+Unchecked, 2846.46ms IncrementalHoareTripleChecker+Time [2021-11-12 23:17:56,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 1737 Invalid, 1396 Unknown, 0 Unchecked, 10.68ms Time], IncrementalHoareTripleChecker [18 Valid, 714 Invalid, 0 Unknown, 664 Unchecked, 2846.46ms Time] [2021-11-12 23:17:56,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2021-11-12 23:17:56,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 1071. [2021-11-12 23:17:56,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1071 states, 735 states have (on average 1.9129251700680272) internal successors, (1406), 1061 states have internal predecessors, (1406), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 8 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-12 23:17:56,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 1440 transitions. [2021-11-12 23:17:56,041 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 1440 transitions. Word has length 53 [2021-11-12 23:17:56,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:17:56,042 INFO L470 AbstractCegarLoop]: Abstraction has 1071 states and 1440 transitions. [2021-11-12 23:17:56,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 20.8) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:56,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 1440 transitions. [2021-11-12 23:17:56,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-12 23:17:56,043 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:17:56,044 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] [2021-11-12 23:17:56,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:17:56,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:17:56,257 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr63REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 431 more)] === [2021-11-12 23:17:56,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:17:56,257 INFO L85 PathProgramCache]: Analyzing trace with hash -61627503, now seen corresponding path program 1 times [2021-11-12 23:17:56,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:17:56,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2040109671] [2021-11-12 23:17:56,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:56,258 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:17:56,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:17:56,260 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:17:56,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:17:56,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:56,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:17:56,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:56,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:56,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:56,779 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 [2021-11-12 23:17:57,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:57,097 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:17:57,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2040109671] [2021-11-12 23:17:57,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2040109671] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:17:57,098 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:17:57,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-12 23:17:57,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573693828] [2021-11-12 23:17:57,098 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:17:57,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:17:57,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:17:57,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:17:57,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:17:57,099 INFO L87 Difference]: Start difference. First operand 1071 states and 1440 transitions. Second operand has 6 states, 5 states have (on average 21.6) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:58,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:17:58,566 INFO L93 Difference]: Finished difference Result 1038 states and 1374 transitions. [2021-11-12 23:17:58,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:17:58,567 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 21.6) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-12 23:17:58,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:17:58,572 INFO L225 Difference]: With dead ends: 1038 [2021-11-12 23:17:58,572 INFO L226 Difference]: Without dead ends: 1038 [2021-11-12 23:17:58,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:17:58,573 INFO L933 BasicCegarLoop]: 504 mSDtfsCounter, 1650 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1223.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1653 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.81ms SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1437.83ms IncrementalHoareTripleChecker+Time [2021-11-12 23:17:58,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1653 Valid, 768 Invalid, 323 Unknown, 0 Unchecked, 5.81ms Time], IncrementalHoareTripleChecker [63 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1437.83ms Time] [2021-11-12 23:17:58,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2021-11-12 23:17:58,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 970. [2021-11-12 23:17:58,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 970 states, 667 states have (on average 1.8035982008995501) internal successors, (1203), 961 states have internal predecessors, (1203), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 23:17:58,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1235 transitions. [2021-11-12 23:17:58,597 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1235 transitions. Word has length 55 [2021-11-12 23:17:58,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:17:58,597 INFO L470 AbstractCegarLoop]: Abstraction has 970 states and 1235 transitions. [2021-11-12 23:17:58,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 21.6) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:17:58,598 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1235 transitions. [2021-11-12 23:17:58,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-12 23:17:58,599 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:17:58,599 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] [2021-11-12 23:17:58,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:17:58,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:17:58,811 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr66REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 431 more)] === [2021-11-12 23:17:58,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:17:58,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1993678057, now seen corresponding path program 1 times [2021-11-12 23:17:58,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:17:58,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1236349706] [2021-11-12 23:17:58,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:17:58,812 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:17:58,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:17:58,813 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:17:58,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:17:58,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:17:59,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:17:59,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:17:59,078 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 [2021-11-12 23:17:59,090 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 [2021-11-12 23:17:59,121 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 [2021-11-12 23:17:59,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:59,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:17:59,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:17:59,258 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:17:59,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1236349706] [2021-11-12 23:17:59,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1236349706] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:17:59,258 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:17:59,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-12 23:17:59,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940733104] [2021-11-12 23:17:59,258 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:17:59,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:17:59,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:17:59,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:17:59,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:17:59,259 INFO L87 Difference]: Start difference. First operand 970 states and 1235 transitions. Second operand has 5 states, 4 states have (on average 14.5) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:01,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:18:01,772 INFO L93 Difference]: Finished difference Result 969 states and 1233 transitions. [2021-11-12 23:18:01,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:18:01,773 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.5) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-12 23:18:01,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:18:01,777 INFO L225 Difference]: With dead ends: 969 [2021-11-12 23:18:01,777 INFO L226 Difference]: Without dead ends: 969 [2021-11-12 23:18:01,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 108 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:18:01,778 INFO L933 BasicCegarLoop]: 726 mSDtfsCounter, 4 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2133.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1862 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.14ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2456.03ms IncrementalHoareTripleChecker+Time [2021-11-12 23:18:01,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 1862 Invalid, 1048 Unknown, 0 Unchecked, 7.14ms Time], IncrementalHoareTripleChecker [1 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 2456.03ms Time] [2021-11-12 23:18:01,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2021-11-12 23:18:01,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 969. [2021-11-12 23:18:01,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 667 states have (on average 1.800599700149925) internal successors, (1201), 960 states have internal predecessors, (1201), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 23:18:01,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1233 transitions. [2021-11-12 23:18:01,799 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1233 transitions. Word has length 58 [2021-11-12 23:18:01,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:18:01,800 INFO L470 AbstractCegarLoop]: Abstraction has 969 states and 1233 transitions. [2021-11-12 23:18:01,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.5) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:18:01,800 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1233 transitions. [2021-11-12 23:18:01,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-12 23:18:01,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:18:01,801 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] [2021-11-12 23:18:01,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:18:02,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:18:02,013 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr67REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 431 more)] === [2021-11-12 23:18:02,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:18:02,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1993678056, now seen corresponding path program 1 times [2021-11-12 23:18:02,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:18:02,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2021017422] [2021-11-12 23:18:02,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:18:02,015 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:18:02,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:18:02,016 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:18:02,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:18:02,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:02,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:18:02,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:02,298 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 [2021-11-12 23:18:02,336 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 [2021-11-12 23:18:02,346 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 [2021-11-12 23:18:02,401 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 [2021-11-12 23:18:02,404 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 [2021-11-12 23:18:02,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:02,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:02,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:02,707 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:18:02,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2021017422] [2021-11-12 23:18:02,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2021017422] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:18:02,707 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:18:02,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-12 23:18:02,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134041859] [2021-11-12 23:18:02,708 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:18:02,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:18:02,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:18:02,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:18:02,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:18:02,709 INFO L87 Difference]: Start difference. First operand 969 states and 1233 transitions. Second operand has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 8 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) [2021-11-12 23:18:09,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:18:09,696 INFO L93 Difference]: Finished difference Result 968 states and 1231 transitions. [2021-11-12 23:18:09,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:18:09,698 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 8 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 58 [2021-11-12 23:18:09,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:18:09,702 INFO L225 Difference]: With dead ends: 968 [2021-11-12 23:18:09,703 INFO L226 Difference]: Without dead ends: 968 [2021-11-12 23:18:09,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:18:09,703 INFO L933 BasicCegarLoop]: 726 mSDtfsCounter, 3 mSDsluCounter, 1916 mSDsCounter, 0 mSdLazyCounter, 1716 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6184.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2642 SdHoareTripleChecker+Invalid, 1717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.52ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6892.30ms IncrementalHoareTripleChecker+Time [2021-11-12 23:18:09,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 2642 Invalid, 1717 Unknown, 0 Unchecked, 11.52ms Time], IncrementalHoareTripleChecker [1 Valid, 1716 Invalid, 0 Unknown, 0 Unchecked, 6892.30ms Time] [2021-11-12 23:18:09,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2021-11-12 23:18:09,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 968. [2021-11-12 23:18:09,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 665 states have (on average 1.8030075187969925) internal successors, (1199), 959 states have internal predecessors, (1199), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-12 23:18:09,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1231 transitions. [2021-11-12 23:18:09,734 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1231 transitions. Word has length 58 [2021-11-12 23:18:09,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:18:09,734 INFO L470 AbstractCegarLoop]: Abstraction has 968 states and 1231 transitions. [2021-11-12 23:18:09,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 8 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) [2021-11-12 23:18:09,735 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1231 transitions. [2021-11-12 23:18:09,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-12 23:18:09,736 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:18:09,736 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] [2021-11-12 23:18:09,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-12 23:18:09,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:18:09,949 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 431 more)] === [2021-11-12 23:18:09,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:18:09,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1238792034, now seen corresponding path program 1 times [2021-11-12 23:18:09,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:18:09,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [95866133] [2021-11-12 23:18:09,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:18:09,950 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:18:09,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:18:09,951 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:18:09,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:18:10,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:10,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:18:10,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:10,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:10,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:10,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:10,439 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:18:10,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [95866133] [2021-11-12 23:18:10,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [95866133] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:18:10,439 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:18:10,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:18:10,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486417242] [2021-11-12 23:18:10,439 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:18:10,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:18:10,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:18:10,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:18:10,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:18:10,441 INFO L87 Difference]: Start difference. First operand 968 states and 1231 transitions. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 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) [2021-11-12 23:18:10,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:18:10,540 INFO L93 Difference]: Finished difference Result 978 states and 1245 transitions. [2021-11-12 23:18:10,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:18:10,541 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 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 66 [2021-11-12 23:18:10,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:18:10,547 INFO L225 Difference]: With dead ends: 978 [2021-11-12 23:18:10,547 INFO L226 Difference]: Without dead ends: 978 [2021-11-12 23:18:10,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:18:10,548 INFO L933 BasicCegarLoop]: 726 mSDtfsCounter, 7 mSDsluCounter, 2167 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 2893 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.70ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 68.87ms IncrementalHoareTripleChecker+Time [2021-11-12 23:18:10,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 2893 Invalid, 37 Unknown, 0 Unchecked, 2.70ms Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 68.87ms Time] [2021-11-12 23:18:10,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2021-11-12 23:18:10,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 978. [2021-11-12 23:18:10,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 673 states have (on average 1.799405646359584) internal successors, (1211), 968 states have internal predecessors, (1211), 16 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (18), 7 states have call predecessors, (18), 16 states have call successors, (18) [2021-11-12 23:18:10,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1245 transitions. [2021-11-12 23:18:10,574 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1245 transitions. Word has length 66 [2021-11-12 23:18:10,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:18:10,574 INFO L470 AbstractCegarLoop]: Abstraction has 978 states and 1245 transitions. [2021-11-12 23:18:10,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 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) [2021-11-12 23:18:10,575 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1245 transitions. [2021-11-12 23:18:10,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-12 23:18:10,575 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:18:10,575 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] [2021-11-12 23:18:10,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:18:10,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:18:10,788 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 431 more)] === [2021-11-12 23:18:10,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:18:10,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1483591170, now seen corresponding path program 1 times [2021-11-12 23:18:10,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:18:10,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1436836629] [2021-11-12 23:18:10,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:18:10,789 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:18:10,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:18:10,791 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:18:10,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:18:11,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:11,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:18:11,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:11,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:11,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:11,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:11,444 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:18:11,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1436836629] [2021-11-12 23:18:11,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1436836629] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:18:11,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1815968212] [2021-11-12 23:18:11,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:18:11,445 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:18:11,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:18:11,450 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:18:11,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-12 23:18:11,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:11,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:18:11,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:11,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:11,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:12,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:12,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1815968212] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:18:12,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963751476] [2021-11-12 23:18:12,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:18:12,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:18:12,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:18:12,013 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:18:12,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-12 23:18:12,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:18:12,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:18:12,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:12,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:12,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:12,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:12,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963751476] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:18:12,592 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:18:12,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 14 [2021-11-12 23:18:12,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167639497] [2021-11-12 23:18:12,593 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:18:12,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:18:12,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:18:12,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:18:12,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:18:12,594 INFO L87 Difference]: Start difference. First operand 978 states and 1245 transitions. Second operand has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 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) [2021-11-12 23:18:13,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:18:13,155 INFO L93 Difference]: Finished difference Result 992 states and 1263 transitions. [2021-11-12 23:18:13,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 23:18:13,156 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 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 68 [2021-11-12 23:18:13,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:18:13,160 INFO L225 Difference]: With dead ends: 992 [2021-11-12 23:18:13,160 INFO L226 Difference]: Without dead ends: 986 [2021-11-12 23:18:13,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=318, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:18:13,161 INFO L933 BasicCegarLoop]: 727 mSDtfsCounter, 36 mSDsluCounter, 3611 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 213.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 4338 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.36ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 244.98ms IncrementalHoareTripleChecker+Time [2021-11-12 23:18:13,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 4338 Invalid, 132 Unknown, 0 Unchecked, 4.36ms Time], IncrementalHoareTripleChecker [26 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 244.98ms Time] [2021-11-12 23:18:13,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2021-11-12 23:18:13,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 984. [2021-11-12 23:18:13,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 679 states have (on average 1.7938144329896908) internal successors, (1218), 974 states have internal predecessors, (1218), 16 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (18), 7 states have call predecessors, (18), 16 states have call successors, (18) [2021-11-12 23:18:13,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1252 transitions. [2021-11-12 23:18:13,192 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1252 transitions. Word has length 68 [2021-11-12 23:18:13,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:18:13,192 INFO L470 AbstractCegarLoop]: Abstraction has 984 states and 1252 transitions. [2021-11-12 23:18:13,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 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) [2021-11-12 23:18:13,192 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1252 transitions. [2021-11-12 23:18:13,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-12 23:18:13,193 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:18:13,193 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] [2021-11-12 23:18:13,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:18:13,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:18:13,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:18:13,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:18:13,807 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 431 more)] === [2021-11-12 23:18:13,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:18:13,808 INFO L85 PathProgramCache]: Analyzing trace with hash 833289406, now seen corresponding path program 2 times [2021-11-12 23:18:13,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:18:13,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2042846587] [2021-11-12 23:18:13,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:18:13,809 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:18:13,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:18:13,809 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:18:13,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:18:14,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:18:14,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:18:14,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 23:18:14,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:14,318 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:14,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:14,928 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:14,928 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:18:14,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2042846587] [2021-11-12 23:18:14,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2042846587] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:18:14,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [639970792] [2021-11-12 23:18:14,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:18:14,929 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:18:14,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:18:14,934 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:18:14,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-12 23:18:15,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:18:15,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:18:15,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 23:18:15,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:16,003 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:16,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:16,331 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:16,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [639970792] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:18:16,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162382774] [2021-11-12 23:18:16,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:18:16,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:18:16,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:18:16,333 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:18:16,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-12 23:18:22,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:18:22,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:18:22,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:18:22,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:22,207 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:22,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:22,495 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:22,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162382774] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:18:22,496 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:18:22,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 19 [2021-11-12 23:18:22,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333909125] [2021-11-12 23:18:22,498 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:18:22,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-12 23:18:22,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:18:22,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-12 23:18:22,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:18:22,500 INFO L87 Difference]: Start difference. First operand 984 states and 1252 transitions. Second operand has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 19 states have internal predecessors, (81), 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) [2021-11-12 23:18:24,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:18:24,148 INFO L93 Difference]: Finished difference Result 1010 states and 1297 transitions. [2021-11-12 23:18:24,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-12 23:18:24,149 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 19 states have internal predecessors, (81), 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 72 [2021-11-12 23:18:24,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:18:24,154 INFO L225 Difference]: With dead ends: 1010 [2021-11-12 23:18:24,154 INFO L226 Difference]: Without dead ends: 1004 [2021-11-12 23:18:24,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 408 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=387, Invalid=735, Unknown=0, NotChecked=0, Total=1122 [2021-11-12 23:18:24,156 INFO L933 BasicCegarLoop]: 730 mSDtfsCounter, 80 mSDsluCounter, 5801 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 498.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 6531 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.86ms SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 560.91ms IncrementalHoareTripleChecker+Time [2021-11-12 23:18:24,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 6531 Invalid, 366 Unknown, 0 Unchecked, 5.86ms Time], IncrementalHoareTripleChecker [51 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 560.91ms Time] [2021-11-12 23:18:24,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2021-11-12 23:18:24,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 996. [2021-11-12 23:18:24,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 691 states have (on average 1.784370477568741) internal successors, (1233), 986 states have internal predecessors, (1233), 16 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (18), 7 states have call predecessors, (18), 16 states have call successors, (18) [2021-11-12 23:18:24,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1267 transitions. [2021-11-12 23:18:24,179 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1267 transitions. Word has length 72 [2021-11-12 23:18:24,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:18:24,179 INFO L470 AbstractCegarLoop]: Abstraction has 996 states and 1267 transitions. [2021-11-12 23:18:24,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 19 states have internal predecessors, (81), 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) [2021-11-12 23:18:24,180 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1267 transitions. [2021-11-12 23:18:24,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-12 23:18:24,181 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:18:24,181 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] [2021-11-12 23:18:24,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:18:24,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2021-11-12 23:18:24,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:18:24,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:18:24,806 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 431 more)] === [2021-11-12 23:18:24,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:18:24,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1038250558, now seen corresponding path program 3 times [2021-11-12 23:18:24,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:18:24,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [780659451] [2021-11-12 23:18:24,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:18:24,808 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:18:24,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:18:24,809 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:18:24,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 23:18:25,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-12 23:18:25,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:18:25,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 23:18:25,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:25,757 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:25,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:27,296 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:27,297 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:18:27,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [780659451] [2021-11-12 23:18:27,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [780659451] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:18:27,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1708302220] [2021-11-12 23:18:27,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:18:27,298 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:18:27,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:18:27,298 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:18:27,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-12 23:18:33,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-12 23:18:33,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:18:33,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 23:18:33,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:33,337 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:33,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:33,774 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:18:33,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1708302220] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:18:33,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075142361] [2021-11-12 23:18:33,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:18:33,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:18:33,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:18:33,777 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:18:33,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3362a593-3908-4475-ac14-046069569cc1/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process